BlueDevil Head Gasket Sealer

#driveyourlife

NCB_38386BlueDevil Head Gasket Sealer (#38386) will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs. BlueDevil contains no solid or particulate matter, and will not clog or harm your engine. It bonds to metal, aluminum, cast, alloy, or plastic, and it’s safe and easy to use. BlueDevil is compatible in gasoline and diesel engines. It stops leaks permanently. Our article on the symptoms of  a blown head gasket is a good starting place to correctly identify your gasket issues.

  • Permanent repair for Head Gaskets, Warped or Cracked Heads, Heater Cores, and Freeze Plugs
  • Contains no solid or particulate matter that can harm a vehicles engine
  • Alternative solution for costly and time consuming repairs
  • Safe and easy to use

 

 

For More Information, Please Visit: BlueDevil Products: Head Gasket Sealer

 


BlueDevil Head Gasket Sealer

385 responses to "BlueDevil Head Gasket Sealer"

385 Comments

  1. ernie kaler on April 28, 2013 at 12:14 am

    why does the 16 oz bottle not say” to remove thermastate” , and the 32 oz bottle does? doesent make since to me. product works great! must say the money back guarentee made the differance to try it. cant waste money on a fixed income. also it means you stand buy your product. hard to find real quality anything these days.I will always recomend this product.this is my first time to comment on any product.its that good.im sure your products will go far.

    • BlueDevil Pro on April 29, 2013 at 12:31 pm

      Thank you so much for your comments!

      In regards to the Head Gasket Sealer, you may use either product. The “Pour N Go” (16 oz./white label) is a less concentrated formula that does not require the removal of the thermostat or a flush of the cooling system prior to use. The “Pour N Go” was specifically formulated so that it was an “easy to use” product and through testing we were able to develop a formula that didn’t require the removal of the thermostat but still carries a high success rate. Whereas the “Mechanic Approved” (32 oz./yellow label) requires both the removal of thermostat and a flush before applying the product; the 32 ounce is the more concentrated formula.

      The product with the yellow label (32 ounce) will give you best overall results as long as you can remove the thermostat and flush the system prior to use.

      Feel free to contact us with any questions.

      • Russ Jennings on January 10, 2014 at 10:25 pm

        I have a 2005 Toyota 4Runner V6 and the thermostat is built into the housing and the hose connection, the thermostat cannot be removed. Can I still use the yellow label product? I have already purchased it. Thanks

        • BlueDevil Pro on January 13, 2014 at 3:07 pm

          The way you can get around the housing is by taking a old thermostat and modifying it so that the middle piece does not close; you may remove, or gut, the middle of the thermostat. By doing so you will create a free flow and still be able to have the full housing installed.

          Once the process is complete you will need to replace the thermostat.

          Feel free to contact us with any further questions.

          • rosalina McClelland on June 7, 2018 at 4:16 pm

            I have a 2007 vw rabbit food I just put it in the coolent?



          • BlueDevil Pro on June 8, 2018 at 8:36 am

            Rosalina-

            Feel free to contact our technical support line at 888-863-0426 with any questions.

            Thank you!

            -BDP



          • Wyan Joseph on February 19, 2021 at 10:44 am

            Hi I have a 2010 Audi A4 Quattro. I have a oil leak ,a head gasket leak , and have oil in spark plug cylinder 3. I don’t know which of the blue devils to get honestly. Can I use more then one? I was going to use the oil leak, and the head gasket leak sealer pour And go one together . But I don’t know if thats a good idea. And is this product good for luxury cars?.



          • BlueDevil Pro on February 19, 2021 at 3:18 pm

            Wyan-

            Thank you for asking about your Audi A4. Unfortunately, we don’t manufacture a product intended to seal a head gasket that is leaking oil. BlueDevil Head Gasket Sealer is only intended for water/coolant leaks. A hard part repair/engine replacement may be your best option.

            Thank you!

            -BDP



      • Joe on July 2, 2014 at 7:12 pm

        So do you put the thermostat back in after you run through the BlueDevil process? I’m a novice about automobiles and looking for very specific instructions about using BlueDevil w/a 2003 Ford Expedition.

        Thanks
        Joe

        • BlueDevil Pro on July 3, 2014 at 2:30 pm

          Joe,

          I would encourage you to give our Tech Line a call at 1.888.863.0426. They are available to help you with any specific questions in regards to the installation process. I’d recommend doing this prior to installation. If you don’t get a live rep, leave a message! They WILL call you back, usually within a few hours at most.

          -BDP

          • brandon on August 21, 2016 at 8:10 pm

            do you think it would work if my car doesnt start



          • BlueDevil Pro on August 22, 2016 at 9:10 am

            Brandon-

            In order to get the benefit of the product, the vehicle would need to be able to idle for a full 50 minutes, without overheating or stalling out. Unfortunately, the car would not be a good candidate if the vehicle is unable to start.

            Thank you!

            -BDP



          • Kevin on February 5, 2018 at 5:53 pm

            Hi,I have a 2001-2005 Honda Civic 1.7 l which is also know for head gasket issues….Is it ok to add Bluedevil if you don’t have a blown hg just so it will seal that area or would it get hard and not work…I’m afraid my hg is going to blow but I don’t have any issues right now with it…Kevin



          • BlueDevil Pro on February 6, 2018 at 10:46 am

            Kevin-

            Thank you for asking about your Honda Civic. The BlueDevil Head Gasket Sealer should not be used as a preventative measure or preventative maintenance. It is only intended for water/coolant leaks. At this point, if you are not noticing a leak, it would not be appropriate to use the product. Hope this helps!

            Thank you!

            -BDP



          • Jerermiah on June 18, 2021 at 4:13 pm

            Does blue devil head gasket repair stop exaust from going in coolant?



          • BlueDevil Pro on June 21, 2021 at 8:19 am

            Jeremiah-

            Yes, the BlueDevil Head Gasket Repair would be able to treat a leak where combustion/exhaust gases are pumping into the cooling system. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50-minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly.

            Thank you!

            -BDP



      • David Straw on July 23, 2014 at 3:04 am

        Dose this product work or am i wasting my time and money

        • BlueDevil Pro on July 29, 2014 at 5:20 pm

          Yes, our products carry a success rate over over 90%. We offer a money back guarantee for the small percentage of customers that they do not work for.

          Feel free to contact our tech support team at 888.863.0426 with any further questions.

          • jennifer on August 8, 2014 at 1:15 pm

            i have a 1998 pontiac sunfire. i took it to the garage and they told me that it was the head gasket. how long does it take to change one of these, and how effective is your product?



          • BlueDevil Pro on August 8, 2014 at 2:53 pm

            Jennifer,

            Replacing your head gasket is a very timely job. Our products are very effective and carry a money back guarantee. If you have more questions regarding the installation process please give our tech line a call at 1.888.863.0426.

            Thanks,
            BDP



          • Bill Connell on June 24, 2021 at 10:12 pm

            You say to pull the spark plug on the leaking cylinder, what about on a 6.7 Cummins Diesel engine?



          • BlueDevil Pro on June 25, 2021 at 8:22 am

            Bill-

            Unfortunately, this recommendation would not be applicable for your Cummins Diesel, as you would not be able to pull the glow plugs. As long as the vehicle will maintain idle for the full 50 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant during that 50 minute run, you would still be a good candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



      • Richard Rivet on January 25, 2015 at 2:30 pm

        I have a 1999 honda passport with the v6 .I just purchased the Blue devil yellow lable and flush online but now I just realised that half of the engine has to come apart just to remove the thermostat. I can bypass the heater core but it is so much work to remove the thermostat that I may as well just change the gasket or is it possible to us the yellow lable without removing the thermostat?

        • BlueDevil Pro on January 27, 2015 at 10:17 am

          Richard-

          For best overall results the thermostat should be removed when using the 32 ounce BlueDevil (yellow labeled) Head Gasket Sealer. If it is going to be difficult to remove then you would be better off using the BlueDevil Pour-N-Go Head Gasket Sealer due to the fact that it does not require the removal of your thermostat.

          -BDP

      • Alex on February 2, 2015 at 10:18 am

        What do I do if water leaked to the oil?? Do I have to do an oil change before doing the flush?? Or can I do the flush and sealant before an oil change?

        • BlueDevil Pro on February 2, 2015 at 1:41 pm

          Alex-

          Yes, you may still use the BlueDevil Head Gasket Sealer to seal the leak(s). For best results, you will want to change the oil before and after the BlueDevil process.

          Thank you for your question!

          -BDP

      • mike on September 4, 2015 at 11:21 am

        I do not know a lot about cars and have done the test with he radiator cap off and it erupts like a volcano.I can’t afford the $2500 or more to replace the gasket, and I know I can’t remove all the stuff it says to so is it OK to use the 16oz or should I find some to help remove the thermostat and use the 32oz? There is no smoke /steam coming from the exhaust

        • BlueDevil Pro on September 19, 2015 at 10:24 am

          Mike,

          Thanks for your question about your blown head gasket. If your vehicle is a 4 or 6 cylinder than it should be fine to use the 16oz BlueDevil Pour-N-Go to seal your head gasket leak. If you have an 8 cylinder vehicle then we would recommend using the 32oz BlueDevil Head Gasket Sealer.

          Let us know if you have any more questions!
          -BD Auto Pro

        • Bonnie anderson on February 23, 2019 at 2:25 pm

          Should I redrain my coolant with the blue devil in it after the 50 minute idel. Before I pit in new coolant.

          • BlueDevil Pro on February 25, 2019 at 9:04 am

            Bonnie-

            The BlueDevil Head Gasket Sealer only reacts to heat once, so it would be fine to drain the system completely and refill it with your regular 50/50 mix once the procedure is complete.

            Thank you!

            -BDP



      • Karl on February 7, 2016 at 2:24 pm

        Can blue devil, white label be used on a v8 ?

        • BlueDevil Pro on February 8, 2016 at 10:51 am

          Karl-

          Yes, but you will need to add two 16 ounce bottles of BlueDevil Pour N Go Head Gasket Sealer to treat a V8.

          Thank you!

          -BDP

      • Cornell Long on August 20, 2016 at 7:12 pm

        What if you didnt flash the radiator and pour the bluedevil into the coolant will it do any harm

        • BlueDevil Pro on August 22, 2016 at 11:36 am

          Cornell-

          It wouldn’t necessarily do any harm in the cooling system, however, you would be limiting what the product would be able to do. The reason for flushing the radiator is to ensure you are performing the BlueDevil process in a clean, free-flowing system. Also, the BlueDevil Head Gasket Sealer (32 oz. yellow label) is specifically formulated to run with water in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

          • Dan on January 22, 2017 at 4:14 pm

            I flushed my truck without flushing as well. It worked, but I still have a dirty cooling system. Can I still flush the cooling system to get rid of the exhaust particulate?



          • BlueDevil Pro on January 23, 2017 at 10:13 am

            Dan-

            Yes, at this point, you would be safe to flush the cooling system. We recommend using the BlueDevil Radiator Flush http://store.gobdp.com/radiator-flush-00204/. Flushing the system would not undo any of the seal the product already created.

            Thank you!

            -BDP



      • Tanasha on December 1, 2016 at 4:49 pm

        I have 2000 ford taurus and I think I have a blown head gasket will this product work what do I have to do

        • BlueDevil Pro on December 2, 2016 at 10:05 am

          Tanasha-

          Thank you for asking about your Ford Taurus. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

        • Joe on July 10, 2020 at 7:50 am

          How much Blue Devil Sealant ( Yellow Label) do I need for a 2003 Tacoma 4 cylinder 2 gallons coolant capacity truck?

          • BlueDevil Pro on July 10, 2020 at 8:26 am

            Joe-

            You would be adding about 10-12 oz. of the BlueDevil Head Gasket Sealer for your Toyota Tacoma. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



      • Najee on January 17, 2017 at 8:27 am

        Can it be used to seal up my manifold leak?

      • Antoine Joshua Marshall on January 25, 2017 at 5:05 pm

        I use the yellow label bottle without removing my thermostat on accident

        • BlueDevil Pro on January 26, 2017 at 9:06 am

          Antoine-

          Please contact our technical support line at 888-863-0426 so that we can get a clear understanding of the vehicle’s condition and be able to make any appropriate recommendations. The thermostat must be removed when using the BlueDevil Head Gasket Sealer (32 oz. yellow label) in order to get proper results.

          Thank you!

          -BDP

        • Juan Tamayo on January 8, 2021 at 12:52 am

          Did anything bad happen to your vehicle ? I’m in the same boat !

      • Thfb on February 18, 2017 at 1:28 pm

        How many ounces do I use in a Toyota Camry 6 cylinder

      • William on March 10, 2017 at 5:42 am

        I just poured the 32 oz bottle in my radiator, without flushing, or removing the thermostat as recommend . Can I go and purchase the 16oz bottle and use it now? And if so can I use two bottles?

        • BlueDevil Pro on March 10, 2017 at 10:21 am

          William-

          It is very important to flush the radiator and remove the thermostat prior to using the BlueDevil Head Gasket Sealer. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

      • Patty on March 11, 2017 at 11:41 am

        All the auto parts store near me only sell the 16 of will that work on a 350

        • BlueDevil Pro on March 13, 2017 at 10:26 am

          Patty-

          The BlueDevil Pour-N-Go Head Gasket Sealer is intended for use in 4 or 6 cylinder engines. You can still use the product in your Ford F-350, however, you would need more of the product to properly treat the system. Please contact our technical support line at 888-863-0426 so that we can get a better idea of the cooling system capacity and be able to recommend the correct amount of the product to use.

          Thank you!

          -BDP

      • Hunter on March 13, 2017 at 7:49 pm

        Do you have to change the before or after using blue devil?

        • BlueDevil Pro on March 14, 2017 at 9:56 am

          Hunter-

          I assume your question is asking about changing the oil in your vehicle in regards to using the BlueDevil Head Gasket Sealer. If you are getting water/coolant into the oil, we recommend changing the oil before and after the BlueDevil process. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Christopher Munoz on March 22, 2017 at 3:40 am

        I have a 1991 honda accord how much of this product am i suppose to use and is it a one time thing or do i apply more of it everyday once a week or ?
        Thank you

        • BlueDevil Pro on March 22, 2017 at 10:28 am

          Christopher-

          You would use about 10-12 ounces of the BlueDevil Head Gasket Sealer to properly treat your Honda Accord. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Michael Rudd on March 27, 2017 at 4:07 pm

        Just curious about use in a 2008 6.4 power stroke I’m leaking from the passenger back corner of the head and a freeze plug. Is this stuff safe for a 6.4 power stroke?

