Repairing Your Cracked Engine Block

#driveyourlife

cracked engine blockHaving a cracked engine block can feel like the end of your vehicle’s life.  Engine swaps can be extremely expensive and often not worth the investment in your current vehicle.  Also, having a cracked block is one of those extreme cases where it may not be possible to salvage your current engine.

There are many who have attempted to repair cracked blocks.  The main difficult is that you cannot simply weld an engine block since it is made from cast iron, not steel.  It is possible to weld cast iron using an arc welder and the proper welding rods, but that often can cause deformation to your engine block, or leave the welded area far more brittle and susceptible to further cracking.  The other common attempt at fixing a cracked block is called cold metal stitching.  This process is similar to sewing two pieces of fabric together, except it is far more difficult with metal.  The main difficulty with this process is that it does not work well on components that experience drastic temperature changes as the temperature change causes swelling and shrinking of the metal which will cause the metal stitching to tear and the crack to reopen.  This process is also often prohibitively expensive and only used on very large or expensive motors such as heavy equipment, diesel engines or marine motors.

There have been a variety of other attempts at sealing cracked engine blocks like using cold welding products, 2 part epoxies or a variety of other patches and fixes.  The problem in most cases is the same as with cold metal stitching in that the wide range of operating temperatures in your vehicle’s motor along with the thermal expansion of the metal cause most repairs to only last for a short time.

Before you attempt any repair on your cracked engine block, you want to be sure that is the problem you have.  If you have an external crack in your block that you can see, then the problem is easily identified.  If you have an internal crack the symptoms can often be similar to that of a blown head gasket.  To determine if you have a blown head gasket, you can read our article about the symptoms of a blown head gasket.Cracked Engine Block

The best way to seal a cracked block is to use BlueDevil Radiator and Block Sealer.  BlueDevil Radiator and Block Sealer is a specially formulated sealing agent that you add to your vehicle’s cooling system.  BlueDevil Radiator and Block Sealer can seal your cracked block from the inside out through your vehicle’s cooling system.  It is not a fibrous or particulate sealer that can harm or clog any other areas of your cooling system.  Instead, BlueDevil Radiator and Block Sealer has a special chemical formula that will bond to the metal in your engine block at the leak point until the leak is completely sealed.  The chemical weld formed by BlueDevil Radiator and Block Sealer will create a permanent seal that can expand and contract with the temperature changes in your engine.  Since there is nothing harmful in BlueDevil Radiator and Block Sealer it can stay in your cooling system indefinitely sealing any future leaks your may have in your vehicle’s radiator or engine block.

00205_blocksealer

BlueDevil Radiator and Block sealer works so well, it comes with a guarantee of performance.  If you purchase it from BlueDevil or one of our partnering local auto parts stores we guarantee a permanent repair!

Since you’ve got nothing to lose, pick up BlueDevil Radiator and Block Sealer today!  You can purchase it directly from BlueDevil here.

Pictures provided by:

Cracked Block – By Nick Ares – Licensed by Creative Commons Share Alike 3.0 Via Flikr – Original Link

253 responses to "Repairing Your Cracked Engine Block"

253 Comments

  1. LEE on January 23, 2015 at 5:17 pm

    I used Blue Devil, on an 84 Buick 5.7 Diesel Engine that had either a cracked block or a blown head gasket, and it worked very well. Sealed the leak successfully and was very happy with the product. Company Technicians were very helpful and very interested in solving my problem. Wished I still had that vehicle, as it was an Estate Wagon, pretty rare with the Diesel engine !!

    • Duwaine hale on April 6, 2017 at 8:48 pm

      I got a crack head on buick will it help

      • BlueDevil Pro on April 7, 2017 at 9:01 am

        Duwaine-

        Yes, we recommend applying BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) to seal the cracked head.

        Thank you!

        -BDP

      • BlueDevil Pro on April 7, 2017 at 9:06 am

        Duwaine-

        Please contact our technical support line at 888-863-0426 so that we can get a better understanding of your Buick’s condition and be able to make any appropriate recommendations.

        Thank you!

