What Are the Symptoms of a Blown Head Gasket?

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blown head gasket symptomsThere are some makes or models of cars that have a reputation for blowing head gaskets.  One such vehicle has such a bad reputation for head gasket problems there is a group of owners trying to get the manufacturer to have a recall on them.  If you happen to own one of these vehicles, don’t worry it does not mean that you have a bad car or that you are going to spend lots of money.

What is a Head Gasket?

head gasket, blown head gasket symptomsLet’s start by talking about what a head gasket is.  The head gasket lives between your engine block and cylinder head.  Every modern car has this gasket but they vary in their thickness and construction based on the manufacturer’s design of the engine.   The head gasket is so important because it seals the combustion chamber allowing your car to build the proper compression and contain exhaust gases both of which aid in maintaining the efficiency of your engine.  The head gasket also keeps coolant and oil out of the combustion chamber which is important for the same reasons you wouldn’t want coolant or oil leaking anywhere else.

Now that we understand what a head gasket it, it’s important to learn what head gasket failure symptoms look like to avoid higher expenses due to additional engine damage caused by driving with a blown head gasket.  To understand the symptoms it can be helpful to understand why a head gasket might fail.

Why Do Head Gaskets Blow?

The head gasket forms a seal between the engine block and the cylinder head.  This means your head gasket has to seal both extremely hot, high-pressure combustion gases as well as engine coolant which can be anywhere from cold ambient temperatures to the normal operating temperature of your engine.  Due to the wide range of temperatures and relatively large surface area, it is not unusual for head gaskets to develop leaks over time.  This can happen regardless of the make or model of your car or the type of head gasket used.  To better understand why a head gasket might blow, check out this article on why head gaskets blow.

Since the head gasket seals the coolant passage both from the atmosphere and the combustion chamber you can’t see much of the head gasket on a vehicle with the engine installed.  Because much of the gasket can’t be seen without disassembling the engine, blown head gaskets symptoms can be very difficult to diagnose.  Since a visual inspection usually will not prove a head gasket leak, it is important to know the other symptoms so you can accurately diagnose a head gasket problem.

How To Tell if a Head Gasket Is Blown:

  • Coolant leaking externally from below the exhaust manifold
  • White smoke from the exhaust pipe
  • Bubbles in the radiator or coolant overflow tank
  • Overheating engine
  • White milky oil
  • Fouled spark plugs
  • Low cooling system integrity

External Head Gasket Leak

A head gasket leaking external would cause coolant to come from below the intake or exhaust manifold and often only happens when the engine is completely warmed up.  If there are no other cooling passages or hoses near the head gasket you may be able to positively identify the leak as a head gasket leak, but if there are other cooling passages nearby, you may need to add a UV dye to the coolant  then watch the head gaskets with a UV light to positively identify the leak.

White Smoke From Tailpipe

Most head gasket leaks are internal to the engine allowing coolant to flow into the combustion chamber on every intake stroke.  When this happens to coolant burns/evaporates with the combustion process and appears as white smoke coming from the tailpipe.  This smoke can be differentiated from moisture during a cold start by a sweet smell and will continue even when the engine is warm.  If the leak in the head gasket is large this white smoke can often be excessive and billow from the tailpipe.

Bubbles in the Radiator

Besides allowing coolant into the combustion chamber, an internal head gasket leak allows exhaust gases into the coolant.  This can cause bubbles to be in the radiator or coolant reservoir making the coolant look like it’s boiling even when it’s cold.  The bubbles are exhaust gases that force their way into the cooling system during the combustion process.  An easy do-it-yourself test for a blown head gasket is to perform a chemical test using this type of tester on your coolant to check for the presence of exhaust gases to see if this is happening in your car.  This is the most effective blown head gasket test and can give you a positive sign of a blown head gasket.

Overheating Engine

If you’ve got a blown head gasket, your engine usually will overheat after longer drives.  This happens both due to the lack of coolant as your engine consumes it, but also the efficient combustion process, the excess heat from the exhaust in the coolant and the inability of your vehicle’s radiator to cool the dirty coolant.  If your engine overheats it can cause lots of problems.  The biggest concern is the expansion of metal components past what they were designed for which can cause cracks and warping.  Also, it can permanently damage seals and gaskets cause other leaks in your engine.  Both of these problems often require a full engine rebuild to remedy.

White or Milky Oil

As coolant leaks into your combustion chamber, it will seep past your piston rings into your oil.  Over time oil and water will mix and cause the oil to turn a milky white.  You can look for this on your dipstick and around your engine oil cap.  Having water in your oil will make your oil ineffective in properly lubricating your motor which will quickly allow wear on your cylinder walls and on the crank and camshaft bearings.  Even if you don’t drive the vehicle, the presence of water in the oil can cause rust on machined surfaces which can lead to pitting in the metal and necessitate and engine rebuild.

Fouled Spark Plug

As coolant burns in your combustion chamber, it will leave tiny white deposits on your spark plug usually around the ground strap and electrode.  Other problems can cause these white deposits so this isn’t a conclusive blown head gasket symptom but if others are present it could give you more proof. 

Low Cooling System Integrity

If there is a leak from your head gasket, pressurizing your cooling system and watching for pressure loss can help prove you have a blown head gasket as well.  Since there could be other leaks you don’t know about, this also isn’t a conclusive test, but again just more indications that you may have a blown head gasket.  Similarly, you can perform a leak down test which pressurizes the combustion chamber with compressed air and measured the amount of air that leaks out through the head gasket or any other opening the combustion chamber.

Can I Drive With a Blown Head Gasket?

If you have multiple blown head gasket symptoms, it is important to drive your vehicle as little as possible.  The hot gases and cold coolant moving through the hole in the gasket can quickly erode or warp the metal head or engine block leaving you with costly machining bills or even having to purchase new heads or a new engine and having water in your engine oil can destroy bearings quickly.

How to Prevent a Head Gasket Failure

There are some ways you can reduce your chances of blowing a head gasket.  The first is to keep combustion chamber pressures as low as possible.  If your vehicle is turbocharged or supercharged, make sure your boost level is set to the factory setting to keep combustion pressures in check.  Also, make sure your engine doesn’t have any preignition or knocking from overly advanced timing or carbon build up.  Similarly, maintaining low engine RPMs will reduce stress and heat on your head gasket so avoid running your engine at high RPM.  Lastly, if your car has a manual transmission avoid downshifting to slow the car and rev-match anytime you can to reduce pressure on your head gasket.