        • BlueDevil Pro on March 28, 2017 at 8:59 am

          Michael-

          Yes, the BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) is safe and compatible to use on your 6.4 power stroke. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

          • Kirstin Burrage on May 7, 2019 at 6:10 pm

            I have a 2014 Nissan Frontier that is loosing all of the coolant through the overflow tank. It boils out. So I’m guessing gas is getting out of the chamber. It doesn’t state on the bottle that I need to remove a spark plug, tho I read it in the comments here. Removing a spark plug from my truck is almost as serious as replacing the head gasket. What should I do? Will anything work?



          • BlueDevil Pro on May 8, 2019 at 9:15 am

            Kristin-

            Thank you for asking about your Nissan Frontier. Removing the spark plug is an additional recommendation we make when the vehicle has the symptom of combustion/exhaust gases pumping back into the cooling system. Unfortunately, it is a more extreme kind of leak, usually attributed to warped/cracked heads. In order to get the benefit of using the product, you would want a clean, free-flowing cooling system. If combustion/exhaust gases are getting into the system, the system is being over-pressurized, and the circulation of water/coolant is being restricted. Removing the spark plug from the affected cylinder would give the product the best chance of circulating and sealing properly.

            Thank you!

            -BDP



          • Kirstin on May 8, 2019 at 1:38 pm

            I’m in the process of using the yellow label blue devil’s now. While idling, my 2014 Nissan Frontier does not boil all of the water out of the resavoir. Why is that? As soon as it hits the pavement, it starts boiling out, as if it’s allergic to the road. Lol I can’t take a spark plug out, I would have to take half of the manifold off.
            Also, the entire time it has been idling, the radiator fan has not come on. It’s 85 degrees here today, shouldn’t it have come on by now? My Nissan isn’t overheating. Yet… But it’s not boiling out water yet either.



          • BlueDevil Pro on May 8, 2019 at 3:43 pm

            Kristin-

            It sounds like it will be able to idle the full 50 minutes without removing the spark plug. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



      • Larry on May 1, 2017 at 3:55 pm

        If you have water in your oil will the Blue Devil head gasket sealer still work

        • BlueDevil Pro on May 1, 2017 at 3:57 pm

          Larry-

          Yes, BlueDevil Head Gasket Sealer will still work if water/coolant has entered the engine oil. We recommend that you change the oil before and after the BlueDevil procedure to ensure proper results.

          Thank you!

          -BDP

      • Denika on May 2, 2017 at 3:38 pm

        I don’t no we’re to put it in my car

        • BlueDevil Pro on May 2, 2017 at 3:57 pm

          Denika-

          BlueDevil Head Gasket Sealer should be added directly through your radiator cap.

          If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the overflow bottle. Once it has been added reconnect the hose and start the idle from that point.

          Thank you!

          -BDP

      • Manny on May 3, 2017 at 9:34 pm

        How Long do I wait to put coolant in after I use this

        • BlueDevil Pro on May 4, 2017 at 8:33 am

          Manny-

          We recommend waiting about 2 hours, to ensure the system is cool enough to add coolant.

          Thank you!

          -BDP

      • Harold on May 23, 2017 at 6:29 pm

        I have a 7.7 turbo diesel hino j08e engine. It has a bad head gasket causing back pressure. If I use the 32oz. As directed would blue devil work

        • BlueDevil Pro on May 24, 2017 at 11:43 am

          Harold-

          Yes, the BlueDevil Head Gasket Sealer would be able to seal the leak in your turbo diesel. Be sure to follow the cooling system capacity table on the back of the bottle to ensure the proper amount of product is used.

          Thank you!

          -BDP

          • Josh on July 31, 2019 at 8:11 pm

            I have a 2003 Toyota salara and for some reason my radiator pushing the water back Thur my overflow not the engine how do I use the Blue Devil



          • BlueDevil Pro on August 1, 2019 at 8:49 am

            Josh-

            Thank you for asking about your Toyota Solara. Based on your description, it’s possible that you are getting combustion/exhaust gases pumping back into the cooling system. You can use a “Block Dye Tester” to confirm whether or not that is the case.
            BlueDevil Head Gasket Sealer will still work if your vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system.

            Thank you!

            -BDP



      • Pepe on August 15, 2017 at 2:09 pm

        So I have a Volvo s70 1999 and the engine turns but won’t start! When I crank it with the reservoir tank open the water goes and comes in sync with the motor. Is it too far gone?! It worked wonders on my ML320! I can’t believe how much money you guys saved me! You have an amazing product!

        • BlueDevil Pro on August 16, 2017 at 8:58 am

          Pepe-

          Thank you for asking about your Volvo s70. In order to get the benefit of using the BlueDevil Head Gasket Sealer, the vehicle would need to be able to idle for a full 50 minutes. If the vehicle won’t start, unfortunately, it would not be a good candidate for the product. A hard part repair may be your best option.
          We’re glad to hear of the results you had on your ML320! Thank you for sharing.

          Thank you!

          -BDP

      • bill on November 11, 2017 at 6:48 pm

        My vehicle runs cool not operating temp without thermostat is that OK

        • BlueDevil Pro on November 13, 2017 at 9:42 am

          Bill-

          As long as you are not worried about the vehicle’s heat function, leaving the thermostat would be fine. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Tyrone on December 6, 2017 at 7:26 pm

        Do I have to drain the pourand go

        • BlueDevil Pro on December 7, 2017 at 9:21 am

          Tyrone-

          The BlueDevil Pour-N-Go Head Gasket Sealer only reacts to heat once. After the initial 50 minute idle and you shut the vehicle off, the product will not continue to react or continue to seal. You are fine to leave the product in the system, or you can drain the system and start over with a clean 50/50 mix, either way would be fine.

          Thank you!

          -BDP

      • Jhon adams on January 9, 2018 at 8:55 pm

        I noticed that has different information about red labels and white labels one says remove the termostats I used twice the 16 Oz with termostats on as full heater on my cat stop blown heat for some reason is there any one can give me the answere why Mt cat not blown heat as it should be or some thing wrong

        • BlueDevil Pro on January 10, 2018 at 12:23 pm

          Jhon-

          Yes, we manufacture two different head gasket sealers with two different sets of directions. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of your vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

      • Kacy on March 23, 2018 at 8:02 pm

        Won’t it plug up the heater n ac ?

        • BlueDevil Pro on March 26, 2018 at 9:42 am

          Kacy-

          The BlueDevil Head Gasket Sealer does not contain any solid or particulate matter, so it would not have some of the clogging/restricting tendencies that some other products could have. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Jonathan on May 26, 2018 at 3:00 pm

        Can you use the pour and go on a v8 engine? Will it even work the. Bottle says 4 or 6 cy I have e a v8

        • BlueDevil Pro on May 29, 2018 at 8:24 am

          Jonathan-

          You would need two bottles of the BlueDevil Pour-N-Go Head Gasket Sealer to treat your V-8. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Seth on July 10, 2018 at 9:08 am

        Hey I put the blue devil in my 06 Altima and it worked but I didn’t put the thermostat back in will it hurt anything if I don’t ?

        • BlueDevil Pro on July 10, 2018 at 9:36 am

          Seth-

          It would not harm anything to run the engine with the thermostat removed. The engine will run at a lower temperature so you may notice the heater does not produce hot air. However, most likely you will not need the heater during this time of year.

          Thank you!

          -BDP

      • David Moore on August 14, 2018 at 1:59 pm

        Can it be used in v8 engines

        • BlueDevil Pro on August 14, 2018 at 3:19 pm

          David-

          Yes, the BlueDevil Head Gasket Sealer is safe and compatible to use in V-8 engines. The Pour-N-Go Head Gasket Sealer (16 oz. white label) is intended for use in 4 or 6 cylinder engines and require two bottles for a larger engine. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • David on September 11, 2018 at 4:34 pm

        I have a 6.0 diesel will it work on it?

        • BlueDevil Pro on September 12, 2018 at 8:17 am

          David-

          Yes, the BlueDevil Head Gasket Sealer is safe and compatible to use on your 6.0 diesel. As long as the vehicle will maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minute run, you would be a good candidate for the product.

          Thank you!

          -BDP

      • DAVID LUCIUS on September 25, 2018 at 6:25 pm

        How long do I wait to drive it after putting it in?

        • BlueDevil Pro on September 26, 2018 at 9:19 am

          David-

          We recommend at least two hours of a cool down after the 50 minute idle. After the vehicle cools back down, you would be fine to top it off with water/coolant as needed and take it for a test drive at that point.

          Thank you!

          -BDP

      • Carl on November 26, 2018 at 2:31 pm

        If I have water in my oil will it fix it to

        • BlueDevil Pro on November 27, 2018 at 9:10 am

          Carl-

          The BlueDevil Head Gasket Sealer would be able to treat water getting into the engine oil. As long as you are not losing water too quickly, you would be a good candidate for the product. You would want to change the oil before and after the BlueDevil procedure.

          Thank you!

          -BDP

      • Kimberly on January 9, 2019 at 4:00 pm

        Does your heater have to be working for product to work?

        • BlueDevil Pro on January 10, 2019 at 8:45 am

          Kimberly-

          Are you saying that your heater core is leaking or that you aren’t getting hot air when you put the heater on? As long as the vehicle will maintain idle for a full 50 minutes, without overheating, you would still be a good candidate for the product. The BlueDevil Head Gasket Sealer is able to seal heater core leaks as well. Feel free to contact our technical support at 888-863-0426 with any other questions.

          Thank you!

          -BDP

          • Aaron on September 4, 2021 at 12:19 am

            I have a 2004 Jeep Grand Cherokee v8, is one bottle of the mechanic approved enough?



          • BlueDevil Pro on September 8, 2021 at 8:28 am

            Aaron-

            Yes, one bottle of the BlueDevil Head Gasket Sealer would be sufficient for your Jeep Grand Cherokee. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



      • larry james taylor on February 11, 2019 at 3:17 am

        Do apply the sealer if car wont start on a cadillac seville 1997

        • BlueDevil Pro on February 11, 2019 at 9:55 am

          Larry-

          Thank you for asking about your Cadillac Seville. In order to get the benefit of using the BlueDevil Head Gasket Sealer, the vehicle would need to be able to start and idle for a full 50 minutes. If it is unable to do so, the leak you have or the symptoms you’re having may be a little more extreme than what the product is intended for. A hard part repair may be your best option.

          Thank you!

          -BDP

      • Abdullah Jones on February 18, 2019 at 11:38 am

        Can blue devil work on a v10 if I pour two white labels in the radiator?

        • BlueDevil Pro on February 18, 2019 at 1:50 pm

          Abdullah-

          Two bottles of the BlueDevil Pour-N-Go Head Gasket Sealer would treat a cooling system up to around 4.5 gallons capacity. The product would be compatible to use on a V-10 engine.

          Thank you!

          -BDP

      • Jamie L Joyce on July 26, 2020 at 11:11 pm

        what if you can’t remove the thermostat like on a diesel it’s built in

        • BlueDevil Pro on July 27, 2020 at 8:31 am

          Jamie-

          The best way to get around the thermostat housing is by taking the thermostat and modifying it so that the middle piece does not close; you may remove this piece or gut the middle of the thermostat. By doing so you will create a free flow and still be able to have the full housing installed. The thermostat should remain “open” while BlueDevil circulates through the system. Once the BlueDevil procedure is complete you will need to replace the thermostat.

          Thank you!

          -BDP

      • Kountry on October 5, 2020 at 12:58 pm

        I was just in a bad car accident and now I’m down to just one truck and it has blown head gasket and I’m so hurt that I can’t remove the Thermostat will the product still work good If I just do blue devil and then oil change will it fix the problem I hope so I have a 5.9 dodge

        • BlueDevil Pro on October 5, 2020 at 3:55 pm

          Kountry-

          Thank you for asking about your Dodge. The BlueDevil Head Gasket Sealer ( 32 oz. yellow label) will give you best overall results as long as you can remove the thermostat and flush the system prior to use. However, if the thermostat is difficult to remove or you would rather not then you can always use the “Pour N Go” Head Gasket Sealer or Head Gasket Repair. The products may be added with fresh antifreeze or water. Based on your cooling capacity, you should apply 32 ounces of BlueDevil.

          Thank you!

          -BDP

      • Anthony Marquez on November 29, 2020 at 4:08 pm

        I have a chevy 454 how many bottles would have to use?

        • BlueDevil Pro on November 30, 2020 at 9:50 am

          Anthony-

          One bottle of the BlueDevil Head Gasket Sealer should be sufficient for your Chevy 454. There is a cooling system capacity table on the back of the bottle which would show you how much product to use, per the vehicle you’re working with.

          Thank you!

          -BDP

      • Ogreatone on December 23, 2020 at 12:19 pm

        Can you apply the Pour N Go formula and if your results work can u flush system and then add the Yellow Label 32 ounce

        • BlueDevil Pro on December 23, 2020 at 1:42 pm

          Ogreatone-

          The product should not be used as a preventative measure/maintenance. If you are not continuing to lose coolant after using the BlueDevil Pour-N-Go Head Gasket Sealer, it would not be necessary to add anymore. Once the product seals, it would be a permanent seal.

          Thank you!

          -BDP

        • Eugene carrion on August 30, 2021 at 11:17 pm

          I have a 2012 sonata and it is losing coolant.and runs great and no coolant in oil. What size bottle should I use and what procedure should I do to fix the problem thanks

          • BlueDevil Pro on August 31, 2021 at 8:26 am

            Eugene-

            Thank you for asking about your Hyundai Sonata. Do you know where the leak is coming from? How quickly are you losing cool? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



      • Wayne Harrell on March 8, 2021 at 5:29 pm

        I have a 1980c10 Scott’s dale had for 16years two weeks ago the head gasket blew I put bars head gasket sealer in didn’t work will this kind work and can I get my money back if it doesn’t

        • BlueDevil Pro on March 9, 2021 at 8:57 am

          Wayne-

          What are the symptoms the vehicle is having? Yes, the BlueDevil Head Gasket Sealer carries a money-back guarantee. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

      • Daniel on March 14, 2021 at 9:30 am

        In my Silverado the thermostat is made in the thermostat housing so can you put it in with the thermostat in place

        • BlueDevil Pro on March 15, 2021 at 10:34 am

          Daniel-

          The best way to get around the thermostat housing is by taking the thermostat and modifying it so that the middle piece does not close; you may remove this piece or gut the middle of the thermostat. By doing so you will create a free flow and still be able to have the full housing installed. The thermostat should remain “open” while BlueDevil circulates through the system. Once the BlueDevil procedure is complete you will need to replace the thermostat.