        -BDP

    • Mildred Terrell on April 15, 2017 at 4:19 pm

      I have a crack in my engine will product work my truck

      • BlueDevil Pro on April 17, 2017 at 10:15 am

        Mildred-

        As long as the vehicle will maintain idle for a full 45 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant during that 45 minutes, you would be a great candidate for the BlueDevil Radiator & Block Sealer (http://store.gobdp.com/radiator-block-sealer-00205/).

        Thank you!

        -BDP

      • Evah on May 26, 2019 at 10:41 am

        My car has a cracked block so where can I get the blue devil products

        • BlueDevil Pro on May 28, 2019 at 10:04 am

          Evah-

          Where are you located? Please contact our technical support line at 888-863-0426 for further assistance.

          Thank you!

          -BDP

    • Chris on June 18, 2017 at 11:12 am

      How about on a 3.0 mercrusier

      • BlueDevil Pro on June 19, 2017 at 9:33 am

        Chris-

        Yes, the BlueDevil Radiator & Block Sealer is safe and compatible to use on your 3.0 Mercruiser. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

        • Jason on May 8, 2018 at 3:49 pm

          How do I run this in an inboard boat engine

          • BlueDevil Pro on May 9, 2018 at 8:34 am

            Jason-

            The key of the BlueDevil working is that you are able to circulate the same body of water for the recommended 50 minute idle; on a marine engine you could use a bucket or barrel to accomplish this. The other necessity is that the water will heat to at least 150 degrees during that run. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



        • Terry on April 4, 2019 at 7:21 pm

          Yes I have a 2000 Cadillac DTS 4.6 v8 and my oil and water is mixing and leaking from the bottom of the car. That means cracked head? Will this product work?

          • BlueDevil Pro on April 5, 2019 at 10:22 am

            Terry-

            Thank you for asking about your Cadillac DTS. Are you getting water/coolant back into the engine oil or oil into the radiator? 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



      • Jaedon on April 16, 2018 at 10:47 am

        If it causes further damage to my engine will I be compensated was told this was my only route and cheapest to fix my head gasket issue 1986 Dodge W250 Mopar 360

        • BlueDevil Pro on April 16, 2018 at 12:35 pm

          Jaedon-

          The BlueDevil Head Gasket Sealer does not contain any solid or particulate matter, so it is a non clogging product. It would not cause any further damage to an engine. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

          • Dillan Musonda on August 13, 2018 at 12:53 am

            Can the cracks on top of the engine block be sealed with blue devil?



          • BlueDevil Pro on August 14, 2018 at 8:45 am

            Dillan-

            Yes, BlueDevil will seal engine block cracks. As long as you are not losing water/coolant too quickly, the vehicle 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



          • Tony on July 22, 2021 at 1:44 am

            F 250 larait 2008 6.4 super diesel, they said cracked block, truck runs. Poured water in reservoir comes out of oil drain plug. Will blue devil help.



          • BlueDevil Pro on July 22, 2021 at 8:46 am

            Tony-

            Thank you for asking about your Ford F-250. Based on your description, it sounds as though you are losing water just as quickly as you add it. If that is the case, the leak would be larger than what the BlueDevil Head Gasket Sealer is intended for. A hard part repair may be your best option.

            Thank you!

            -BDP



      • Rick on July 12, 2018 at 9:03 pm

        Have you tried this yet Jason or Chris I have same problem. Could heat up metal barrel with propane torch or hot plate maybe ?. Then recirculate exhaust water with small pump back to intake tank.

    • Edith Jackson on March 1, 2018 at 11:37 am

      Is the dealership says that I have a crack in my ceiling and wall the 2016 Chevrolet Malibu can it be fixed or do I need another engine

      • BlueDevil Pro on March 1, 2018 at 2:35 pm

        Edith-

        Thank you for asking about your Chevrolet Malibu. Are you saying that there is a crack in the heads and the block? 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

    • Patrick Lawe on August 1, 2018 at 10:34 am

      Hi. I drive a 2003 Honda Civic. It has been reconditioned @ cost of $12,000 CA. Now I have been told there’s an internal crack in the engine block (by crank sensor). How can Blue Devil’s Radiator & Block Sealer work through the rad to fix an area where oil drips from? And I’m very concerned about what particles may be running through the system. You guarantee there will be no damage. Sure?