If you are rebuilding an engine, you can reduce the risk of a blown head gasket in the future by using properly lubricated head studs torqued in the proper sequence to the correct torque setting.  You can also make sure your block deck and cylinder head mating surface are properly prepared for the new gasket.  Similarly, using a multi-layer steel or other metal head gasket can improve the reliability of your engine.  For more information, check our complete article on how to prevent a blown head gasket. 

These are just a few different steps you can take to prevent a head gasket failure, but sometimes even following these steps you may still end up with a blown head gasket. If not taken care of right away, blown head gaskets can turn into bigger engine problems that will end up being even more costly to fix down the road.

How Much does a Head Gasket Repair Cost?

Head gasket repair cost can vary significantly from vehicle to vehicle.  Cost factors include:

  • Number of cylinder banks
  • Overhead cam VS pushrod engines
  • Head or block damage
  • other components replaced

Most of the cost of a head gasket repair is in the labor costs so the complexity of the job can change the cost significantly.  For example, a “V” style engine has 2 heads and it is best to replace the gasket on both so the cost increases significantly over an inline engine.  Similarly, an engine with overhead cams adds the complexity of removing the timing belt or chain which makes the job more complicated than it would be on a pushrod engine where you simply need to remove the rockers and pushrods.  Machine work can add lots of cost to a head gasket job so knowing how much damage has been done to the head or block is important in calculating the cost of your head gasket repair.  Lastly, there are lots of other parts that can be replaced when repairing a head gasket like other gaskets and seals, belts, or the water pump and those parts costs can add up quickly as well.  For more information on calculating the head gasket repair costs for your car, check out our article on head gasket repair costs.

To quickly and permanently seal your blown head gasket, go to your local auto parts store and pick up one of BlueDevil’s head gasket sealing products.  If you have a small leak or 4 or 6 cylinder engine pick up BlueDevil Pour-N-Go 16oz Head Gasket Sealer.  Simply add it to your radiator and your head gasket leak will be sealed as your drive!  For larger leaks or 8 cylinder engines, use BlueDevil Head Gasket Sealer.  BlueDevil Head Gasket Sealer requires the removal of your vehicle’s thermostat and a complete cooling system flush but is guaranteed to fix your blown head gasket!

Don’t risk getting stranded or damaging your vehicle’s engine by driving with a blown head gasket.  Stop by your local auto part store today and pick up the quick and easy solution from BlueDevil!

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Pictures Provided By:

blown_head_gasket_symptoms.jpg – By Alex_Lshchenko – Licensed by Getty Images – Original Link
head_gasket.jpg – by Urfinguss – Licensed by Getty Images – Original Link

 

616 responses to "What Are the Symptoms of a Blown Head Gasket?"

616 Comments

  1. Jack Hunt on February 24, 2014 at 11:49 pm

    I tried your white label head gasket repair product on an external head gasket leak. I was unsuccessful in repairing the leak. Do you have any advice I should follow, or do I just need to go through the process of getting a refund? Thanks, Jack.

    • BlueDevil Pro on February 25, 2014 at 1:13 pm

      Jack,

      Please give our tech line a call at 1.888.863.0426 so we can determine the best steps to take.

      Thanks!

      • Jerald Shabi on June 22, 2015 at 9:05 pm

        My car has some white smoke but not noticeable but my car heats 3/4 to redline when accelerate or up a hill

        • BlueDevil Pro on June 23, 2015 at 11:43 am

          Jerald-

          Please contact our tech support team at 888-863-0426 so that we may discuss all of the symptoms you are experiencing. With further information we will be able to make the best recommendation to you.

          Thanks!

          -BDP

        • Julie on June 29, 2018 at 3:39 pm

          My car has all the symptoms of a blown head gasket for a 2001 Honda civic ls

          • BlueDevil Pro on July 2, 2018 at 9:00 am

            Julie-

            As long as you are not losing water/coolant too quickly, and the vehicle is able to maintain idle for a full 50 minutes, without overheating or stalling out, you would be a great candidate for the BlueDevil Head Gasket Sealer. Feel free to contact our technical support line at 888-863-0426 with any questions.

            Thank you!

            -BDP



        • Justice on May 24, 2020 at 6:23 pm

          i have a question white. Smoke from. Pipe can i still u devil sealer

          • BlueDevil Pro on May 26, 2020 at 9:46 am

            Justice-

            White smoke coming out of the tail pipe would be a tell-tale sign of a blown head gasket. 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



      • Markina on July 26, 2015 at 12:49 pm

        I have a 1998 mercury grand marquis overheating, taking a half of jug of coolant a day. My oil is clear, no smoke or water leakage coming from my exhaust pipe and theres no water on the ground. I have a new thermostat, coolant jug and flush but no luck. The overheating is getting worst. Could this be a head gasket problem? If so, which one of your products do you recommend?

        • BlueDevil Pro on August 3, 2015 at 3:10 pm

          Markina-

          Yes, it is likely a head gasket issue that you experiencing. We recommend using the BlueDevil Head Gasket Sealer.

          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. BlueDevil will create a permanent seal.

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

          Thanks!

          -BDP

          • Carl on October 31, 2015 at 1:23 pm

            I have a 96 mercury Sable no leaks on the ground, no milky substance, but there was a Lil white smoke not much after starting up after sitting for a couple months but cleared up no smoke at all now, but after driving the car for 15, to 20 min., it’s over heating coolant was low, topped off but like it stay at the same coolant level but while driving turn on heater n it seems to cool the car down…could this be head Gasket problem if so what product could I use or what do u suggest…please help thank u in advance



          • BlueDevil Pro on November 6, 2015 at 11:10 am

            Carl,

            Thanks for your question about your 1996 Mercury Sable. If your white smoke stopped and you don’t have milky oil it could simply be that your cooling system needs to be refreshed as you may have a clogged heater core or rust in your system. We would recommend using Blue Devil Radiator Flush (available here: http://store.gobdp.com/radiator-flush-00204/) to clean our your cooling system. Then add new coolant and replace your thermostat and see if that gets your operating temperature and heater back to normal.

            Thanks for your question!
            -BD Auto Pro



          • JamesLawrence on February 16, 2016 at 11:37 am

            If my van is over heating during this do I turn it off



          • BlueDevil Pro on February 16, 2016 at 1:27 pm

            James-

            If the vehicle starts to overheat it should be shut down. Normally, if a vehicle overheats prior to the recommended 50 minute idle being complete, it is an indication that the vehicle may have a leak that is larger than what BlueDevil is intended to fix.

            Thank you!