          Thank you!

          -BDP

      • Brian on June 24, 2021 at 6:10 pm

        So I have a 2004 Land Rover, when started it makes a hissing popping sound from the head gasket being blown, I have used Blue Devil before with a 100% success. The question is will the big bottle fix the issue it being a crack about a half inch.

        • BlueDevil Pro on June 25, 2021 at 8:18 am

          Brian-

          Thank you for asking about your Land Rover. How quickly is it losing coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

      • Deedee smith on July 21, 2021 at 1:36 pm

        I have a 2003 alero thermastat in hard area does it have to be removed before using this product

        • BlueDevil Pro on July 21, 2021 at 3:55 pm

          Deedee-

          Thank you for asking about your Oldsmobile Alero. If removing the thermostat is an issue, we recommend using the BlueDevil Pour-N-Go Head Gasket Sealer. This is an easy, do it yourself formula that does not require the removal of the thermostat. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Jerry on July 23, 2021 at 10:13 am

        I used bar’s and it hasn’t worked all that well, is it safe to use the blue devil pour and go after using bar’s?

        • BlueDevil Pro on July 23, 2021 at 10:43 am

          Jerry-

          You would want to make sure the cooling system is thoroughly flushed prior to adding the BlueDevil. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Charlotte Price on September 8, 2021 at 4:58 pm

        ii have a 2004 pt cruiser and i think i have a warped head will this help. it runs hot so will it still work.

        • BlueDevil Pro on September 9, 2021 at 8:17 am

          Charlotte-

          Thank you for asking about your PT Cruiser. The BlueDevil Head Gasket Sealer is able to treat warped heads. As long as the vehicle will maintain idle for a full 50 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant during that 50-minute run, you would be a good candidate for the product.

          Thank you!

          -BDP

      • roland on September 28, 2021 at 2:10 am

        do you mean i can use the blue devil 32 oz without removing my termostat? i already purchased the 32oz bottle…so im thinking if i will buy another? tnx

        • BlueDevil Pro on September 28, 2021 at 8:20 am

          Roland-

          The product with the yellow label (32 ounce) will give you best overall results as long as you can remove the thermostat and flush the cooling system prior to use. If you are unable to remove the thermostat, or doing so it just too time consuming, the Pour-N-Go Head Gasket Sealer (16 ounce) would be the next best option.

          Thank you!

          -BDP

    • cruz on January 9, 2016 at 2:00 pm

      I have a 2002 nissan altima 2.5 do I have to remove both thermostat

      • BlueDevil Pro on January 11, 2016 at 9:46 am

        Cruz-

        Yes, for best results both thermostats should be removed; this will ensure free flow throughout the cooling system.

        Thank you!

        -BDP

    • Kadisha Brown on January 6, 2017 at 5:44 pm

      Will this product work for a frezze plug that’s leaking really fast?

      • BlueDevil Pro on January 9, 2017 at 9:54 am

        Kadisha-

        Yes, the BlueDevil Head Gasket Sealer would be able to seal a leaking freeze plug. As long as the vehicle can maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the product.

        Thank you!

        -BDP

    • javier camacho on January 25, 2017 at 11:57 am

      will work for diesel engine ?

      • BlueDevil Pro on January 25, 2017 at 2:04 pm

        Javier-

        Yes, the BlueDevil Head Gasket Sealer is safe and compatible to use in diesel engines.

        Thank you!

        -BDP

    • Stormy Young on February 10, 2017 at 1:36 pm

      So if i got water coming out of tail pipe continuesly will it still work

      • BlueDevil Pro on February 10, 2017 at 2:02 pm

        Stormy-

        As long as the vehicle will maintain idle for a full 50 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/). Unfortunately, if you are losing more than that in the allotted time, a hard part repair may be your best option.

        Thank you!

        -BDP

    • Joshua Holly on January 23, 2018 at 5:10 pm

      So what if someone forgot to remove thier thermostat?

      • BlueDevil Pro on January 24, 2018 at 10:15 am

        Joshua-

        The reason removing the thermostat is required is to create a free-flowing system. It would help out with the overall circulation of coolant throughout the system and also help the vehicle from overheating during the 50 minute idle. Failure to remove the thermostat would limit the effectiveness of the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

      • Tim on June 9, 2019 at 7:26 am

        I have a 2005 Duramax 6.6 LLY with a possible head gasket issue. If it is the head gaskets, what do you suggest?

        • BlueDevil Pro on June 10, 2019 at 9:24 am

          Tim-

          The BlueDevil Head Gasket Sealer is safe and compatible to use on diesel engines. What are the symptoms the vehicle is having? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

    • Stephen Foley on September 9, 2018 at 7:12 pm

      What happens if I leave the thermostat in Up using the 32 oz bottle

      • BlueDevil Pro on September 10, 2018 at 9:53 am

        Stephen-

        Not removing the thermostat, with use of the BlueDevil Head Gasket Sealer (32 oz. yellow label), would greatly limit the effectiveness of the product. The thermostat is removed to create a free-flowing system, which would help with circulation and help the product get to the leak point(s) a little better. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

    • Ryan on April 8, 2019 at 5:21 am

      When you’re using a concentrated sealer if you do not flush your system and get rust and debris out this stuff will harden and take to all that rust and literally build up like a block in small crevices like a thermostat at a lock it up… If you have a really clear system after flushing you can pour it in your top hose right on top of your thermostat I’ve done it with the smaller bottle twice now but I must say doing it with a bigger bottle you might want to but I’ve seen pictures of cut open heater cores and radiators and this stuff will literally Harden like a rock into the entire cavity if you don’t get that rust out or any leftover stuff from the corrosive gasoline getting in and that’s in the case of a breach like mine where the exhaust is constantly blowing into the coolant system… but I washed my steam go away in 15 minutes and it’s 90% sealed up I’m pretty sure the only way I’m going to get it sealed up is if I disable the cylinder matter fact I’m going to make sure and ask these guys that question

    • Lois Washington on June 5, 2019 at 12:05 pm

      Do I have to drain the oil out if its mixed with water

      • BD Auto Pro on June 5, 2019 at 11:58 pm

        Lois,

        Thanks for your question! Yes if your oil has water in it, which will make it looky milky white or light brown if it is mixed in then yes you should definitely drain the water and oil and add fresh oil. We would recommend possibly doing this again after 500 miles to make sure you’ve got all the water out of your oil. Also, driving your car regularly after you remove the water will help get the last little bit of moisture out through the PCV system.

        Thanks again for your question!
        -BD Auto Pro

    • Stephen Pickron on April 13, 2020 at 3:27 pm

      I have a 2002 Chevy Tahoe with the 5.3…it doesnt have a radiator cap just the cap on the coolant reservoir…is it the same process with this style set up ?

      • BlueDevil Pro on April 13, 2020 at 4:07 pm

        Stephen-

        Thank you for asking about your Chevy Tahoe. If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the reservoir. It may be added into the hose or the opening on the radiator. Once BlueDevil has been added, reconnect the hose and start the idle from that point.

        Thank you!

        -BDP

  2. Matt Bates on April 29, 2013 at 4:51 pm

    This product flat out works. I had a rebuilt motor that for whatever reason started to overheat after 8,000 miles. Air was getting into the cooling system to the point that the vacuum was displaced by that air so coolant was not returning to the radiator from the overflow tank. Followed the instructions including removing the thermostat and flushed through about 15 gallons of water through the system. Put in straight water and ran it for 50 minutes. It passed three tests; the block test, the champagne test and a two hour road test. Magic!

  3. brian sperry on May 7, 2013 at 8:22 pm

    I’m trying to use the pour-n-go on a 1986 isuzu trooper, but every time I start the engine without the radiator cap on, coolent shoots out of where the radiator Cap should go. Am I supposed to be pouring it into the reservoir or directly into the radiator? If I’m supposed to pour it into the radiator I don’t understand how its possible to do so.

    • BlueDevil Pro on May 20, 2013 at 2:27 pm

      If your vehicle has a reservoir rather than a radiator cap, instead of pouring it through the reservoir, with the car off and engine cold, you may add the product through the top radiator hose. Once it has been added reconnect the hose and start the idle from that point.

      Based on what you have stated, it appears that you are getting combustion gases blowing back into the cooling system creating pressure and causing the coolant to blow out through the top of your radiator. To give yourself the best overall chance of the product working successfully, in addition to the directions, I would remove the spark plug from the cylinder with the leak. To find the “bad plug” you may pull all of the spark plugs, you should notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and allow the product to seal properly.

      • Jacob on February 2, 2014 at 6:58 pm

        I have a similar problem. I know its a gasket leak and I am trying to apply blue devil because I cannot afford the hardware fix. But when I start my car and turn the heater on the radiator fluid is not being sucked through the engine and at first back flows through my radiator cap and overflows. Is this the same issue with combustion gasses causing to much back pressure?

        • BlueDevil Pro on February 6, 2014 at 5:38 pm

          Jacob, Could you call our 18888630426 line to discuss?

  4. Shawon on May 14, 2013 at 4:25 pm

    Went I take the thermostat out to flush leave it off for good are put it back went I use blue devil head gaskets sealer

    • BlueDevil Pro on May 20, 2013 at 2:22 pm

      You will leave the thermostat out for the full 50 minute idle with the BlueDevil. Once the idle is complete you will then shut the vehicle off and allow it to cool for at least 2 hours. After it has cooled, you may then reinstall your thermostat.

  5. Mike on May 21, 2013 at 12:35 pm

    I used another brand sealer first(I dident hear of your product yet).
    will Blue Devil work if I use it after I flush the system?

    • BlueDevil Pro on May 21, 2013 at 1:05 pm

      Yes, it can still work in this situation. We would strongly recommend running BlueDevil Radiator Flush (https://gobdp.com/radiatorflushproduct.html), or a comparable flush, to clean your cooling system and remove the prior product that you had previously added.

      Feel free to contact us with any further questions.

      • Mike B on May 23, 2013 at 11:45 pm

        I never could really believe it until I saw it. BLUE DEVIL HEAD GASKET SEALENT WORKS! No BS, I have a 1999 Cadillac Deville that was starting to vent coolant out the exhaust, skipping badly, and a flashing check engine light for a bad misfire.
        After the proper flushing of the system and adding the Blue Devil( (properly)) it cleared up before my eyes. The next day after a test drive it ran like it was brand new. No codes at all, and no skip at all. My temps never went above 193 even at idle.
        For all of the people who say it can’t work, Face it. Your dead wrong. Follow the directions right and it will work. I have to admit I did not think it would work. I stand corrected. Thank you Blue Devil! You now have a loyal customer for life.

        Mike Baker
        Watertown NY

    • Daniellee on May 18, 2019 at 3:32 am

      I bought the 32oz yellow label .do I use the whole thing on my 02 chevy imapala

      • BlueDevil Pro on May 20, 2019 at 8:32 am

        Daniellee-

        As per the cooling system capacity table on the back of the bottle, you would be using 16 oz. for your Chevy Impala. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

  6. Lee Taylor on May 26, 2013 at 4:10 pm

    THANK YOU THANK YOU THANK YOU a 1000 times thank you for this product! I was all set to do a head gasket replacement on a 2000 Ford Ranger with 170000 miles that ran good but would not pass smog in California. It had a head gasket leak around cylinder #5. I ran across videos of Blue Devil gasket sealer on youtube and started checking into it. I found that it was a well known “secret” among the used car dealers and mechanics in the area. The bottom line is that it worked just like it said and was easy and inexpensive to use. My truck passed smog and runs better than ever!!! I will definately put the word out that this is a fantastic product. Thanx again from a very satisfied customer!

  7. Mike B on June 10, 2013 at 8:44 pm

    I am trying this on another Cadillac Deville after working fantastic on my first one. This one is a 2000 the last was a 99. While I was letting it idle for the required 50 min at around the 48 min mark it went into the red. Should I wait to flush the product and let it cool off and run it again? Or should I still flush it. I could not test drive do to the running in red.

    • BlueDevil Pro on June 11, 2013 at 12:50 pm

      Yes, you should allow the vehicle to cool down completely (at least 2 hours) before driving or running it any more. Once it has cooled you can then take it on a test drive to see where it’s at. It is possible that it has still worked properly even though the vehicle was starting to heat up toward the end of the 50 minutes.

      Once the vehicle has cooled and you have a chance to drive it let us know if the vehicle is still experiencing any symptoms. If not, you should be good to go.

  8. sean on June 13, 2013 at 12:42 am

    my car is 2003 vanture van.3.4L engine .sympttailpipeoverheat, combustion gas went into coolant, coolant wont return. presure in coolant is higher than nomal , the heater hose is very hard when squizz. now the symptom is more offen. in first 5 min driving , overheat,pull over , and turn off engine, opened air blizz valve to get air out. opened cap of radiator ,let cooant ho back to radiator, then it is ok to drive more than 50km ,even in highway. next day, same problem. i thought :after i start engine, combustion air or gas went into coolant. after the engine was heat up, the leak stopped or particularly stopped. I guess.didnot notice big white smoke came out from tailpipe.
    question: is blue devil can fix this small leak?
    thanks.

    • BlueDevil Pro on June 26, 2013 at 1:47 pm

      As long as it will idle for a full 50 minute period without overheating or stalling out you should have no problems. I would also recommend removing the spark plug from the affected cylinder to reduce the pressure buildup within the cooling system. Removing that plug will relieve a majority of the compression blowing into the cooling system and and allow BlueDevil a better chance at sealing.

      If it isn’t able to run for that period the BlueDevil may not have a chance to work properly.

      Please contact us with any further questions.

      • Latoya Taylor on November 10, 2014 at 4:49 pm

        I have a 2000 Chevy Cavalier. I tried the Blue Devil today. After about 30mins, the car overheated. Is there a chance the blue devil won’t work now? Im letting it cool down.

        • BlueDevil Pro on November 11, 2014 at 9:36 am

          Latoya-

          If it was unable to run the full recommended 50 minutes without overheating then there is a chance that it may not work. Please contact us at 888-863-0426 and we would be happy to discuss your vehicle and a possible solution.