      • BlueDevil Pro on August 2, 2018 at 8:47 am

        Patrick-

        Thank you for asking about your Honda Civic. Unfortunately, we do not manufacture a product intended to stop oil dripping from the block. The BlueDevil Radiator & Block Sealer is only intend for water/coolant leaks, specifically, an external seep or a light drip coming from the radiator or block. Based on your description, a hard part repair may be your best option.

        Thank you!

        -BDP

    • Hasting on October 26, 2018 at 4:38 am

      I think my block is cracked. I have oil in my radiator with the water. Its leaking from the block. The block has no oil or water. Will I need to flush the oil/water out before I add this or while it is in then flush.

      • BlueDevil Pro on October 26, 2018 at 8:59 am

        Hasting-

        Unfortunately, we do not manufacture a product intended to stop oil from getting into the radiator. BlueDevil Radiator & Block Sealer is only intended for water/coolant leaks. Based on your description, a hard part repair may be your best option.

        Thank you!

        -BDP

    • Angela on April 28, 2019 at 6:55 am

      I have a 03 caravan, has blown/cracked head, blows white smoke and water from tailpipe, is it worth a shot to go buy some, will it seal it?

      • BlueDevil Pro on April 29, 2019 at 9:19 am

        Angela-

        Thank you for asking about your Caravan. As long as the vehicle can 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. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

    • Jon Jones on July 4, 2021 at 8:11 pm

      How exactly did you pour it? And how long wait?? And did it help for a while?
      My # is 8127092219

    • Frenk on July 28, 2021 at 3:00 am

      Hi I have 3s engine but block is have crak some place so it’s making me to use more engine oil than normal, can I find it and I will work, and how to use it I’m from Tanzania

      • BlueDevil Pro on July 28, 2021 at 8:18 am

        Frenk-

        The product we manufacture for oil leaks, BlueDevil Oil Stop Leak, is only intended for rubber seals/gaskets. Unfortunately, it would not have any effect on a metal component. Having the block replaced may be your best option.

        Thank you!

        -BDP

    • Raresapphires on August 6, 2021 at 11:29 pm

      Would this work on a GMC Bus that has a cracked block just below the manifold

      • BlueDevil Pro on August 9, 2021 at 8:22 am

        Raresapphires-

        Yes, the BlueDevil Head Gasket Sealer is safe and compatible to use on your GMC Bus. Be sure to follow the cooling system capacity table on the back of the bottle to ensure the proper amount of product is used. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

  2. Dave Andrson on March 26, 2015 at 2:42 pm

    Do you have some customers that have been successful with sealing a engine block that I could talk to? I have a straight six that has a crack, I would like to repair.

    • BlueDevil Pro on March 26, 2015 at 2:50 pm

      Dave-

      We have had multiple reports of the BlueDevil Radiator & Block Sealer successfully sealing a cracked/leaking engine block. We would be happy to discuss the product with & can be reached directly at 888-863-0426. We are available from 8:00 AM – 5:00 PM, Monday – Friday.

      Thank You!

      -BDP

      • Agustin boria on November 5, 2016 at 8:36 pm

        I have a 2007 odyssey with 148,000 miles it s been giving me multiples misfire took it to a specialist and they yold me that cylinder 5 is low presure it evaporates my coolant and its smells like coolant wen is warm they said i need to replace the motor it will be spencive

        • BlueDevil Pro on November 7, 2016 at 4:06 pm

          Agustin-

          Thank you for asking about your Honda Oddyssey. 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

    • J.S on December 3, 2017 at 2:04 am

      I have a Caterpillar C13 Peterbilt it’s leaking and I have done the head and gasket and had all attached components press tested but it still leaks and I don’t know where will Blue Devil work on a caterpillar engine or is it to much pressure

    • Jon Jones on July 4, 2021 at 8:12 pm

      Did you ever get the crack fixed?

  3. scott t on March 28, 2015 at 6:43 pm

    what about using it on a marine engine?

    • BlueDevil Pro on March 30, 2015 at 9:59 am

      Scott-

      Yes, the BlueDevil Head Gasket Sealer can be used in marine engines. The marine engine must be inboard for BlueDevil to work properly due to the fact that you need the same water to circulate for 50 minutes.