            -BDP



          • Gary on August 21, 2021 at 7:47 am

            Ah, yeah, but it is important to mention that you need to setup the removed plug and coil pack connection to fire to ground while running the car for the 50 minutes…the 20-40 thousand volts coming from the disconnected plug WILL blow your coil pack on that wire and potentially blow the ECM computer driver for that plug!!! How do I know? Trust me it just happened!!!



        • chris p on June 11, 2016 at 11:09 pm

          either that or a leaking gasket on thermostat, or more likely, the water pump

          • Donald Jost on July 15, 2021 at 3:12 pm

            I have a 1985 Toyota van doesn’t leak in the radiator does not leak in the water pump does not leak in the big hoses from the radiator but now I have a leak in the back of the motor to 4 cylinder I do not have I do not have antifreeze in the oil can you help me with this and tell me what it is it’s leaking from the back of the motor thank



          • BlueDevil Pro on July 15, 2021 at 3:40 pm

            Donald-

            Thank you for asking about your Toyota. To confirm, are you losing antifreeze or oil? 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



        • MBR on March 23, 2017 at 5:16 pm

          Tbh,it sounds like your intake manifold could be the culprit. The 4.6 Ford’s Achilles heel.

        • James Connelly on August 13, 2017 at 3:30 pm

          You have s cracked intake manifold, very common on that vehicle

        • Debbie on May 14, 2018 at 4:12 pm

          that’s how mine started out and then all the sudden boom head gasket blown it’s on its way to blow go get the sealant ASAP

          • Rachel on January 25, 2023 at 1:13 pm

            Can there be any other reason s lil fluid to come out the tail pipe like I bottomed out and the tail pipe was hanging lose got along time got it welded up n then seen few wet spots one time at the tail pipe



          • BlueDevil Pro on January 25, 2023 at 4:59 pm

            Rachel-

            Did you notice the fluid while the vehicle was running or after the vehicle had been run and the engine completely cooled? If it was the latter, this would be normal. If you noticed it with the vehicle running, please contact our technical support line at 888-863-0426 for further assistance.

            Thank you!

            -BDP



        • Danny on August 16, 2021 at 4:45 pm

          I have a 2003 buick century I had a leak and it overheated real bad I drove it home about 6 to 8 miles pulling off and letting it cool down several times got leaked fixed no signs of blown head gasket do you think it is OK car is not overheating yet

          • BlueDevil Pro on August 16, 2021 at 5:03 pm

            Danny-

            Thank you for asking about your Buick Century. If you are not noticing any symptoms currently, you should be good to go. Only time will tell if the original overheating caused any internal damage that is detrimental to the vehicle’s ability to run properly. We recommend road testing it a few times in short trips, around the block, to see if any issues arise.

            Thank you!

            -BDP



      • BlueDevil Pro on August 17, 2015 at 8:59 am

        Yes, the BlueDevil Head Gasket Sealer will still work when 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 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.

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

        Thanks!

        -BDP

        • April on October 13, 2017 at 1:18 pm

          I have a 2007 Hyundai Santa Fe with 165,000+ miles on it. It does not seem to be overheating, but, yesterday as I was driving the A/c suddenly started blowing warm air and smelled kind of sweet. I turned it off and kept driving. I picked my daughter up from school and when I started the car it made a loud funky sound, but started. Driving home 1 1/2 miles, white smoke started coming out from under the hood. (A LOT of smoke). When I got home I lifted the hood and there was a thick beige/chocolately colored liquid splashed all over the top of my engine and on my fan and it had a sweet smell to it. Could this be a blown head gasket? There was a LOT of smoke. Would this also cause the A/C to blow warm?

          • BlueDevil Pro on October 13, 2017 at 2:05 pm

            April-

            Thank you for asking about your Hyundai Santa Fe. Typically, the A/C blowing warm air would not be related to an antifreeze leak. Have you inspected the oil to see if water/coolant is getting in there? Based on your description, it is possible that it is a head gasket leak you are dealing with, however, it is not positively the case. You may want to have the vehicle looked at by a certified ASE mechanic for a proper diagnosis.

            Thank you!

            -BDP



        • Carl on January 10, 2018 at 11:22 pm

          Hi,
          I have a 2004 Grand Am with the 3.4L V6. It is getting combustion/exhaust gases blowing into the cooling system and creating pressure which then spills all over the garage floor. I can pull and inspect the plugs and do the above mentioned with leaving that plug out. My question is, will the 16 oz. pour and go do the trick, or do you think I need to pull the thermostat and flush it and use the higher strength stuff? I’m hoping not to have to pull the thermostat as it is almost as big of a job to do that as it would be to replace the entire head gasket.
          Thanks

          • BlueDevil Pro on January 11, 2018 at 9:30 am

            Carl-

            Thank you for asking about your Pontiac Grand Am. A clean, free-flowing system is vital to having success using either of our Head Gasket Sealers. When combustion/exhaust gases are present in the cooling system, the system is being over-pressurized and the circulation of water/coolant is being restricted. For best overall results, we do recommend the BlueDevil Head Gasket Sealer (32 oz. yellow label), which requires the removal of the thermostat and a cooling system flush prior to use. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



          • Mbekezeli on May 10, 2022 at 2:32 pm

            I have vw blue line and the thermostat bis new but it loosing power from from there water level is going hgh as soon as it happens it starts boiling



          • BlueDevil Pro on May 11, 2022 at 8:02 am

            Mbekezeli-

            It’s possible you have an air pocket trapped in the system. Try bleeding it to get rid of the excess air. You can idle the vehicle for 15-20 minutes, with the radiator cap off, and allow it to boil/bubble out, then top it off from there.

            Thank you!

            -BDP



        • adam on August 2, 2018 at 3:35 pm

          What!? This could result in a fire if you don’t disconnect the injector to the plug.

        • Peggy Russell on January 23, 2019 at 9:17 am

          I have a 99 Ford f150 4.6withthe bubbles in the reservoir but now won’t start to use the blue devil sealer what can I do??

          • BlueDevil Pro on January 23, 2019 at 11:51 am

            Peggy-

            Thank you for asking about your Ford F-150. 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 you can get the vehicle started, it would be worth while to move forward using the product.
            It is 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



      • William on October 27, 2015 at 1:45 pm

        How do I know when my car head gasket is bad?

        • BlueDevil Pro on October 27, 2015 at 3:45 pm

          William-

          Generally, the more quickly you lose antifreeze the worse the head gasket has become. Many times you will notice heavy steam out of the tailpipe, milkiness in your engine oil, or overheating. It will usually become very clear when a head gasket is severe.

          Thank you!

          -BDP

          • aia on October 30, 2015 at 6:29 pm

            that exactly what I found in my engine when I had a bad head gasket , milkiness in my engine oil, overheating.