          Thank You,

          BDP

  9. Galen Manapat on June 14, 2013 at 4:25 pm

    When I use this, after the initial 50 minutes of running, does the water / B/Devil chemical mix remain in the system ? Can it remain in the system to plug “future leaks” ?

    Is there any point in removing the mix (after the treatment) and letting the system cure “dry” ?

    • BlueDevil Pro on June 26, 2013 at 1:29 pm

      It may remain in the system but it does not continue to seal. However, once sealed it creates a permanent repair. There is no reason to let the system air dry.

      Feel free to contact our tech support team at 888.863.0426 with any further questions.

  10. Charles B on June 23, 2013 at 5:31 am

    I have a blown head gasket on a Chevrolet diesel truck. I read the advice on how to add sealer when the radiator doesn’t have a cap by adding the sealant to the top radiator hose. I also have combustion gasses coming through my cooling system. How do I locate and disable the cylinder when there is no spark plug?

    • BlueDevil Pro on June 26, 2013 at 1:49 pm

      You are correct in pouring it through the top hose rather than the reservoir. However, due to the fact that your vehicle is a diesel it has glow plugs rather than spark plugs. You will be unable to disable the affected cylinder. Therefore, we would not recommend running the BlueDevil with your specific situation.

      • jeff on September 15, 2015 at 5:29 pm

        Will blue devil pour n go work on a 6.4l v8 diesel?

        • BlueDevil Pro on September 16, 2015 at 3:05 pm

          Jeff-

          The BlueDevil Pour-N-Go Head Gasket Sealer is intended for use in 4 or 6 cylinder engines, so one bottle would not be enough for your v8 diesel. Feel free to contact our technical support line at 888-863-0426 with any specific questions.

          Thank you!

          -BDP

  11. Bill on June 29, 2013 at 4:04 am

    I poured it directly into the overflow rather than pulling the radiator hose. Will I be ok? Also, what is a “compatible antifreeze to use with this once I restore my thermostat and refill the system?

    • BlueDevil Pro on July 2, 2013 at 1:36 pm

      The best method is pouring directly through the radiator hose when you only have access through the reservoir. It should still work but for future reference we recommend using the top hose. You can use any factory recommended anti-freeze.

  12. Al on July 1, 2013 at 6:37 pm

    Used 32 oz. Head gasket sealer in 97 Gm pickup. 350 v-8 w/ ac. Still have water in oil. Added water during 50 minute idle. Should I use more than one bottle and NOT add water during idle? Cooling capacity is 5 gallons.

    • BlueDevil Pro on July 2, 2013 at 1:38 pm

      This will depend on whether or not you changed the oil after the BlueDevil application. Please contact 1.888.863.0426 for more information.

      • Al on July 3, 2013 at 8:06 pm

        Of course I changed the oil. Why wouldn’t you just say change the oil and ….Whatever your advice would be??

        • BlueDevil Pro on July 3, 2013 at 8:56 pm

          Please contact our technical support team at 888.863.0426 so that we may discuss the best options for your vehicle moving forward.

  13. Vo Huy on July 2, 2013 at 6:24 am

    I have an 89 Buick century sedan, I found out it was an head gasket issue, there was some oil in the reserv overflow, however…no white smoke out the tail, but the engine does run very rough.
    I purchased the Headgasket sealer, but a “mechanic” told me I didn’t have to change out the thermostat.I already have the new thermostat part ready to be installed by someone that knows how, I think he did’nt want to do it because he had said earlier to me that mine was hard to get to.
    he added it, but when I went to pick up the car…the car was off!
    I went ahead and took my car home, let it idle for an hour and an half, shut it off and started it later on that day, and at first it sounded like a brand new engine! Like a new car really.
    I drove it, and it rode like a dream.
    Later on that day–it was in the 90’s in florida–I drove to walmart….and the car was smoking some around the engine, and it started running a little rough again, like it was overheating too a little.
    My questions are:
    I know I need to have that thermostat installed, but should I also add another bottle of bluedevil?
    someone said to me that could lock my motor up? is that true?
    what about that pour-n-go? is that safer? should I use that now?
    I really need my car, and I cannot afford a regular repair. What Should I do?
    Thanks in advance—-Vo

    • BlueDevil Pro on July 2, 2013 at 1:41 pm

      Unfortunately, BlueDevil is not intended for situations were oil has entered the cooling system. Please contact 1.888.863.0426 to discuss your situation in greater detail with our tech department.

  14. Leo R. on July 9, 2013 at 7:44 am

    I have a 2003 toyota camry 4 cylinder with a blown head gasket due to the cooling failure when the water pump went. I used the 16oz bottle and it fixed 2 of the 3 cylinder misfiring. Then I decided to try one more 16oz. hoping to fix the remaining problem. It still has the problem of misfiring in one cylinder after the first test drive. Any suggestion, the car will run but not 100% due to the one cylinder not working. Thanks and I will really appreciate your help. God bless.

    • BlueDevil Pro on July 15, 2013 at 8:05 pm

      Please contact our technical support team at 888.863.0426 so that we may discuss your vehicle in more detail and come up with the best plan of attack.

  15. Billy P. on July 26, 2013 at 9:20 pm

    When I flush the radiator do I also flush the engine block ?

    • BlueDevil Pro on July 29, 2013 at 2:24 pm

      Thanks for your question! Please contact our support line for all technical questions regarding our products. 1.888.863.0426

  16. Shannon Sulton on July 28, 2013 at 12:57 am

    Hi. A friend of mine told me that I had a blown head gasket. Okay….so..he put the blue devil in, but I don’t know much about cars, so I do not know what else he did. I drove my car home about 20 min away…car still overheated…few days later…test drove…overheated and white smoke still…..A week later, I started my car, no smoke no overheat but still running rough and I put in drive and cut off. I have a 2004 Toyota Solara. Is it possible that Blue Devil did not work? Maybe problem was too severe, but I am very happy no more white smoke that fills up my neighborhood 🙂

    • BlueDevil Pro on July 29, 2013 at 2:23 pm

      Thanks for your question! Please contact our support line for all technical questions regarding our products. 1.888.863.0426

  17. martin on July 29, 2013 at 4:04 am

    hi I a 2002 Toyota Camry my capacity of water is 6.2L do I use only 1/2 a quart of the 32 oz bottle

    • BlueDevil Pro on July 29, 2013 at 2:23 pm

      Thanks for your question! Please contact our support line for all technical questions regarding our products. 1.888.863.0426

  18. ReddFoxx on August 23, 2013 at 8:44 pm

    I have a 4 cyl 97 honda accord. I found oil in the water and the techs at work told me it’s the head gasket. I’ve heard great things about blue devil and am about to attempt to use it. However, I’m going to use the 16oz bottle because i dont really have enough money for the 32. But i heard the 32 is more concentrated. Does that mean the 16 oz wont work for as many miles as the 32? I had the same problem with a 98 mercury sable and used some off brand sealant for the local auto parts store. It ran for at least 20,000 miles and would have gone farther if I hadnt ran it with ice in the lines (ran out of coolant a day before the first frost of the year. How many miles can i typically expect to get out of the 16 oz bottle. I dont drive aggressively and only about 25 or 30 miles a day. Id appreciate any input. I hope this works.

    • BlueDevil Pro on August 26, 2013 at 4:13 pm

      Unfortunately, BlueDevil is not intended for situations where oil has entered the cooling system. We recommend getting a hard part repair in a situation like the one you have described.

  19. Renee Johnson on August 27, 2013 at 4:05 pm

    Do I have to flush my radiator to put the blue devil in my car

    • BlueDevil Pro on August 28, 2013 at 5:38 pm

      Yes, a radiator Flush is required for installation of our BlueDevil Head Gasket Sealer, Part#38386

  20. Lucas storrs on August 29, 2013 at 6:10 am

    91cCr7l657O6 IM going to use the blue devil yellow label 32 oz in my vehicle do I need to flush afterwards before adding coolent the instructions say no but I read that it will gel up the system if any is left in.

    • BlueDevil Pro on September 3, 2013 at 1:09 pm

      No, you do not need to flush the system afterward. Once the BlueDevil process is complete and the engine has cooled you may simply drain the cooling system and refill with the factory recommended antifreeze. There is no risk of “gel” forming within the system.

      Feel free to contact our tech support team at 888.863.0426 with any further questions.

  21. Angelo on August 30, 2013 at 1:39 am

    Hello,I bought today,8/29/2013,a bottle of the 32oz blue devil,I have a 2001 Chev s10 with a 2.2 in it,apparently it has a bad head and the compression goes to the radiator,so for what I have been reading I have to remove one of the spark plugs in order to successfully complete the process,my question is,what happens if the truck starts running hot after 10 min of running it?will my four cylinder still run without one of the spark plugs?

    • BlueDevil Pro on September 3, 2013 at 1:09 pm

      In order for BlueDevil to work properly the vehicle must be able to idle for a full 50 minute period without stalling out or overheating.

      Based on what you have stated, it sounds like the vehicle is getting combustion gases blowing into the cooling system creating pressure and causing the coolant to blow back out through the top of your radiator. To give yourself the best overall chance of the product working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak. If you pull all of the spark plugs, you will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly.

      Before using the product we recommend that you pull the plug from the affected cylinder and then run the vehicle to see if it will maintain an idle for 50 minutes. You should only use the product if the vehicle is able to run for the full 50 minutes.

      Feel free to contact us with any questions.

      • doug on September 7, 2016 at 8:04 pm

        With or without the cap on

        • BlueDevil Pro on September 8, 2016 at 8:33 am

          Doug-

          You would idle the vehicle for 50 minutes with the cap on. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  22. Suzy J on September 7, 2013 at 5:19 pm

    We recently bought our daughter a 2000 Grand Am GT 3.4 automatic, private party sale. One month into owning this, after discussing symptoms and location of a coolant leak with a mechanic brother of mine, we suspect it has a LIM gasket leak. Will this product work for that? We can NOT afford to pay upwards of $1000 to replace the gasket. We should have researched this vehicle more thoroughly, but ran a carfax that came back clean, so we felt confident in the purchase. Arg! We’re hoping for a fix that will get her through 2 years of high school.

    • BlueDevil Pro on September 9, 2013 at 2:02 pm

      Yes, the BlueDevil Head Gasket Sealer will work for a leaking Intake Manifold. Feel free to contact our tech support team at 888.863.0426 if you have any questions regarding the install.

  23. Brandon on October 3, 2013 at 8:18 pm

    I was wondering if the blue devil will stop water coming into my oil??

    • BlueDevil Pro on October 8, 2013 at 1:15 pm

      Yes, BlueDevil Head Gasket Sealer will work in this situation. However, you will need to change the oil before and after the process. If you need further assistance, please call 1.888.863.0426.

  24. Corey L. on November 21, 2013 at 4:54 am

    Will bluedevil work for my 1995 sedan deville 4.9 liter? Its over heating and has anti freeze leaking out of tail pipe. Had headgaskets heads n gaskets replaced, but believe mecahic didnt tighten gaskets at correct tork r sequence. Cant pay for another head gasket job.

    • BlueDevil Pro on November 25, 2013 at 5:00 pm

      Corey,

      Yes, the BlueDevil Head Gasket Sealer would be appropriate to help remedy the slight coolant leak(s) on your Cadillac. Feel free to contact us at 888.863.0426 with any further questions.

      Thanks,
      BlueDevil Pro

  25. jflo on November 28, 2013 at 4:44 am

    My thermostat assembly has no gasket without the thermostat installed. When i run the blue devil through the block for 50 minutes, a small amount of fluid will seep out the seam of the assembly. Is this ok or should I stick the rubber ring from the thermostat inside the assembly before i do the 50 minute cycle?

    • BlueDevil Pro on December 10, 2013 at 3:26 pm

      jflo,

      So we can get you going in the right direction, please call our Technical Support line and ask for Zach. He’ll be able to offer some more information based on your car in particular.
      1.888.863.0426

      -BDP

  26. marcela coutelin on November 30, 2013 at 3:30 pm

    Hi, question, I´m in Mexico right now and I have blow head gasket, SO I whent to Auto Zone and get your prodect for head gasket sealer, just i like to know if first i do have to remove the oil mixes w/water and put a new oil, or justo put in the sealer whit the oil like that. Thanks

    • BlueDevil Pro on December 10, 2013 at 3:23 pm

      Marcela,

      Please call 1.888.863.0426 so we can discuss your vehicle in further detail. 1.888.863.0426

      Thanks,
      BDP

  27. Vic on December 27, 2013 at 3:57 am

    Hi guys,
    I suspect that I’m getting exhaust gasses passing into the radiator on ’87 Celica (3SGE engine). It’s not so bad yet … Which product would you recommend?

    • BlueDevil Pro on January 7, 2014 at 5:13 pm

      Give us a call VIC to diagnose your issue. Thanks!

      1.888.863.0426

  28. MJA on January 2, 2014 at 6:57 pm

    Wow – what a product. I have an old 1999 Plymouth Voyager Van with 175k miles on it that I use occasionally for picking up wood for my woodworking shop. Around 4 weeks ago it started to overheat with the symptoms of a leaking head gasket. The vehicle is not worth doing a head job on so I thought I would try a sealant first. Initially I used one of your competitors (well known) products and it did not work a hoot. I was about the get the vehicle towed to the breakers yard when I thought I would have one last repair attempt using your product after seeing it on You Tube. I followed the instructions exactly and with no real thoughts of success started the vehicle. After 50 minutes of idling guess what – no overheating. I then drove for the vehicle for over 50 miles and it drove spot on with absolutely normal temperatures. Blue Devil has given my old van some more life! This product works fantastic and I highly recommend it. Many Thanks to the Blue Devil team.

  29. Kerry Schultz on January 5, 2014 at 8:13 pm

    I decided to try your product on my 2002 Pontiac Grand Am 3.4L , I had a cold start misfire problem and this morning it didn’t go away like normal . I did some tests and determined it had a blown head gasket so i went down to AutoZone and bought a 16 oz pour and go bottle . I let the car completely cool down and poured it through the top hose and started it . within less than 5 minutes the misfire went away, I let it run at idle for about an hour and so far it seems to have fixed the problem . I will see how things go for a few days and let you know. Thanks for a great product. well worth the $38 if it holds up.