      • Reba on December 3, 2015 at 6:59 pm

        I have a 2002 Windstar Van. Started leaking coolant really bad
        We tried the kW Head gasket and Block repair. Flush the system and did everything by the instructions and didn’t work. Now the stream is bigger than ever. Already spent close to $90 dollars there is oil getting into the coolant. But as far as we can tell is not getting into oil. Any suggestion that will work?

        • BlueDevil Pro on December 10, 2015 at 12:41 pm

          Reba-

          Unfortunately, based on your description it sounds like the leak has gotten to a point that is too large for what BlueDevil is intended and designed to fix.

          We recommend taking the vehicle in to a certified mechanic to be looked at and potentially repaired. The only solution may be hard part repair due to how large the leak has become and the fact that oil is entering the cooling system.

          Thank you!

          -BDP

      • Scott on January 25, 2016 at 10:02 pm

        I have oil in my radiator is this do to a blown head gasket and will blue devil work on it

        • BlueDevil Pro on January 26, 2016 at 9:15 am

          Scott-

          Thank you for your question. The BlueDevil Head Gasket Sealer is only intended for water/coolant leaks. Unfortunately, we do not manufacture a product for stopping oil leaks into the radiator. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

          • Erick on March 26, 2019 at 9:57 am

            Hello I have an 05 honda civic that I had just bought ..when I bought it everything great but a few days later I noticed that it didn’t had coolant or anything and then I added a bit of water just to clean the inside and then tried flsuhing it but the water wouldn’t come out from the bottom of the radiator what can this be ??????



          • BlueDevil Pro on March 26, 2019 at 1:17 pm

            Erick-

            Thank you for asking about your Honda Civic. Was the vehicle overheating at all? 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



      • julie on June 15, 2016 at 9:48 am

        I have a 2006 chevy equinox that keeps overheating. Have put in a brand new thermostat and flushed the radiator and it still continues to overheat. Could it be a blown head gasket

        • BlueDevil Pro on June 16, 2016 at 9:43 am

          Julie-

          Thank you for asking about your Chevy Equinox. Based on your description, it is tough to say whether the vehicle is overheating because of a blown head gasket. We recommend taking the vehicle to a certified ASE mechanic and having the vehicle properly diagnosed.

          Thank you!

          -BDP

      • Simon on March 15, 2017 at 4:17 am

        I have a 1007 e420 smooth idle lots of power..no milky oil no moisture in the exhaust or spark plugs…it overheats..the expansion tank sounds loud and violent…it takes quite a long time for it to overheat but it does every time…both fans come on at extremely high speeds and im not sure about the fan clutch..I have not done a compression test yet but even boiling over from the expansion tank it smooth acceleration and no smoke of any kind..the top radiator hose gets very hot and very pressurized but the bottom hose on the expansion to radiator is cool to the touch..I do not understand how the tank can boil but the hose that delivers the water to the radiator stays cool…it does not seem to be getting heat …no leaks and again at idle it takes 46 to 50 mins to get so hot I have to cut it off…does it sound like a head gasket or a thermostat or water pump or fan clutch ?…that is what I have narrowed it down to…thank you for any help.

        • BlueDevil Pro on March 15, 2017 at 10:18 am

          Simon-

          Thank you for asking about your Mercedes Benz E420. Based on your description, it sounds like it is possibly a faulty thermostat or water pump. The fact that you are not noticing a water/coolant leak, would lead us to believe that it is not a head gasket issue. You can check the thermostat first to make sure it is opening and closing at the proper temperature. If not, replacing the thermostat should correct the problem. If it is, you may want to bring the vehicle to a shop for a possible water pump replacement.

          Thank you!

          -BDP

          • Rahim on December 8, 2021 at 4:27 pm

            My 2010 Astra j 1.4 turbo the coolant light came on today but went off 10 seconds later the mechanic told me my head gasket is weak so I was driving around without my thermostat but now I’ve put it back in because it cools down too quick

            Please could you give me a response

            Thanks



          • BlueDevil Pro on December 9, 2021 at 8:40 am

            Rahim-

            Thank you for asking about your Astra J. Did you have to add coolant for the light to go off? 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



      • Rashad Obryant on October 9, 2017 at 11:32 am

        Blue Devil, my car was running hot and smoke was coming from the car and it was leaking oil. The smoke was coming from the hood and I even added coolant and oil stabilizer and oil to the engine. It also had a really bad rattling sound when I hit the accelerator and now it has an oil leak

        • BlueDevil Pro on October 9, 2017 at 1:14 pm

          Rashad-

          Is water/coolant getting into the engine oil? The BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) would be able to stop the coolant loss you are experiencing, however, it would not be able to stop an oil leak coming from the head gasket, if that is indeed where the oil leak is coming from. Have you had the vehicle diagnosed? 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

        • Stephanie on December 3, 2017 at 3:52 pm

          I have 2007 suzuki forenza it leaks oil from around valve gasket we had it replaced with a new valve gasket kit .them it started smoking white smoke and running hot .What can I do to stop the leak and smoking

          • BlueDevil Pro on December 5, 2017 at 9:07 am

            Stephanie-

            Thank you for asking about your Suzuki Forenza. White smoke would be an indication that water/antifreeze is burning, where as blue smoke would indicate oil burning. Are you losing antifreeze and oil as well? 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



      • David Martin Sr. on January 20, 2018 at 7:18 pm

        I have a 1997 Ford 7.3 diesel F-250 and it has gotten where it will run good when it is cold for around 5-7 miles and then it starts jerking and smoking grey, white and black smoke, and then it will quit running, and as soon as it cools down then it runs good for another 5-7 miles, and then it does it all over again, there is no water in my oil, or oil in my water and as long as it is cool, then it does not smoke and runs good, it did not loose power except when the heat guage gets up to medium.

        • BlueDevil Pro on January 22, 2018 at 10:09 am

          David-

          Thank you for asking about your Ford F-250 7.3 Diesel. In order to get the benefit of using the product, the vehicle would need to be able to idle for a full 50 minutes without overheating or stalling out, and you shouldn’t be losing more than about a quart of water/coolant during that 50 minute run. If you can meet those general guidelines, then you would be a great candidate for the BlueDevil Head Gasket Sealer (https://store.gobdp.com/head-gasket-sealer-38386/). 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

      • Brittany on April 25, 2019 at 9:42 pm

        I have a 2004 Toyota Corolla I got about a week ago. When I got the vehicle everything was fine the first day the second day gauge kept reading hot but engine didn’t seem to be hot so I replaced the thermostat. Fixed my problem for about 3 to 4 days. Then my check engine light was on so I got it tested and it came back that the number 2 cylinder coil was misfiring so I replaced plug n coil. Engine sounded way better and there was no misfire. I let vehicle ide for awhile maybe 30 mins or so and the gauge starting reading hot but yet raditr cap and engine n components are cool. Heater wouldn’t work. I let engine cool about 2 hours and opened radiator and topped of with water. (Which for some reason seemed to be halfway gone) then I left engine idle to make sure all components were filed with water before putting cap back on. Once water level was full I replaced cap and let the engine idle for another 15 mins. After the 15 mins white smoke starts to come out the tailpipe(no smoke whatsever before hand) I turned car off and drunk it back up. This time the muffler seems to have small air sounding pockets coming about every 2 to 3 seconds and a bunch of white smoke is coming out. The check engine light started blinking for a few seconds and then remained solid. I need some help have had vehicle for a week tomorrow(friday) and I pay notes on it!!!!

        • BlueDevil Pro on April 26, 2019 at 9:19 am

          Brittany-

          Thank you for asking about your Toyota Corolla. Did you purchase an extended warranty? If so, it would be worth it to bring the vehicle into a shop for a proper diagnosis and remedy. Based on your description, it is 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

      • Mathias on July 12, 2019 at 10:13 am

        My car is Saturn 2000 it overheat within 10mins of idleness does it mean I will need to change my head gasket
        Can’t a head gasket be doubled thank u

        • BlueDevil Pro on July 12, 2019 at 11:39 am

          Mathias-

          Thank you for asking about your Saturn. A vehicle can over heat for a number of different reasons, some are not even related to the head gaskets. Have you noticed a loss of water/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

          • Heather on July 31, 2019 at 7:23 pm

            I have a 1997 Jeep Cherokee. It overheats at idle but cools down when driving. I took the thermostat out to allow constant water flow. The only symptom I have of a head gasket issue is bubbles in the overflow tank if it gets hot. There’s no smoking, no discoloration on the oil etc. Thoughts?



          • BD Auto Pro on August 1, 2019 at 12:35 am

            Heather,

            Thanks for your question about your 1997 Jeep Cherokee. Usually, to diagnose a blown head gasket you want to have more than 1 symptom. It’s certainly possible that you’ve got bubbles in the overflow tank due to a bad radiator cap or air in your system. We would recommend checking your radiator cap to make sure it is keeping the system under pressure and also checking the function of your cooling fan and shroud to make sure it is properly moving air through the radiator.

            Thanks again for your question!
            -BD Auto Pro



      • Cynthia Garcia on August 1, 2019 at 4:16 am

        I have a dodge neon 05 and it doesn’t leak or smoke or nothing but it overheats usually when it’s slow traffic or on stops. What can it be? Can the head gasket be blown?

        • BlueDevil Pro on August 1, 2019 at 8:59 am

          Cynthia-

          Thank you for asking about your Dodge Neon. Based on your description, it does not necessarily sound like the overheating issue you’re having is head gasket related. Unfortunately, a vehicle can overheat for a number of different reasons. If you are not seeing a leak or noticing a loss of water/coolant, the best place to start would check to see that the thermostat is functioning properly. A thermostat that is stuck closed would cause the vehicle to start overheating. You can remove it and place it in boiling water to make sure it is opening up at the proper temperature. If the problem persists, you may want to bring the vehicle into a certified ASE mechanic for a proper diagnosis.

          Thank you!

          -BDP

          • Nicole on March 12, 2022 at 5:57 am

            I have a 2005 dodge grand caravan and it has all the signs of blown head gasket. what should I do?



          • BlueDevil Pro on March 14, 2022 at 9:21 am

            Nicole-

            Thank you for asking about your Dodge Grand Caravan. 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



    • Fig on December 18, 2014 at 2:41 pm

      Car never overheated or no white smoke or milky white substance in oil. Radiator hose popped off of radiator breaking connection on radiator. Radiator replaced and thermostat for good measure. Coolant system filled and air bled. While running car the with overflow cap on, hose got hard, build up of pressure and blew my cabin heater coil. Is this a head gasket issue and which one of your products would work to seal it?

      • BlueDevil Pro on December 19, 2014 at 10:18 am

        Fig-

        It sounds like the vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. We would recommend using the BlueDevil Head Gasket Sealer.

        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. 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 at 888-863-0426 with any questions.

        Thanks,

        BDP

        • Fig on December 19, 2014 at 6:49 pm

          Thank you for the response.

    • SAHADEV KUMAR on December 20, 2014 at 8:17 am

      IN A DIESEL ENGINE I SAW HUGE BLACK SMOKE .LOT OF WATER LEAKAGING NEAR HEAD GASKET. SOME TIME LATER ENGINE SLOWELY DOWN AND FINELY STOPED,WHAT IS THE REASON?

      • BlueDevil Pro on December 29, 2014 at 11:23 am

        Sahadev-

        It sounds like you have an imbalance in the air to fuel ratio – too much fuel to not enough air. This means either too much fuel is being added to the mix or there’s not enough oxygen being supplied to burn the fuel.

        The most common causes of this are faulty injectors, a faulty injector pump, a bad air filter (causing not enough oxygen to be supplied), a bad EGR valve (causing the valves to clog) or even a bad turbocharger. Some of these are easy fixes while others may require you to visit a certified mechanic. We hope this helps.

        -BDP

    • LORRAINE on October 17, 2015 at 9:31 am

      Ok.I added a new oil sendind unit to my car(2000 Malibu). Now Iam adding coolant to my car every week. What seems to be the problem?

      • BlueDevil Pro on October 24, 2015 at 10:15 am

        Lorraine,

        Thanks for your question about your 2000 Malibu. We would recommend trying to identify where the coolant is leaking. Our leak stop products cannot seal a leak in a bad hose so if you can find the leak coming from a hose, we would recommend simply replacing that hose. If you find the leak coming from a gasket, the radiator or engine block you can use BlueDevil Radiator and Block Sealer (available here: http://store.gobdp.com/radiator-block-sealer-00205/) to seal the leak.

        Thanks again for your question!
        -BD Auto Pro

    • Neuda on October 24, 2015 at 6:55 am

      Hi I have a 93 honda prelude car doesn’t over heat. But I’m losing alot of coolant and adding alot of coolant every other day. and the reservoir tank completely empty. Under the car shows alot of coolant but it drys up never hits the ground no white smoke from exhaust pipe no signs of oil in the radiator or under the cap. Could it be head gasket?