  30. Alex on January 6, 2014 at 2:05 am

    I have a 97 Chevy Malibu and having misfires and head gasket problems. My vehicle was juddering, engine light flashing and rough idling. I took my vehicle for scanning and received codes P0300 + P0302. To my understanding cylinder #2 has issues. I checked the dipstick the oil looked like mud and oil cap looked like mayonnaise. I know there’s a hole in the head gasket, maybe near cylinder #2. Would your product seal the head gasket? As I’d been hearing good things about your product. Please advise.

    Thanks,
    Alex

    • BlueDevil Pro on January 7, 2014 at 5:04 pm

      Alex,

      Please call our tech line at 1.888.863.0426 to best diagnose your situation.

      -BDP

  31. Jonny on January 12, 2014 at 7:23 am

    I have a 2000 Ford ranger xlt V6 3.0 with water and white smoke coming out of the tail pipe, yes one of the wires from the spark plugs has some dried up mud like residue, and white crystal like substance around where the spark plug goes. Will Blue Devil stop that problem?
    I would appreciate your answer pretty much. Thank you, and my god bless you.

    • BlueDevil Pro on January 13, 2014 at 3:06 pm

      Based on what you have stated, it appears the vehicle is getting combustion gases blowing into the cooling system creating pressure and causing the coolant to blow back out through the top of your radiator. To give yourself the best overall chance of the product working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak. It sounds like you have clearly located the “dirty” plug; this is the spark plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly.

      Feel free to contact us with any further questions.

  32. kevon on January 12, 2014 at 11:19 pm

    I didnt take out thermastat when i put the yellow label blue devil sealer. I poured product directly into hose that leads to radiator and when reached normal operating temp i poured some into overflow tank will it still work?

    • BlueDevil Pro on January 13, 2014 at 2:29 pm

      For proper results, Thermostat removal IS required for installation of this product. The directions on the bottle must be followed during application.

  33. kent adams on January 30, 2014 at 3:57 am

    hi, i just bought some of the yellow label blue devil, and i have one question, i am a bit confused about the thermostat issue..after letting it idle for 50 minutes do i take it for a test drive or let it cool down and replace the thermostate? do you replace the thermostate before or after the test drive and how long od a test drive do you take?.thanks

    kent

    • BlueDevil Pro on January 30, 2014 at 3:22 pm

      Kent, please call 1.888.863.0426 to discuss the installation process in detail. We want to make sure you feel comfortable before applying to your vehicle.

      Thanks!

  34. Junior G on February 3, 2014 at 7:08 am

    I completed the directions. My question is… Can I leave the water/sealant in the motor for the next 24 hrs or do I have to replace the water/sealant with antifreeze? Will the water/sealant freeze. Temperature will drop to 15’F.

    • BlueDevil Pro on February 6, 2014 at 5:37 pm

      Junior, please call 1.888.863.0426 to discuss! Thanks!!

  35. Jared on February 4, 2014 at 4:09 am

    I have a 94 ford explorer I used the seal and go product. I followed the instructions as stated. After the 50 minute idle period we changed the oil cause it had coolant in it. I did this at a auto shop in the lot. After that I drove my vehicle home 10 miles, it ran great. I didn’t drive my explorer again until the next day. I woke up and got ready to go to work at the ski resort. On the way to work in the snow storm my vehicle overheated coolant bubbling from the top of the radiator cap. I was able to get my car running again and drove it back to town. Now the radiator leaks a bit, my oil is coffee colored and I pour out white exhaust more than before. I am willing to try your product again. I feel that when I drove it home from the shop that was my mistake. I was wondering if that is where I messed up. What should I do different next time I use the product. I need my car running as soon as possible. Thank you for your help!

    • BlueDevil Pro on February 6, 2014 at 5:36 pm

      Jared, give us a call at 1.888.863.0426 so we can discuss further…

  36. Joe on February 8, 2014 at 8:54 am

    I have a 1994 Ford Bronco XLT. For the model year, the mileage is exceptionally low (averaging approx. 7500/ yr), only 150k miles on a 20 year old truck. I blew my head gasket last weekend subsequent to spending a night stuck in a glorified puddle after trying to pull a friend loose. After a basic garden hose test of my radiator, I believe my gasket failed secondary to critical fluid levels, potentially due to damage to the lower radiator hose. I have purchased Blue Devil Yellow Label. The truck down idles frequently, and I am concerned as to whether it can idle for 50 minutes. Will the product still perform if I have to restart the truck or add additional water/ coolant during the process? Also, will 1 quart of product be sufficient to seal both the head gasket and the radiator hose leak?

    • BlueDevil Pro on February 10, 2014 at 7:45 pm

      For proper results, your Bronco should be able to idle a full 50 minutes and not lose more than about 1 quart of water during the idling. You will only need one 32 ounce bottle of BlueDevil to treat your vehicle.

      If it is unable to maintain an idle for 50 minutes then it may be a little bit too large of a leak for this to work properly. I would base your decision on whether to use it or not of whether or not it can maintain an idle for that period of time.

  37. jeremy on March 11, 2014 at 5:33 am

    Hi I have a 99 seville sts with the northstar 4.6l v8. I flushed the coolant system with autozones clean and flush per there products directions. With water in engine and their flush, it was boiling out of the reservoir. it did not do this with the coolant in it prior to draining. I have flushed and drained the system and im leaving it with no liquid in it overnight. What do you suggest I do to stop the boiling? Thermostat is removed. Thanks

    • BlueDevil Pro on March 11, 2014 at 3:20 pm

      Based on what you have stated, it appears the vehicle is getting combustion gases blowing into the cooling system creating pressure and causing the coolant to blow back out through the top of your radiator. To give yourself the best overall chance of the product working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak. If you pull all of the spark plugs, you will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly.

  38. Robert on March 19, 2014 at 10:46 pm

    The coolant in the car is rusty brown in color a few days after doing a flush. There is a light brown colored residue stuck under the coolant cap. The coolant smells like exhaust, but there is no pressure or bubbling at the tank as far as I can see. With a new thermostat it blows coolant out the cap at random times. With the thermostat removed the car runs fine with temperature in the correct range. The plugs all look fine. Compression shows 175 lbs in 6 of 8 cylinders and 155 lbs in the remaining two adjoining cylinders. There is no sign of coolant on the dipstick or oil filler cap and there is no excessive steam out of the exhaust.

    In one of your earlier posts, you said the product would not work if oil is in the coolant. I think the rusty brown color indicates there is some oil in the coolant. I am wondering if I should give the blue devil sealer a try or wait for the problem to get worse.

    • BlueDevil Pro on March 20, 2014 at 7:30 pm

      If the brown residue you are seeing is in fact oil within the cooling system then you are correct, the product will not work. You may want to confirm on whether or not that is the case and if it is not oil then we would recommend the use of BlueDevil.

      In the case that it is not engine oil within the cooling system, there is an additional direction you may take to improve the success of our product. Because you are getting exhaust gases blowing into the cooling system you should remove the spark plug from the cylinder with the leak. If you pull all of the spark plugs, you will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product the best shot at sealing properly.

      Feel free to contact us with any further questions.

  39. Michael on April 3, 2014 at 1:08 am

    Will this work on the 6.0 Powerstroke diesel?

    • BlueDevil Pro on April 4, 2014 at 1:49 pm

      Yes, but you will need 1.5 bottles (48 oz.) of BlueDevil Head Gasket Sealer for the application. Please call tech support at 888.863.0426 if you have further questions.

    • Brad on October 28, 2017 at 7:16 pm

      Michael did this work for you?

      • BlueDevil Pro on October 30, 2017 at 9:56 am

        Brad-

        Feel free to contact our technical support line at 888-863-0426 with any questions.

        Thank you!

        -BDP

  40. William on April 24, 2014 at 3:40 pm

    I used blue devil head gasket sealer yesterday on my car. I was told to let it dry for 48hr without starting the car. Do I need to let this stuff dry?? I used the 32oz bottle

    • BlueDevil Pro on April 24, 2014 at 6:09 pm

      After the 50 minute idle, you should allow the vehicle to cool down for at least 2 hours before driving it; you do not need to wait 48 hours.

  41. Jason T on April 28, 2014 at 9:35 pm

    I have a 98 Honda Accord. Over the past 4 months on a warm start my car has had trouble starting. The car rumbles for a few seconds then is normal. I believe it is trouble with one of the cylinders. I took it to Big O and they took out all of the spark plugs and started the car and fluid gushed out of one of the cylinders, which means there is a leak in the block. I do not have any noticeable gasses coming out of the exhaust. Can this problem be fixed with Blue Devil and if so, will the pour and go be a suitable option?

    • BlueDevil Pro on April 29, 2014 at 4:30 pm

      As long as the vehicle will start and be able to idle for a full 50 minute period without stalling out or overheating then you should have a great chance at this working properly. You may also want to make sure that you will not lose more than 1 quart of water during the 50 minute idle.

      If your vehicle is able to stay within those two guidelines you should have no problem sealing the leak.

  42. Ken Rates on May 7, 2014 at 12:00 pm

    I have a 02 Duramax diesel. What are the procedures for using the head gasket sealer? I don’t want to make any mistakes on using. Once I have flushed the system and ready for Blue Devil, do I just pour into a empty system, or do is put water in first? After the 40 minute running time and then cool down, do,I drain and install coolant? Thanks!

  43. James Badaczewski on July 9, 2014 at 1:16 am

    I put blue devil in my 2001 Cadillac devil and started to let my engine idle. after about 15 to 20 minutes my car started overheating. I shut off the car to let it cool down. is it going to hurt my car if I did that?

    • BlueDevil Pro on July 15, 2014 at 3:38 pm

      The product will not harm your engine in any way. However, if the vehicle was unable to idle for the full 50 minutes then that may be an indication that the leak is too large for BlueDevil to work properly.

      Please contact our warranty department at 888.863.0426

  44. james catalano on July 9, 2014 at 6:10 am

    hi i purchased the yellow label bottle and i was unable to finish the 50 min run in time due to a minor failure in my rtv. i was wondering if theis was going to pose a problem in my near future.

    • BlueDevil Pro on July 15, 2014 at 3:39 pm

      For best results, the vehicle should idle a full 50 minutes without being shut off in between. It will not cause any harm if did not run the full 50 minutes but you may not get the full benefit from the use of the BlueDevil Head Gasket Sealer.

  45. Alonna on July 17, 2014 at 11:54 pm

    On a 2002 Cadillac Deville DTS I followed all the directions on the 32oz bottle after 35 to 40 minutes my car ran completely hot…..was that suppose to happen or something else is wrong

    • BlueDevil Pro on July 22, 2014 at 1:47 pm

      It sounds like your Cadillac may be to a point that is too far gone for our product to work properly. Please contact our support team at 888.863.0426

  46. Mercruiser 4.3 V6 on August 7, 2014 at 3:34 pm

    I have a Mercruiser 4.3 V6 that was “rebuilt” last year and this year it seems to have a problem with water getting into the cylinders. I haven’t checked the plugs yet to see which cylinder is the culprit yet but water is getting in somehow. It could be a head gasket, worse a cracked head, or even worse a cracked block. Which of these problems will your product repair? Also what would be the procedure to use your product on an open loop cooling system that uses lake water?

    • BlueDevil Pro on August 7, 2014 at 6:03 pm

      Clay-

      First of all, in order to use the product you will need to create a closed loop cooling system. The BlueDevil Head Gasket Sealer will work in any of the instances you have listed. However, you will need to first be sure you can somehow create a closed loop.

      You may contact us at 888-863-0426 with any questions.

      -BDP

  47. Preston on August 10, 2014 at 3:53 am

    I used the 16oz bottle on my 2002 Nissan Altima 2.5 and the seems to have fix the head gasket but my car over heats now. I hope this didn’t ruined my new thermostats.

    • BlueDevil Pro on August 20, 2014 at 2:30 pm

      Please contact us at 888-863-0426 so that we may discuss your vehicle in more detail.

  48. Dan on August 13, 2014 at 10:09 am

    I have a 2000 bmw 740il with head gasket issue’s. I bought the blue 32oz bottle, follow all instruction. I only used half a bottle of blue devil. The car seems fine for the first 2 days, but now it’s blowing smoke from the exhaust again after parked for 2 hours. Should I pour the remaining half bottle in? I haven’t installed the thermostat, and I didn’t pour any coolant in the radiator yet, so should I add more blue devil? If so, how much more? What the correct amount for 2000 bmw 740il.

    • BlueDevil Pro on August 20, 2014 at 2:32 pm

      Using 1/2 of the bottle is the correct application for your BMW. It sounds like you had some temporary improvement after the initial application but some of the symptoms have since returned.

      We would recommend that you apply the 2nd half of the bottle. You will want to drain the system down and refill with water prior to adding the 2nd dose. The thermostat should remain out for the idling process.

      Feel free to contact us at 1.888.863.0426 with any further questions.

  49. Jacob on August 18, 2014 at 7:24 pm

    I have a Toyota truck with a rebuilt 22RE engine. My problem is not head gasket leak, but it is the gasket between the water pump and timing chain cover.
    It is a paper type gasket. It runs fine and no misfires or anything but a drip leak out of the mentioned gasket. Will this stuff repair this gasket if I follow the directions on your site?
    I already have the thermostat removed & no need to flush…radiator is brand new.
    Thanks

    • BlueDevil Pro on August 19, 2014 at 5:34 pm

      Jacob-

      No, BlueDevil is not intended to fix this type of leak. It sounds like you may need to replace the water pump. Unfortunately, in this instance we would recommend a hard part repair.

  50. Victoria on September 1, 2014 at 2:16 pm

    I have a 2002 Toyota Avalon. It has been over heating and we have replaced the spark plugs, all 6 coil packs, the coolant tank, radiator, and thermostat. Thus, we have come to the conclusion that there is an issue with our head gasket. When trying to use Blue Devil to fix our issue the car started overheating again, right around 25 minutes the car began to overheat again. Should we let the car run through the rest of the 50 minutes or let it cool down before we continue?

    • BlueDevil Pro on September 2, 2014 at 7:44 pm

      Victoria-

      You do not want to let the vehicle to continue its run if it is overheating. Running a vehicle at these high temperatures could potentially cause further damage.

      If the vehicle will not idle for a 50 minute period without overheating then it may just be too large of a leak for BlueDevil to work properly. Please contact our warranty department at 888-863-0426 and we would be happy to assist you in getting reimbursed.

  51. daniel on September 24, 2014 at 10:27 pm

    I used blue devil yellow label a while back, I need to use it again but don’t feel like removing thermostat and flush, can use the pour and go or is ti bad to mix them?

    • BlueDevil Pro on September 26, 2014 at 12:42 pm

      Daniel-

      You should drain your system down completely and refill it. Once you have done so you may go ahead and use the BlueDevil “Pour N Go”. One bottle is good for a 4 or 6 cylinder vehicle.

  52. Mike Davis on October 17, 2014 at 11:49 pm

    My 2002 Kia Rio has gotten hot several times. At least 6 times. I could hear water boiling until I finally found a small hose leaking water. Then, coolant fan would not turn on. Now, randomly, car does not idle well, idles at 2000 rpm, and drive a few days and starts to idle normal. Strange situation. Could it be a warped head, don’t see water in oil or oil in water.

    • BlueDevil Pro on October 22, 2014 at 8:30 pm

      Mike-

      Yes, it is possible that you have a warped or cracked head. You may want to have the vehicle further diagnosed so that you know exactly what you are dealing with.

      If you do find out that it is a warped or cracked head then you would be able to apply the BlueDevil Head Gasket Sealer.

      Feel free to contact our technical support team at 888-863-0426.

      -BDP

  53. Andrew on October 19, 2014 at 12:30 am

    Will this product work for my 95 Cadillac sts? Ive seen others use it for their northstar engines.

    • BlueDevil Pro on October 22, 2014 at 8:18 pm

      Andrew-

      Yes, the BlueDevil Head Gasket Sealer will work in that type of engine. We have had customers successfully use it in that exact model in the past.

      -BDP

  54. Brent on October 23, 2014 at 7:52 am

    I have a ’96 CD5 Honda Accord that I had recently found out has a possible blown head and/or cracked cylinder head (compression test results in cylinder 1 pushing 180lbs). My mechanic had let me know that repairs are going to be somewhere in the $1500 range. Given that my car is well over a decade old, I was looking at two choices, 1) Invest over $1000 into a car that already has over 200,000 miles on the motor and chassis and maybe drive it around for another 2 to 3 years before it craps out or 2) Sell the car as is with a blown head gasket and maybe get $500 for it. I bought Blue Devil as a last resort, and based off consumer reports it was one of the leading brands when it comes to leaky head gaskets and cracked cylinder heads, plus with the money back guarentee I really had nothing to lose. I just installed Blue Devil product yesterday, and I’m very happy to be in that percentile where I can honestly say so far Blue Devil has saved my car! I had followed the instructions to a T, which I believe some people that have had bad experiences with Blue Devil or similar products, failed to do thus resulting in dissapointment. Prior to installation, my radiator fluid would have to be replenished at least once a day, if not 2-3 times a day depending on that days usage. After yesterday, the coolant levels are stable, theres no water or smoke exiting the tail pipe and my car no longer idles rough (Accord is a manual 5 speed, and before Blue Devil I’d sometimes have to lay on the throttle at a dead stop just above 2000 rpm, enough to keep it from idling rough and dying which it has before at a couple red lights). It is too soon to saythat it was a complete success for a fact, but I’m definetly not skeptical of the product considering it has already shown outstanding results. Thanks Blue Devil!

  55. alex on November 3, 2014 at 9:12 pm

    Hi, I poured in the blue devil head gasket sealer. i ran it for 50min without a thermostat. I’m wondering if i can put the thermostat back without draining whatever is left of the blue devil in the system?

    • BlueDevil Pro on November 4, 2014 at 9:58 am

      Alex-

      Yes, you can go ahead and put the thermostat back in at this point. You do not have to drain your system, BlueDevil can safely remain in the cooling system.

      -BDP

  56. Melody on November 18, 2014 at 7:26 pm

    I used the Pour-N-Go in my 2002 Jeep Liberty and it seemed to work for a couple of days. The only real symptom I have is the check engine light (P0303 code) and some coolant in my oil. I want to use it again because I put it in the reservoir rather than the top hose of the radiator. Will I need to flush the cooling system to remove the product that is in there or can I just add another bottle?
    Also will removing the spark plug from the 3rd cylinder really increase the chances of success?

    • BlueDevil Pro on November 19, 2014 at 12:43 pm

      Melody-

      Please contact our tech support team at 888-863-0426 so that we can discuss your vehicle in more detail and recommend the best steps for getting the leak stopped. We look forward to hearing from you.

      -BDP

  57. THE FAST GUYS on November 20, 2014 at 12:19 am

    Corvette with1200 horsepower is what the engine produced. Using twin turbos. Creating 25 pounds of boost through a 7 liter v8. If you can imagine the amount of stress on the gasket. Its probably 10x that. This engine was worth $80,000. Under a full throttle run, the interior sleeve that holds the pistonit cracked right down the side and blew the head gasket on in the same swipe of fate. The car was bleeding coolant profusely. Smoking milky oil. The whole nine yards.

    I flushed the engine Religiously. To the point where you could drink the water then I changed the oil. I put Blue Devil In the system and let the car idle for an hour . The smoking from the tail pipes Went away the remainder of the moisture in the engine dissipated with heat. Into our absolute shockt

    The engine was like new.

    We took it out on the road andall for s**** and gigges and did a full throttle run at 25 pounds of boost which produces 1200 horsepower and ran it up to a hundred and fifty miles per hour. No smoke no anything. Car ran absolutely incredible

    Saved 10,000.00 dollars by using this amazing product. And to think it was under $70 bucks!!!!!!!!!!! Money back guarantee ain’t nothin better than that.

  58. Keith on November 25, 2014 at 6:17 pm

    I have a f150 with a v8. The 16 oz pour and go is good for up to a v6. So do I just use two bottles for my v8?

    • BlueDevil Pro on November 26, 2014 at 2:12 pm

      Keith-

      Yes, you would need to add 2 bottles of BlueDevil “Pour N Go” to treat your V-8 due to the larger capacity.

      -BDP

  59. Aaron on November 26, 2014 at 8:42 pm

    I have a 2003 Audi a4 1.8t 3 days ago I turn my car in and It shows me Tht my coolant is low wasn’t getting heat quickly. Later on in the day I started to see white smoke.while driving the car I don’t see the smoke but as long as u stop the smoke comes out a lot it also gives off a scent of the coolant . For me the coolant tends to run down very fast I have witness the temperature gauge went to red for the very first time appreciate if u can tell me what’s wrong and if it’s the head gasket going bad and if so which would be the right product to use

    • BlueDevil Pro on December 1, 2014 at 2:56 pm

      Aaron-

      You may use either Head Gasket Sealer. The “Pour N Go” (16 oz./white label) is a less concentrated formula that does not require the removal of the thermostat or a flush of the cooling system prior to use. Whereas the “Mechanic Approved” (32 oz./yellow label) requires both the removal of thermostat and a flush before applying the product; the 32 ounce is the more concentrated formula.

      The product with the yellow label will give you best overall results as long as you can remove the thermostat and flush the system prior to use. With the use of either product, be sure to follow the guidelines for the proper amount to use. Based on your capacity, you will be using 16 ounces either way. I would still use a flushing agent to flush your cooling system prior to using the product to ensure proper results.

      -BDP

  60. Jerry on December 6, 2014 at 11:20 am

    I have 2005 Duramax LLY Diesel engine getting high pressure in cooling system. Will not bleed off over night. Looks like it may be Head casket or Head. Will your product help and if so. How do It.

    • BlueDevil Pro on December 9, 2014 at 2:36 pm

      Jerry-

      In a gasoline engine we would recommend pulling the spark plug from the affected cylinder to help relieve the pressure while BlueDevil was being used in the cooling system. However, you will not be able to do so on your diesel so we do not recommend using the BlueDevil Head Gasket Sealer in this instance. It will work on a diesel when you have water going into the oil or coolant leaking out through the exhaust (white smoke) but not with the combustion gases blowing into the cooling system.

      -BDP

  61. sharita on December 7, 2014 at 7:12 am

    I have a 1996 ford taurus an i noticed that the antifreeze leaked in to my oil can i use this product or not

    • BlueDevil Pro on December 8, 2014 at 4:14 pm

      Sharita-

      Yes, you can definitely still use the BlueDevil Head Gasket Sealer and have success. You will want to change the oil before and after the BlueDevil process to ensure proper results.

      Thanks,

      -BDP

  62. John Russell on February 9, 2015 at 4:21 pm

    After taking the thermostat out and loosing some of the liquid (Blue devil + water) , can I replace the lost fluid with antifreeze 50/50, or does it have to be water? I actually did top it off with antifreeze, will this damage my vehicle or the cooling system?

    Thanks

    J Russell

    • BlueDevil Pro on February 18, 2015 at 2:15 pm

      Mr. Russell-

      Yes, you can top the system off with your 50/50 mix of antifreeze.

      -BDP

      • Kurt on October 23, 2015 at 11:52 pm

        I had the same question…does the Blue Devil/water mix have similar properties to a 50/50 coolant mix? Would it be safe to have, say, 10% standard coolant and 90% of the remaining Blue Devil solution as functional coolant?

        • BlueDevil Pro on October 29, 2015 at 8:37 am

          Kurt-a

          The BlueDevil Head Gasket Sealer does not have any properties of antifreeze. The product only reacts to heat once, after that it becomes inert. So once you have completed the 50 minute idle and shut the vehicle off, any extra BlueDevil in the system would be like water at that point. You can either drain all of the contents out and start over with fresh water and antifreeze or drain about half of the contents out and just add antifreeze for your 50/50 mix.

          Thank you!

          -BDP

  63. Juan Rivas on March 22, 2015 at 10:16 am

    I have a 1996 Geo Metro 3 cylinder 1 liter engine. Can I use your 16 oz Pour-N-Go Head Gasket Sealer?

    • BlueDevil Pro on March 23, 2015 at 10:11 am

      Juan-

      Yes, it would be safe and recommended to use the BlueDevil Pour N Go on your Geo if it has a head gasket leak.

      Thank You!

      -BDP

  64. jay on March 26, 2015 at 10:01 pm

    I have a 99 chevy blazer. With a intake leak i have to put water in it every other day will blue devil fix my leak or do i need to replace the gasket right away.?

    • BlueDevil Pro on March 27, 2015 at 9:26 am

      Jay-

      Yes, the BlueDevil Head Gasket Sealer will seal the leak to stop your water loss. We have successfully used it to fix leaking intake gaskets in the past.

      Thank You!

      -BDP

  65. Andrew on April 1, 2015 at 11:48 pm

    I have a 2005 Chevrolet Silverado 2500 with the 6.6l Duramax. I am getting some internal coolant loss. No signs of running hot or tail pipe blow by. I do have a loud exhaust leak type noise that i was told was a small leak in the headgasket. It does not drip.

    Will this product work for that repair?

    If so, how is it done since the radiator has no fill cap only a reservoir to add coolant.

    • BlueDevil Pro on April 2, 2015 at 9:06 am

      Andrew-

      Yes, we do recommend using the BlueDevil Head Gasket Sealer based on your symptoms.

      Since your truck only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there. Once it has been added reconnect the hose and start the idle from that point.

      Feel free to contact us with any further questions at 888-863-0426.

      Thanks!

      -BDP

  66. Susan Heatley on April 28, 2015 at 7:42 pm

    it worked for me, saving me fifteen hundred dollars. Thanks so much Blue Devil. I ran it for a full hour, because after fifty minutes, I could see a small amount of smoke still coming out of the exhaust pipe, ten xtra minutes did the trick,. NO smoke, sealed everything perfect !!! This might buy me an extra year before getting a new vehicle or a new engine!!!! 🙂 very satisfied.

  67. Nicole on June 12, 2015 at 2:23 am

    I just had my car diagnose & found coolant mixed in the motor oil due to defective head gasket also found oil in spark plugs due to defective value cover gasket. Will the bluedevil pour & go head gasket sealant work & If i .use the bluedevil pour & go head gasket sealant will i still pass smog & is it permanent.

    • Nicole on June 12, 2015 at 2:27 am

      My car is a Honda accord 1995 4 cylinder

    • BlueDevil Pro on June 12, 2015 at 2:17 pm

      Nicole-

      Yes, we do recommend using the BlueDevil Head Gasket Sealer. For best results, you should change the oil before and after the process.

      If you are failing smog because of the steam coming from the tailpipe, due to the antifreeze leak, then this will help you pass your emissions test.

      Thanks!

      -BDP

  68. Corey on June 27, 2015 at 9:29 pm

    I have a 2005 F250 6.0 diesel. It seems to be pressuring the cooling system. Will the 32 oz bottle work on this?

    • BlueDevil Pro on June 30, 2015 at 11:55 am

      Corey-

      If it were a gasoline engine we would recommend pulling the spark plug from the affected cylinder to relieve some of the pressure. However, this is not be possible on a diesel engine. For that reason, we would not recommend using the product for your application.

      The BlueDevil Head Gasket Sealer will work on diesel engines and higher compression engines but not when you are getting combustion gases pushing back into the cooling system.

      Thank You!

      -BDP

  69. Beatrice on July 10, 2015 at 10:29 pm

    I have a 99 oldsmobile silhouette with a blown head gasket and I was wondering since my husband replaced the water pump, radiator, heater hoses, and bottom hose should we bleed the air out of the system before we use Blue Devil? We tried to bleed the system before and it’s blowing back

    • BlueDevil Pro on July 15, 2015 at 6:52 pm

      Beatrice,

      Thanks for your question about your Oldsmobile Silhouette. You should bleed the cooling system as much as you can before you add BlueDevil Head Gasket Sealer to ensure you get the best seal on your head gasket leak. First make sure you’ve removed the thermostat as instructed in the BlueDevil Head Gasket Sealer directions. Then, refill your system with water. With the thermostat removed, it will only take about a minute of idling to remove all the air from your system. Once that is complete just follow the directions from there!

  70. ron on August 3, 2015 at 1:43 am

    how can I use your product I have a 2004 Durango and when I remove the thermostat all the water runs out can I use it with thermostat in or what do I do

    • BlueDevil Pro on August 3, 2015 at 1:22 pm

      Ron-

      The way you can get around the thermostat with a housing is by taking the thermostat and modifying it so that the middle piece does not close; you may remove this piece or gut the middle of the thermostat. By doing so you will create a free flow and still be able to have the full housing installed. Once the process is complete you will need to replace the thermostat.

      Thank You!

      -BDP

  71. Shayn on October 4, 2015 at 10:59 am

    I have a ram 1500 with the 4.7 v8. I wanted to know if I could use two bottles of the 16oz pour n go head gasket sealer as I do not have the time or money to flush my system.