      • BlueDevil Pro on October 31, 2015 at 11:50 am

        Neuda,

        Thanks for your question about your Honda Prelude. The leak you’re describing could be an external head gasket leak meaning the water is leaking out of the head gasket rather than into your engine’s cylinders. Usually, if this is the case you’ll notice steam coming from the head after driving for more than 10 minutes. If this is the case, we’d recommend using BlueDevil Pour-N-Go (available here: http://store.gobdp.com/pour-n-go-head-gasket-sealer-00209/) to seal the leak.

        It is also possible that the leak is coming from one of your hoses so it may be worth checking the condition of your radiator hoses and the hoses going to your heat core.

        Thanks again for your question!
        -BD Auto Pro

    • chasty rucks on October 30, 2015 at 6:02 pm

      there is white smoke coming from under the hood an it jerks an sputters an dies an i dont know what is wrong with my van its a 99 murcury villager

      • BlueDevil Pro on November 6, 2015 at 10:57 am

        Chasty,

        It sounds like you’ve got a big coolant leak and possibly some other problems. Your car probably is not safe to drive the way it is so we would recommend having it towed to a mechanic for a diagnosis. If you decide to do the work yourself, we would recommend letting the car cool all the way down, popping the hood, then starting it and seeing if you can find the coolant leak quickly. If you can get that fixed quickly, you may be able to have better luck diagnosing the rest of the problems you’re having.

        Thanks for your question!
        -BD Auto Pro

        • Jan on October 18, 2020 at 2:05 am

          I have 1995″Mercedes 220 . Overheat when I pull a small caravan.

          • BlueDevil Pro on October 19, 2020 at 8:50 am

            Jan-

            Thank you for asking about your Mercedes 220. Have you noticed any white smoke/steam coming from the exhaust pipe or water getting into your engine oil? Are you noticing any issues when not putting the engine under load? 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



    • Ian on May 28, 2016 at 8:25 pm

      Hello,

      I’ve witnessed the following symptoms with my engine:

      -an overheating engine
      -significant loss of cool with identifiable leak

      No:
      – coolant leaking externally from bellow the exhaust manifold
      -milky white discharge in my motor oil (not a lick),
      -white smoke from the exhaust pipe
      -bubbles in the radiator or coolant overflow tank

      will this product be able to solve the following problems?

      • BlueDevil Pro on May 31, 2016 at 2:29 pm

        Ian-

        As long as the vehicle will idle for a full 50 minutes without overheating or stalling out and will not lose more than about 1 US quart of water during a 50 minute idle then there is a great chance that BlueDevil Head Gasket Sealer will work.

        Thank you!

        -BDP

    • Joe white on July 31, 2016 at 9:23 pm

      I have a 02 Dodge Ram 1500 with 97,000 miles on it and it’s been a good truck up until now. I first noticed it lacking power. Then came the check engine light. Now 3 days later I noticed a lot of white smoke and it running extremely rough! So I’m almost certain that’s it’s the head gasket… Thoughts…?

      • BlueDevil Pro on August 4, 2016 at 11:19 am

        Joe-

        Thank you for asking about your Dodge Ram 1500. It sounds like the 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 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

        • Hexg on November 3, 2018 at 8:10 am

          I was wondering if I should do the same. I have a 2003 Dakota with a 4.7 v8 and mine has milky oil, combustion in coolant, white smoke, and overheats pretty quickly now. All this came about in about a 25 mile time frame. Not all 25 miles at once either. Probably about 5 miles at a time because I was testing it. All of a sudden though the white smoke got rediculous so I parked it. Been parked for about 2 weeks now. Just needing some (before) rebuild advise. Thanks

          • BlueDevil Pro on November 5, 2018 at 10:55 am

            Hexg-

            Thank you for asking about your Dodge Dakota. Based on your description, yes, the recommendation would be the same. You would want to remove the spark plug from the affected cylinder to reduce the amount of pressure building up, thus allowing the product the best chance of circulating and sealing properly. In addition, you would also want to change the oil before and after the BlueDevil procedure.

            Thank you!

            -BDP



    • Rosalinda cade on August 30, 2016 at 8:35 am

      I have a 1998 ford expedition will this product work for my truck aswell???

      • BlueDevil Pro on August 30, 2016 at 9:10 am

        Rosalinda-

        Yes, the BlueDevil Head Gasket Sealer is compatible for use in your Ford Expedition. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

    • Kathy on November 24, 2016 at 11:43 am

      Some one put some blueDevil in to my antifreeze and now my engine light is on what damage did I do to my motor

      • BlueDevil Pro on November 29, 2016 at 9:34 am

        Kathy-

        What were the symptoms your vehicle was 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

    • Christy Banks on July 15, 2018 at 5:43 pm

      I have a 2012chevy equinox that has white smoke coming from the tailpipe and oil dripping on the belt please help me find out what this problem may be .

      • BlueDevil Pro on July 16, 2018 at 8:22 am

        Christy-

        It sounds like you may have multiple leaks going on with your Chevy. Please contact us at 888-863-0426 so that we discuss some possible options in getting the leaks repaired.

        Thank you!

        -BDP

    • Tony on January 16, 2023 at 8:26 pm

      Used it try and fix my 2006 Volkswagen Jetta tdi 2.0t diesel seemed to work properly but when I decided to test drive it it felt as if It was sputtering so I turned around to head back home due to feeling unsafe it proceeded to shut off and hasn’t started since any thoughts?

      • BlueDevil Pro on January 17, 2023 at 8:25 am

        Tony-

        Thank you for asking about your Volkswagen Jetta. Are you still noticing a loss of water/coolant? The product wouldn’t instantaneously seal, so you still would have lost a little water/coolant during the 50-minute run. Feel free to contact our technical support line at 888-863-0426 for further assistance.

        Thank you!

        -BDP

  2. jesse carlozzi on April 5, 2014 at 10:14 pm

    What if I didn’t run my heater the whole time? Will that cause issues?

    • BlueDevil Pro on April 7, 2014 at 2:53 pm

      As long as your vehicle didn’t overheat their shouldn’t be any problems.

      Feel free to call Tech Support at 1.888.863.0426 if you have any other questions.

  3. christopher sandoval on April 14, 2014 at 12:29 pm

    What if your car overheats during pour and go process

    • BlueDevil Pro on April 14, 2014 at 4:32 pm

      Your car needs to be able to idle for 50 minutes without overheating to complete the installation. Please call our tech line at 1.888.863.0426 for assistance.

  4. Tarrence Robinson on July 4, 2014 at 12:59 am

    If the car over before the process will it not work if u try it again a little later

    • BlueDevil Pro on July 8, 2014 at 1:05 pm

      You must be able to maintain a 50 minute idle for the product to work correctly. If you need further assistance please give our tech line a call at 1.888.863.0426.

      -BDP

  5. Keith on August 1, 2014 at 2:11 am

    Ford 2006 F-250 turbo diesel that is loosing coolant antifreeze maybe 2-3 cups per 200 miles but pulling a 5th wheel camper. does not overheat but I am concerned of a head gasket problem?

    • BlueDevil Pro on August 6, 2014 at 5:41 pm

      The leak could be coming from anywhere within the cooling system. I would diagnose the issue as a head gasket leak prior to installation but, if you are definitely loosing coolant, BlueDevil Head Gasket Sealer would be the appropriate product.

    • lucasl on January 19, 2015 at 5:56 pm

      Only sign is I did a oil change and came out lookin like chocolate milk what does that mean is my head gasket blown

      • BlueDevil Pro on January 20, 2015 at 9:24 am

        Lucas-

        Yes, it sounds like you have a blown head gasket. We recommend using the BlueDevil Head Gasket Sealer. To ensure best results you should change your oil before and after the BlueDevil process.

        -BDP

    • FLOYD FEATHERSTON on November 12, 2019 at 12:49 am

      I have a 1994 Mazda 626 ; no white smoke;no water in oil; but oil is in radiator; oil level constantly goes down.

      • BlueDevil Pro on November 12, 2019 at 10:05 am

        Floyd-

        Thank you for asking about your Mazda 626. Unfortunately, we do not manufacture a product intended to stop oil from getting into the radiator. A hard part repair may be your best option.

        Thank you!

        -BDP

  6. Keith on August 1, 2014 at 2:12 am

    do I have to remove the thermostat and why?

    • BlueDevil Pro on August 6, 2014 at 5:42 pm

      Yes, to create a free flowing system.

      -BDP

      • jeffrey on August 13, 2014 at 3:31 am

        toyota 2e engine already removed thermostat. yet, still fast to get heatened.pls help what to do.

        • BlueDevil Pro on August 20, 2014 at 2:31 pm

          Jeffrey,

          Please contact our technical support team at 888-863-0426 so that we may assist you further.

          -BDP

  7. CAT5 on August 3, 2014 at 2:46 pm

    To continue waiting on your response and maybe not related but puzzling, I live in Miami, Fl. and we seldom use the heater, if ever. In trying to adjust idle problem, I tried tweaking and adjusting the Throttle Position Sensor but had no success in many attempts. I then tried turning on the heater and let it run for a few minutes at 1200 RPM. The idle was fluctuating. The engine started bucking and jerking. Saw smoke rising from the engine that smelled of something burnt… Then, then, then the engine started smoothing out and started idling much better and not wanting to die out.

    ??? How can turning on the heater do this? Trapped air bubbles??? WHAT???

    Cat5

    • BlueDevil Pro on August 6, 2014 at 5:49 pm

      I would advise taking your car to someone certified that can look under the hood… It seems like you have more things going on then normal it would be difficult to diagnose online.

      -BDP

  8. Alisha on August 5, 2014 at 12:54 am

    Radiator hose breaks how quick can the head crack?

    • BlueDevil Pro on August 6, 2014 at 5:52 pm

      We need some more information to answer this properly. Click here to submit your question to our mechanic.

      -BDP

      • walter on September 10, 2015 at 1:24 am

        My car overheats but needle only goes a lil over half on gauge. No smoke no water in oil. Maybe every 2days have to add water to radiator. What seems to be problem?

        • BlueDevil Pro on September 10, 2015 at 9:34 am

          Walter-

          It is very possible that you have a blown/leaking head gasket. The fact that you are losing coolant says that there is definitely a leak within your cooling system whether it be a bad head gasket, leaking heater core, leaking freeze plug(s), or a cracked block.

          We recommend adding the proper amount of the BlueDevil Head Gasket Sealer. This will help stop the coolant loss and in turn prevent your vehicle from overheating.

          Thank You!

          -BDP

  9. PJ on August 6, 2014 at 7:23 am

    I was driving my car quite a lot today and when I turned it off I could head bubbling in my radiator. Also I noticed that there was a thin line of liquid along the front of my engine between the cylinder head and block. My coolant level has been reducing slightly over the past few months and I always top it up. There isn’t any white smoke from the exhaust or doesn’t appear to be an cloudiness in the oil. Do you think this is a head gasket problem? Is bluedevil a solution to this problem. Thanks

    • BlueDevil Pro on August 6, 2014 at 5:55 pm

      If you losing coolant, BlueDevil Head Gasket Sealer would be the appropriate product for your situation.

      -BDP

  10. Nicole on August 9, 2014 at 6:54 pm

    Long story short- radiator blew 3 years ago. Put a stop leak in (don’t remember what kind). Replaced radiator. Overheated die to blown hoses. Replaced hoses. Overheated again. Noticed that coolant had what looked like oil on radiator cap. Replaced blown hose and flushed system. Problem seemed fixed, until yet another hose blew. Sludge came back. Seems to be symptom of blown head gasket, but no white smoke from trail pipe, no overheating, no coolant loss, and no bubbles in overflow. Cause of the problem? 97 civic. No coolant in oil. Suggestions?

    • BlueDevil Pro on August 19, 2014 at 5:36 pm

      Nicole-

      It sounds like you are getting oil pushed into the coolant. The BlueDevil Head Gasket Sealer is made specifically for coolant leaks. Unfortunately, we do not manufacture a product that will stop oil from entering the coolant.

  11. mike on August 19, 2014 at 1:34 am

    I have a 2005 ford f350 6.0 diesel I already replaced the STY headbolt with studs. I am getting pressure which is causing puking only under high boost. I have checked pressure with a gauge and am sure it is coming thru my head gasket, will blue devil repair this problem as its pressure out of the combustion chamber into my coolant system?
    Thanks
    Mike

    • BlueDevil Pro on August 20, 2014 at 2:34 pm

      Mike-

      We would not recommend using the product in your Ford Diesel. In situations with a gasoline engine we would recommend pulling the spark plug from the effected cylinder to relieve some of the pressure blowing into the cooling system. However, because diesel engines use glow plugs you will be unable to use that method.

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

      • Joshua on May 21, 2015 at 3:42 pm

        All I have is a small coolant leak, I was moving my car at school and ran it on a cold start, what could be the cause to the leak? The leak is dripping somewhere under my Timing Belt, I have a 1991 Mazda Miata.