    • BlueDevil Pro on October 6, 2015 at 9:23 am

      Shayn-

      Yes, you can still use the BlueDevil Pour-N-Go Head Gasket Sealer for your Dodge Ram 1500 but, you would need at least two bottles of the product. The amount of the Head Gasket Sealer used would be determined by the vehicle’s cooling system capacity. If the capacity is around 4.5 gallons, then two bottles would be enough. If the capacity is closer to 6 gallons, that would require three bottles. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  72. Frank on October 7, 2015 at 10:47 am

    I have a 2003 Subaru Legacy. I replaced the head gaskets because I had coolant in the oil. The gaskets fixed the coolant and oil issue but now I have exhaust gases coming through the radiator. I get very tiny bubbles at idle but will run without overheating. When I drive the vehicle it overheats within 5 minutes and blows the coolant reservoir cap off. I checked all of the spark plugs and they all look like new. How do I find which cylinder is leaking? Thanks.

    • BlueDevil Pro on October 8, 2015 at 8:29 am

      Frank-

      If you have checked all of the spark plugs and they appear ok, we recommend having a compression test performed. Whatever cylinder is reading with the lowest pressure, that is the spark plug you will want to have removed for the 50 minute idle. By keeping that spark plug out for the BlueDevil Process, it will reduce the amount of pressure building up in the cooling system, and allow the product to circulate and seal properly.

      Thank you!

      -BDP

  73. james on October 13, 2015 at 8:37 pm

    Do I leave all the plugs in while using your product…I have a 95 grand Marquis and coolant is sitting in 2 of the plug holes.do I take them out while using the product before I pour the product in..n pressure is in my overflow making it bubble..and my car runs like crap with white smoke coming out the tail pipe.. and I want accelerate over 10 mph..would this really fix my problem..my car been down for 4 months I miss it..glad I have 2..but I need this one also..please help

    • BlueDevil Pro on October 14, 2015 at 11:16 am

      James-

      Based on your description, it sounds like your vehicle may be getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with a low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will sometimes notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly.
      If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there. Once it has been added reconnect the hose and start the idle from that point.

      Thank you!

      -BDP

  74. Kurt on October 23, 2015 at 11:46 pm

    Just finished the 32 oz process on a 2002 Cavalier 2.2. Symptoms were typical…burning coolant in the combustion process with the billowing white smoke and gloppy, coolant-infused oil in the crankcase. Fortunately, the thermostat is easy to get to, although with the gasket being integral to the thermostat housing, I ended up gutting the old one to maintain seal and still allow free flow. I flushed the system, filled with water and added the Blue Devil. After about 10 minutes, I noticed that the low coolant light was on…I misjudged during the fill process and had not filled the system completely. I let it run the 50 minute course anyway and did not add any more water for fear that the cold water would affect the thermal properties of the process. I shut it down and went to work. Upon my return, I topped up the system and ran it for another 50 minutes while noticing a slow trickle from the head for the first couple of minutes. The second run did the trick and after a couple of test runs, the system is tight.

    Things that I believe contributed to the success of the application:

    Thorough cooling system flush.
    Completely full system on the second try.
    Allowing the product to sit outside so the temperature was the same as the water in the cooling system before application. it was a chilly morning and there would have been a 20-30 degree differential.
    Also found it helpful to use 50/50 oil and Marvel Mystery mix with new filter to clear the sludge from the engine. Drain again, another new filter and straight oil.

  75. Pat Castro on October 27, 2015 at 11:42 am

    I have a 2002 malibu which had an overheating issue. My son in law replaced the thermostat, coolant resevoir cap, coolant flush, changed the oil, replaced hoses, exhaust manifold gasket. It run good on test drive. He now informed me it has a slight coolant leak n white smoke out of pipe. Will this work on my car. Will the pour-n-go work?

    • BlueDevil Pro on October 27, 2015 at 12:07 pm

      Pat-

      Based on your description, we would recommend using the BlueDevil Pour-N-Go Head Gasket Sealer. As long as the vehicle can idle for 50 minutes without overheating or stalling out, and you are not losing more than about a quart of water/coolant, you should be able to see some good results from the product.

      Thank you!

      -BDP

  76. brandon on August 21, 2016 at 9:07 pm

    i have a 2002 honda accord 4 cylinder 2.3L. i drove this car home from work one night and all it overheated. so when i arrived i turned the car off and something told me to go back outside and try to start it up. and it just cranked and didnt start. i was told by a mechanic that i had to replace the cylinder head gasket. do you think Blue devil will be helpful now?

    • BlueDevil Pro on August 22, 2016 at 10:10 am

      Brandon-

      Thank you for asking about your Honda Accord. In order to get the benefit of the product, the vehicle would need to be able to idle for a full 50 minutes, without overheating or stalling out. Unfortunately, the car would not be a good candidate if the vehicle is unable to start.

      Thank you!

      -BDP

  77. Jonah j. on January 5, 2017 at 1:30 am

    I added 32oz. Blue devil to my v8 and did not flush system, add water, or remove thermostat. Actually just changed it. Is my truck going to be okay?

    Also do ypu think it helped though at all?

    • BlueDevil Pro on January 5, 2017 at 8:48 am

      Jonah-

      Removing the thermostat and flushing the cooling system are two very important steps to take prior to adding the BlueDevil Head Gasket Sealer. Doing so ensures that the process would be performed in a clean, free-flowing system. Please contact our technical support line at 888-863-0426 so that we can get a better idea of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  78. Charles Flowe on January 18, 2017 at 9:22 pm

    I use Evans waterless coolant. I have a small Head gasket leak. Is this product compatible with Evans coolant.

    • BlueDevil Pro on January 19, 2017 at 3:58 pm

      Charles-

      Yes, the BlueDevil Head Gasket Sealer is compatible with Evans coolants.  However, for best results we recommend flushing your cooling system and refilling it with water prior to adding BlueDevil.  After the 50 minute idle is complete you will then allow the engine to cool down so that you may drain the system and refill it with your antifreeze.

      Thank you!

      -BDP

  79. lonnie wiggins on January 23, 2017 at 11:26 pm

    I HAVE A 2008 F 350 6.4 DESIL LOSING WATER AND SMOKING WHITE OUT OF THE EXHAUST WILL THE BLUE DEVIL WORK ON THIS PROMLEM

    • BlueDevil Pro on January 24, 2017 at 8:47 am

      Lonnie-

      Thank you for asking about your Ford F-250. Yes, the BlueDevil Head Gasket Sealer is safe and compatible to use on diesel engines. As long as the vehicle will maintain idle for a full 50 minutes and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the product. Be sure to follow the cooling system capacity table on the back of the bottle to ensure you are using the proper amount of product.

      Thank you!

      -BDP

  80. jesse taylor on February 17, 2017 at 1:22 am

    after i put the blue devil 16oz in my car is it ok the change my oil a day or two later

    • BlueDevil Pro on February 17, 2017 at 9:00 am

      Jesse-

      Yes, it would be fine to change the oil a day or two after using the BlueDevil Pour-N-Go Head Gasket Sealer. You would want to change the oil before taking the vehicle on a test drive.

      Thank you!

      -BDP

  81. mitchell loeb on February 27, 2017 at 12:06 pm

    can i drive my car after the process is complete or do i need to wait an alloted time? as pour n go can be confusing?

    • BlueDevil Pro on February 28, 2017 at 9:07 am

      Mitchell-

      After completing the BlueDevil Pour-N-Go Head Gasket Sealer process, allow the vehicle to cool down for a couple of hours (at least 2 hours) before topping the system off with antifreeze and taking it for a test drive. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  82. Alan loy mcginns on April 11, 2017 at 9:18 pm

    I have a 98 f150 with a 4.6L v8. White smoke and leaking coolant from tail pipe. My truck doesn’t have a rad. cap … It has a pressurized fill tank. Should i leave enough space in the radiator and slowly add to fill tank, or add all at once (not running) to the top radiator hose? Also will letting it idle for more than 50 min. be beneficial?

    • BlueDevil Pro on April 12, 2017 at 9:08 am

      Alan-

      Thank you for asking about your Ford F-150.  If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring it through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there (it may be added into the hose or through the opening).  Once it has been added reconnect the hose and start the idle from that point. 50 minutes should be sufficient, however, letting it idle for longer than 50 minutes would not do any harm as long as it is not overheating.

      Thank you!

      -BDP

  83. FloGrown on May 31, 2017 at 10:18 am

    How long after driving the car can I add bluedevil (16oz) into the system?

    Case: drive to work at 9 am, how long after that can I run through the process of adding the product to the system (16oz). Does the system need to be completely cold or can I wait 3 hours and add the product?

    • BlueDevil Pro on May 31, 2017 at 4:39 pm

      FloGrown-

      We recommend at least 2 hours of a cool down before adding the product. The vehicle does not have to sit overnight or anything like that. The 3 hours you have described would definitely be acceptable. Feel free to contact our technical support team at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  84. Jose on June 9, 2017 at 9:47 am

    Hello I have a 2004 kia Sorento 4wd v6. I had the heater hose replaced because it was leaking coolant. After the replacement when my mechanic poured the coolant back into the reservoir it went directly into the oil, and the oil dipstick was mixed of coolant and oil. Will blue devil work or is my situation too bad? And after the flush and I pour In the blue devil, will it go directly into the oil as well?

    • BlueDevil Pro on June 9, 2017 at 10:45 am

      Jose-

      Thank you for asking about your Kia Sorento. If all the coolant being poured in goes directly into the oil, unfortunately, the leak you are experiencing would be a little too extreme for the BlueDevil Head Gasket Sealer. A hard part repair may be your best option.

      Thank you!

      -BDP

  85. Daniela Deschamps on August 20, 2017 at 11:55 pm

    I have a 2004 Subaru Forester and I removed the thermostat (and reinstalled the hose) before flushing with the BlueDevil radiator flush. However, when I poured the radiator flush in it just leaked right out where the thermostat had been. The thermostat on my Forester is located underneath the car, maybe that’s causing the problem? Is there a way I can still use the yellow label BlueDevil sealant (I’ve already purchased it)?

    • BlueDevil Pro on August 21, 2017 at 9:59 am

      Daniela-

      Thank you for asking about your Subaru Forester. The way you can get around the thermostat housing is by taking the thermostat and modifying it so that the middle piece does not close; you may remove this piece or gut the middle of the thermostat. By doing so you will create a free flow and still be able to have the full housing installed. Once the BlueDevil procedure is complete you will need to replace the thermostat.

      Thank you!

      -BDP

  86. Jason on September 20, 2017 at 12:56 pm

    Have 2001 LB7 6.6 Duramax with white smoke out of the tailpipe. How many 32oz will i need for this engine?

    • BlueDevil Pro on September 20, 2017 at 1:42 pm

      Jason-

      Do you know the cooling system capacity? One 32 oz. bottle of the BlueDevil Head Gasket Sealer would treat a system up to around 4.5 gallons. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  87. Peggy Walton on October 22, 2017 at 12:10 am

    My 2002 Honda Odyssey has had the radiator replaced at some point. I have flushed and flushed and ready to add the Head Gasket Sealer, but when I measured the amount of water it holds, it just shy of a gallon. The mix starts at 3 gal to 1/2 bottle. Can I still safely use this product?

    • BlueDevil Pro on October 23, 2017 at 10:17 am

      Peggy-

      Thank you for asking about your Honda Odyssey. For a cooling system that only holds about a gallon of water, we recommend using 8-10 ounces of the product. It is not one of those things where more of the product would be better. You really only want to use the recommended amount.

      Thank you!

      -BDP

  88. Derek Drussel on December 13, 2017 at 9:41 pm

    I just used pour n go head gasket sealer on my vehicle and it worked. I now want to flush my oil but will doing so compromise the repair?

    • BlueDevil Pro on December 14, 2017 at 9:11 am

      Derek-

      That is great to hear! No, flushing the oil would not have any effect on the seal the product has already created. You should be good to go at this point.

      Thank you!

      -BDP

  89. Mike on March 17, 2018 at 11:55 pm

    I have a 2000 lincoln towncar with V8 engine, how much of the 32oz yellow label product is recommended?

    • BlueDevil Pro on March 19, 2018 at 9:37 am

      Mike-

      You would need the full 32 oz. bottle of the BlueDevil Head Gasket Sealer to properly treat your Lincoln Town car. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  90. Brock on March 28, 2018 at 8:57 pm

    I have a 2007 Hummer H3 with a 5 Cylinder engine. Will Blue Devil Pour N Go be okay to use?

    • BlueDevil Pro on March 29, 2018 at 8:25 am

      Brock-

      Thank you for asking about your Hummer H3. The BlueDevil Pour-N-Go Head Gasket Sealer will treat a system up to around 3 gallons. As long as the system does not hold more than 3 gallons, one bottle would be sufficient. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  91. byron bush on June 8, 2018 at 2:35 pm

    Used this product in my 01 Civic DX as directed on the container and it has appeared to not work i am now noticing that coolant is shooting out of my exhaust when i rev up the engine or even put the gas in. the engine is a D-17a1.

    • BlueDevil Pro on June 11, 2018 at 9:03 am

      Byron-

      Thank you for asking about your Honda Civic DX. Please contact our technical support line at 888-863-0426 so that we may assist you in receiving the warranty on the product.

      Thank you!

      -BDP

  92. Terry on July 10, 2018 at 7:38 pm

    Good evening. I think I have an intake leak on my 98 5.0 Vortec. It may be a head gasket but of course, no way to tell without disassembling it. will it work for both these issues? Thanks Terry

    • BlueDevil Pro on July 11, 2018 at 9:18 am

      Terry-

      Yes, the BlueDevil Head Gasket Sealer would treat a intake manifold leak as well as a head gasket leak. As long as the vehicle will maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minute run, you would be a good candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  93. Gregory. Vaughn on July 24, 2018 at 7:02 pm

    I have a 01 cadilac devil northstar engine with blown head gasket..will this product work..do i have to drain moter or i can add blue devil with other head gasket.my car keeps running hot and air bubble in Reservoir tank…

    • BlueDevil Pro on July 25, 2018 at 9:21 am

      Gregory-

      Thank you for asking about your Cadillac Deville. Yes, the BlueDevil Head Gasket Sealer (https://store.gobdp.com/head-gasket-sealer-38386/) is safe and compatible to use on your vehicle. If you have used another product previously, you would want to flush the cooling system prior to adding BlueDevil.
      It is also possible that you are getting combustion/exhaust gases pumping back into the cooling system. You can use a “Block Dye Tester” to confirm whether or not that is the case.
      BlueDevil Head Gasket Sealer will still work if your vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system.