        • BlueDevil Pro on May 27, 2015 at 12:23 pm

          Joshua-

          It is likely that your water pump is leaking. You should first have the water pump check out and if it turns out it is not leaking then it is possibly a head gasket leak.

          If the Mazda is diagnosed with a head gasket leak then we recommend using 8 – 10 ounces of the BlueDevil Head Gasket Sealer.

          Feel free to contact our tech support team at 888-863-0426 with any further questions.

          -BDP

          • Barbara on October 30, 2015 at 1:00 pm

            I have a 2003 Montero Mitsubi tshi that is leaking coolant fast I have tried blue devil permanent sealer once should I have it done again. It stop but start back leaking about 3 weeks later thanks



          • BlueDevil Pro on October 31, 2015 at 12:30 pm

            Barbara,

            Thanks for your question about your Montero. We would recommend you try calling our technical support department at 888.863.0426 to give them the details of your leak so they can help you know where to go from here.

            Thanks again for your question!
            -BD Auto Pro



  12. Adrian Ramos on August 20, 2014 at 2:44 pm

    I have a 2004 Pontiac grand am it starts up up I think I have water leaking into my engine the oil is milky will this product still work???

    • BlueDevil Pro on August 21, 2014 at 6:46 pm

      Adrian,

      Yes, our product will work for the situation you described. I would change your oil before AND after the application.

      Please feel free to give our tech line a call if you have any questions. 1.888.863.0426

      -BDP

      • Adrian Ramos on August 21, 2014 at 10:38 pm

        Do I use the whole bottle or half

        • BlueDevil Pro on August 25, 2014 at 2:00 pm

          Adrian,

          Please give our tech line a call at 1.888.863.0426 so we can assist you. We need to know the size of your vehicle prior to giving a recommendation.

          -BDP

          • harold logins on October 16, 2015 at 3:14 pm

            I drive 30 miles to work and my temp. gauge moves about a 1/4 of an inch heat not as hot as it once was,when I get home the engine is hot, hoses are hard,every 2 or 3 weeks I have to add about a 1/2 quart of coolant, engine lite is on, reads temp. sensore which no one can locate could this be a head gasket problem thanks h.logins



          • BlueDevil Pro on October 24, 2015 at 10:00 am

            Harold,

            Thanks for your question. It’s possible that you’ve got a blown head gasket, but it sounds more like you’ve got a blocked heater core and maybe a slow leak because of that. We would recommend starting by performing a very thorough cooling system flush. Start by draining all the fluids and removing the thermostat. Remove the hoses going to your heater core and try forcing some water through using a garden hose. Try this both directions until the water flows through easily and comes out clear from both directions. Then use BlueDevil Radiator Flush (available here: http://store.gobdp.com/radiator-flush-00204/) to flush your cooling system. Replace your thermostat and refill the system with coolant and see if that gets your heat and operating temperature back to normal.

            Thanks again for your question!
            -BD Auto Pro



    • Larry budwell on August 18, 2021 at 3:01 am

      I just bought a 2005 Toyota camry le with the 2.4L and I have replaced the spark plugs and the 2 coilpacks that has been the original ones that came with the car and the other two have been replaced but I have bought the two new coilpacks and cylinder 2 and 3 are still misfiring would blue devil seal the head and get rid of the 2 misfiring cylinders or should I replace the headgasket and be done with it.

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

        Larry-

        Do you know if water/coolant is getting into the spark plugs or oil? Is the vehicle overheating at all? 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

        • Irene on September 8, 2021 at 3:48 am

          I have holden jackaroo wagon 1998 model it has water coming out of the exhaust pipe ,what does it mean?

          • BlueDevil Pro on September 8, 2021 at 9:14 am

            Irene-

            Thank you for asking about your Holden Jackaroo. Is the vehicle overheating at all? Is the water coming out of the exhaust pipe only while you are running the vehicle or is it after you have shut it off and the engine has cooled down? 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



  13. Melissa on August 22, 2014 at 9:46 pm

    I have a 2000 Olds bravado that I just bought. Noticed the other day that the coolant was leaking, my son added more coolant, leaked out again, seemed to overflow. My son replaced radiator, but still coolant leaks. Temp dial showed upwards of 260, drove it home, hood was hot, sounded thing things boiling, my son drained all coolant, then replaced radiator. Temp still very high, what should I do.

    • BlueDevil Pro on August 25, 2014 at 1:43 pm

      Melissa,

      Have you checked out this article? https://gobdp.com/blog/car-coolant-going/

      With what you’ve explained, You definitely have a leak somewhere else in your cooling system.

      -BDP

      • Austin on April 11, 2016 at 1:04 am

        Hey I have a 2004 Dodge Ram 1500 4.7L and it was running fine no problems but but the oil was milky and a mechanic recommended fiber lock to me so I bought it and added it and followed the directions but ever since my truck has been overheating. Why could that be!

        • BlueDevil Pro on April 12, 2016 at 9:16 am

          Austin-

          Thank you for asking about your Dodge Ram. Based on your description, the cooling system may be clogged or restricted with particles from the previous product you had used. We recommend having the cooling system flushed with our BlueDevil Radiator Flush, found here: http://store.gobdp.com/radiator-flush-00204/ . The Radiator Flush services systems up to 3 gallons, so you would need 2 bottles for your vehicle.

          Hope this helps!

          -BDP

  14. Janet Greene on August 30, 2014 at 3:13 pm

    My Jeep was towed to the automotive shop because it was overheating nine days later after they replaced the radiator.Prior to the radiator being replaced, I had a remanufactured air conditioner installed in my Jeep. While driving with the air conditioner on, my Jeep overheated and radiator fluid spilled all over the ground. I immediately parked it and turned off the engine. The tow truck driver said he did not find that the radiator had any leaks in it or even in the hoses. After my Jeep was at the shop for over 2 weeks, the shop told me they fixed the overheating problem with a sealant. How do I know if a gasket sealant was actually put in my Jeep Liberty? When the automotive shop picked me up in my vehicle, he did not have the air conditioner running and I asked why the air conditioner was not on, he said he liked to drive with the window opened. I reached over and turned on the air conditioner and the Jeep seamed to be running rough. By the time I dropped off the tech at his business and was driving home, the Jeep overheated. The automotive shop told me my vehicle was fixed with a sealant. The shop that has it now told me it overheated because of the fan was not working.

    • BlueDevil Pro on September 2, 2014 at 7:43 pm

      Janet-

      Depending on which product was possibly used it may be very difficult to determine whether or not a sealant was ever added to the system. Many of the products out there would not necessarily be traceable after application.

      Feel free to contact us with any further questions.