      Thank you!

      -BDP

  94. Vernon on August 11, 2018 at 4:18 am

    Can I use blue devil on a car that has no head gasket?

    • BlueDevil Pro on August 13, 2018 at 9:18 am

      Vernon-

      What are the symptoms the vehicle is having? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  95. Stacey Hinnant on August 24, 2018 at 7:23 pm

    I have the same car with the same problem and I can’t access the radiator. Can your product be added to the overflow tank?

    • BlueDevil Pro on August 27, 2018 at 9:49 am

      Stacey-

      If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the reservoir. It may be added into the hose or the opening on the radiator. Once BlueDevil has been added, reconnect the hose and start the idle from that point.

      Thank you!

      -BDP

      • Lee on July 1, 2019 at 11:04 pm

        What is a different between Radiator & Head gasket Sealer and Radiator & Block Sealer . Do you have one Sealer would work for both blown head gasket & cracked block?

        • BlueDevil Pro on July 2, 2019 at 8:57 am

          Lee-

          The BlueDevil Radiator & Block Sealer is intended to treat external leaks (seeps or light drips) coming from the radiator or from the block. The BlueDevil Head Gasket Sealer is the more concentrated product and would treat blown head gaskets, warped/cracked heads, leaking heater cores, leaking freeze plugs, leaking radiators and leaking blocks as well. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  96. John Palmer on November 10, 2018 at 1:56 pm

    My coolant capacity is only 6.5 qts and I used a whole 32 oz. bottle of Blue Devil. Will product still perform properly? I may find out before you reply. It is Saturday. Your product was highly recommended by some very good mechanics I know. Thanks guys.
    The steam stopped coming out of.the tail pipe a few minutes before the 50 monute mark. Thanks.

    • BlueDevil Pro on November 12, 2018 at 9:26 am

      John-

      It seems you have had success with the BlueDevil Head Gasket Sealer. We are glad to hear it! Once the product seals, it would be a permanent seal, so you should be good to go at this point. Feel free to contact our technical support line at 888-863-0426 with any questions.

      Thank you!

      -BDP

  97. Lance on December 1, 2018 at 11:31 am

    I still see water dripping from the back of the engine white smoke still coming from tailpipe. Followed instructions. Will it continue to seal as it cools down or should I have left it running longer

    • BlueDevil Pro on December 3, 2018 at 9:21 am

      Lance-

      The BlueDevil Head Gasket Sealer only reacts to heat once (one heat cycle). Was it able to idle for the full 50 minutes? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  98. Scott5803 on June 21, 2019 at 11:21 pm

    I have a 2007 F150. It does not have a cap on the Radiator just on the reservoir. Where do I add the Red Devil?

    • BlueDevil Pro on June 24, 2019 at 9:10 am

      Scott5803-

      Thank you for asking about your Ford F-150. If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the reservoir. It may be added into the hose or the opening on the radiator. Once BlueDevil has been added, reconnect the hose and start the idle from that point.

      Thank you!

      -BDP

  99. Gerald Francois on July 18, 2019 at 7:02 am

    The best product I have ever used,this BlueDevil
    Pour-N-Go thing work wonderfully on my 2006 Subaru B9 Tribeca, I can’t believe and I love it.
    Awesome!!!

    • BlueDevil Pro on July 18, 2019 at 8:41 am

      Gerald-

      We appreciate your enthusiastic feedback! Once the product seals, it would be a permanent seal, so you should be good to go at this point. Thank you for sharing.

      Thank you!

      -BDP

  100. Tom Dooly on August 5, 2019 at 7:30 pm

    I used the white label pour-n-go. The head gasket test AOK, BUT when I first start to drive after engine cools, the car skip and sputters very bad for the first half mile, then OK. Someone told me that the BlueDevil will cause that, and I need to flush the radiator and add new coolant!! Is this true???

    • BlueDevil Pro on August 6, 2019 at 8:41 am

      Tom-

      Skipping and sputtering would be symptoms of a possible coolant leak, potentially the reason someone would be using BlueDevil to try and treat. If you were getting combustion/exhaust gases pumping back into the cooling system, it would usually force water/coolant to get back into the cylinders and cause a misfire or a rough idle. Try checking your spark plugs. If any look fouled out/deteriorated, you would want to replace them.

      Thank you!

      -BDP

  101. Omar on October 30, 2019 at 1:52 pm

    2007 Acura RDX Turbo. Does not overheat but blows bubbles in overflow. Would the pour-n-go be the product for me?

    • BlueDevil Pro on October 30, 2019 at 2:13 pm

      Omar-

      Thank you for asking about your Acura RDX Turbo. Is the vehicle losing coolant? It’s possible to have air bubbles and it not be related to a blown head gasket or warped/cracked heads. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  102. Brennan on April 10, 2020 at 9:24 pm

    Have a 96 Cadillac fleetwood with a 5.7L lt1 v8 motor and a closed loop system, just did a coolant flush, would I be ok putting yellow label in with fresh coolant or do i need water? And can I put it straight into the water pump? Will burping the air out while doing the idling step cause problems?

    • BlueDevil Pro on April 13, 2020 at 8:28 am

      Brennan-

      Thank you for asking about your Cadillac Fleetwood. As long as the cooling system has been flushed, you should be fine in using the product with coolant. If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the reservoir. It may be added into the hose or the opening on the radiator. Once BlueDevil has been added, reconnect the hose and start the idle from that point.
      The product is attracted to air flow, so you don’t want to add any coolant or bleed the system during that 50 minute idle. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  103. Greg on July 19, 2020 at 11:00 pm

    This product was amazing I just used it today I continue to get a code for cylinder 1 misfire I changed all of the plugs all of the coil packs it is a 5.4 Ford after pulling the number one plug and coil I stuck a camera down there and realized I had a little bit of water on the piston head gasket prob I read online about blue devil went to AutoZone got the big bottle did exactly what they said my truck runs amazing no more water no more misfire absolutely amazing product

    • BlueDevil Pro on July 20, 2020 at 9:26 am

      Greg-

      Thank you for sharing your recent experience with the BlueDevil Head Gasket Sealer. We are happy to hear that the product was able to seal the leak on your Ford! Once it seals, it would be a permanent seal, so you should be good to go at this point.

      Thank you!

      -BDP

  104. Ted Grant on December 6, 2020 at 3:27 pm

    I have a 3 cyl 201 cu. In. Ford diesel tractor which has a leak somewhere. I have replaced the head gasket and visually inspected the head and block surfaces and reassembled paying attention to torque and torque sequence and the tractor still loses coolant – which is very evident in the valve cover as a jelly like substance. Would you expect your product to work for me, and which product would you recommend? Thanks for any help you can give.

    • BlueDevil Pro on December 7, 2020 at 9:29 am

      Ted-

      Thank you for asking about your Ford Diesel Tractor. Based on your description, we’d recommend using the BlueDevil Head Gasket Sealer for your coolant leak. It doesn’t seem that you are losing coolant too quickly, which would make you a good candidate for the product.

      Thank you!

      -BDP

  105. Jocelyne on December 18, 2020 at 9:51 pm

    I have a 98 accord, i understand you have you remove the thermostat to flush the car but do you put it back on when your about to pour and run the car or do you run it without the thermostat for those 50 minutes? Thanks

    • BlueDevil Pro on December 21, 2020 at 8:35 am

      Jocelyne-

      You would be removing the thermostat and leaving it out for the duration of the process. Once the 50 minute idle is complete, and the vehicle is allowed ample time to cool down, you would be able to put the thermostat back in place.

      Thank you!

      -BDP

  106. Kimberly on December 23, 2020 at 8:14 am

    Where do I pour the blue devil in at
    Also just double checking I’m using 2 bottles of the white label because I have a V8 do I have to remove the thermostat just want to make sure before.

    • BlueDevil Pro on December 23, 2020 at 9:34 am

      Kimberly-

      You would add the product in through the radiator cap. If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the reservoir. It may be added into the hose or the opening on the radiator. Once BlueDevil has been added, reconnect the hose and start the idle from that point. The removal of the thermostat is not required to use the BlueDevil Pour-N-Go Head Gasket Sealer.

      Thank you!

      -BDP

  107. Ford on December 26, 2020 at 6:17 pm

    Losing antifreeze and oil is burning at the same time I have a 03 ford explorer v8 eddie bauer addition how much blue devil should I use?

    • BlueDevil Pro on December 28, 2020 at 9:32 am

      Ford-

      Thank you for asking about your Ford Explorer. The BlueDevil Head Gasket Sealer is only intended for water/coolant leaks. Unfortunately, the product would not be able to seal oil leaking from the head gasket. A hard part repair may be your best option.

      Thank you!

      -BDP

  108. Mike Tyson on January 1, 2021 at 11:41 pm

    If I can’t find the spark plug thats causing back pressure in the system can I just leave the radiator cap off . I wasted a whole bottle because of a back pressure problem , all liquid backs up the resovoir boils out and over and collapses the hoses on both sides (98 chevy lumina 3.1).

    • BlueDevil Pro on January 4, 2021 at 12:55 pm

      Mike-

      Thank you for asking about your Chevy Lumina. If you are unable to identify the cylinder that is getting the leak by looking at the spark plugs or if multiple cylinders seem to be getting a leak, we recommend having a compression test performed and removing the spark plug from the cylinder with the lowest compression reading. Leaving the radiator cap off when using the BlueDevil Head Gasket Sealer would not be an option.

      Thank you!

      -BDP

  109. Jecador on January 8, 2021 at 4:40 am

    I have a 2004 nissan titan 4×4 le 5.6 liter and i have a gasket leak i have been running pure water in my cooling system for about a couple months now my truck still runs great it just has a head gasket leak and over heats i wNt to know how much blue devil am i supposed to use for my v8 5.6 and if i still need to flush it since ive been running water and do i also need to take out my thermostat? Thanks

    • BlueDevil Pro on January 8, 2021 at 3:21 pm

      Jecador-

      Thank you for asking about your Nissan Titan. You may use either of the Head Gasket Sealers that we manufacture. The “Pour N Go” (16 oz./white label) is a less concentrated formula that does not require the removal of the thermostat or a flush of the cooling system prior to use. Whereas the “Mechanic Approved” (32 oz./yellow label) requires both the removal of thermostat and a flush before applying the product; the 32 ounce is the more concentrated formula. The product would not adversely react with antifreeze. You are performing a flush of the cooling system to ensure that it is free of any jellied antifreeze, rust or debris that would potentially impede/restrict flow.
      The product with the yellow label will give you best overall results as long as you can remove the thermostat and flush the system prior to use. Keep in mind that based on your cooling capacity you will be adding 16 ounces of BlueDevil either way.

      Thank you!

      -BDP

      • Jecador on January 8, 2021 at 9:34 pm

        Thank you

  110. Ford on January 27, 2021 at 9:52 pm

    I have a 03 ford explorer eddie bauer addition.its getting alot of coolant and moisture in side the block how much blue devil should I use ??

    • BlueDevil Pro on January 28, 2021 at 9:22 am

      Ford-

      Thank you for asking about your Ford Explorer. You would need about 32 oz. of the BlueDevil Head Gasket Sealer for your 8 cylinder. Feel fee to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  111. Artin on February 1, 2021 at 3:47 am

    Hi
    I have a 96 rac4 and I found water leaks into the motor oil due to heat gasket issue. Do you think it would work for my car?

    • BlueDevil Pro on February 1, 2021 at 8:50 am

      Artin-

      Thank you for asking about your Toyota Rav4. Yes, the BlueDevil Head Gasket Sealer would be able to stop water from getting into the engine oil. As long as you are not losing water too quickly, you would be a good candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  112. Gary on July 15, 2021 at 11:43 am

    I have a 2004 Jeep Grand Cherokee Limited 4.7L V8, looks like it has a 14.5 ounce cooling capacity. How much of the pour and go do I need? I almost accidentally used the wrong Blue Devil until I read the instructions.

    • BlueDevil Pro on July 15, 2021 at 1:11 pm

      Gary-

      Thank you for asking about your Jeep Grand Cherokee. You would need two bottles of the BlueDevil Pour-N-Go Head Gasket Sealer for your V-8 engine. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  113. Steph on August 24, 2021 at 1:55 am

    I have a 2010 ford fiesta, I’m suspecting a blown head gasket issue it. Changed up the belts, thermostat and water pump, expansion tank, the cap, and some few hoses. After putting everything together, filled it up with coolant and I noticed it boiling over in the expansion tank, and can smell car getting really hot. I thought maybe I didn’t bleed it well enough. Got it up again to bleed again, drove a little and the car went into limp mode, got back home, and could hear it is misfiring, checked expansion tank and it still boiling.

    Googled a bit and Blue Devil popped up with fairly positive reviews, and lucky me it is available here in South Africa.
    Can I use this stuff on this newer car? Will it work well just until I can raise funds to have the gaskets replaced?

    • BlueDevil Pro on August 24, 2021 at 8:30 am

      Steph-

      Thank you for asking about your Ford Fiesta. Based on your description, it’s possible that you are getting combustion/exhaust gases pumping back into the cooling system. You can use a “Block Dye Tester” to confirm whether or not that is the case.
      BlueDevil Head Gasket Sealer will still work if your vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system.

      Thank you!

      -BDP

  114. Austin on August 30, 2021 at 4:43 pm

    I have a 03 mustang gt that blew a head and idk which one. But how much would I need for a 4.6L v8

    • BlueDevil Pro on August 31, 2021 at 8:20 am

      Austin-

      Thank you for asking about your Ford Mustang. You would need 32 oz. of the BlueDevil Head Gasket Sealer to properly treat your vehicle. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  115. Jessica on August 31, 2021 at 5:59 pm

    If I drive for 50 minutes instead of idle for 50 minutes will I get the same effect?

    • BlueDevil Pro on September 1, 2021 at 8:31 am

      Jessica-

      You would only want to let the vehicle idle during that 50 minutes with the BlueDevil Head Gasket Sealer. Driving the vehicle would put extra compression in the cooling system and would limit the effectiveness of the product. A free-flowing system is what would give the product the best chance of being successful.

      Thank you!

      -BDP

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