      Thank You!

      -BDP

      • Jonathan on June 11, 2015 at 7:21 pm

        Can it be used on an inboard/outboard by increasing the concentration of the product and recirculating using a tub to provide cooling water and catch the exhausted water?

        • BlueDevil Pro on June 12, 2015 at 2:18 pm

          Jonathan-

          As long as you are able to use a barrel/bucket to circulate the same water for the 50 minute idle. The main components you need are a combination of heat (at least 150 degrees) and circulation.

          Thank You!

          -BDP

        • Mac on July 3, 2015 at 1:35 pm

          Jonathon,

          How did it work for you on your marine engine?
          When recycling the same water, did you have temperature issues?

          I am in same boat, so to speak. I have an internal block crack that is g
          letting water into oil. I am trying to avoid replacing the engine.

          I look forward to your reply
          Mac

          • Troy on October 10, 2016 at 8:10 am

            I may habe the same issue and thinking of giving thos a shot. Anyone have success?



          • BlueDevil Pro on October 11, 2016 at 1:43 pm

            Troy-

            Feel free to contact our technical support line at 888-863-0426 if you have any questions or concerns.

            Thank you!

            -BDP



  4. Martin on April 5, 2015 at 12:13 am

    Can the radiator and block sealer be used on a marine engine? I think I have an internal Crack inside the block due to poor winterization.

    • BlueDevil Pro on April 6, 2015 at 12:30 pm

      Martin-

      Yes, the BlueDevil Radiator & Block Sealer can be used on marine engines; it must be an inboard motor.

      Thank You!

      -BDP

      • Martin on April 6, 2015 at 5:03 pm

        It is an inboard. 454 big block. Is there a mixture ratio that I need to follow. Since I will be circulating the same water out of a tank through the cooling system I wasn’t sure how many bottles I would need.

        • BlueDevil Pro on April 7, 2015 at 9:35 am

          Martin-

          Please contact us directly at 888-863-0426 and we will be happy to get a capacity chart to you or discuss it with you over the phone. If you purchase the 32 ounce BlueDevil Head Gasket Sealer, it does come with a capacity table printed on the bottle.

          Thank You!

          -BDP

          • Bart on February 14, 2017 at 1:15 pm

            I have a 110 Outboard that has water in the #4 Cylinder. Is this a product that I can use?



          • BlueDevil Pro on February 14, 2017 at 1:39 pm

            Bart-

            The BlueDevil Radiator & Block Sealer can only be used in outboard motors if you are able to circulate the same water for the 45 minute run; using a 5 gallon bucket would accomplish this.  The other need is that the water will heat to at least 150 degrees F. during that run. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



      • Larry on September 18, 2016 at 7:02 pm

        I used bars stop leak for a blown head gasket or cracked cylinder head. It fixed the water coming out of tail pipe and there is no water in the oil. However the car is losing compression and has a miss. Do you think this is a cracked cylinder and do you think your product can fix this ??

        • BD Auto Pro on September 28, 2016 at 6:12 pm

          Larry,

          Thanks for your question about your leak. Even if you do not have coolant in the oil or out of the exhaust you may still have a small coolant leak either from a blown head gasket or a cracked cylinder head. If you had water in your oil you could be losing compression due to corrosion of the cylinder walls or cylinder rings as well as a crack in your head, block or a partially blown head gasket. Unfortunately, to confirm any of these things you would have to tear down your engine to check.

          Thanks again for your question!
          -BD Auto Pro

      • William on October 26, 2016 at 8:53 pm

        Do yall make something for a desiel

        • BlueDevil Pro on October 27, 2016 at 8:27 am

          William-

          Yes, the BlueDevil Head Gasket Sealer would work on diesel as well as gasoline engines. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  5. Matt L. on April 19, 2015 at 8:38 pm

    What does the guarantee cover? I have a cracked block for sure. It is located right under the intake manifold where the lifters are on a 350 sbc. It is allowing coolant to mix with my oil. I’ll have to buy upper gasket set if I use this block including new head gaskets. Will the guarantee cover all my part costs? The labor I do myself.

    • BlueDevil Pro on April 20, 2015 at 11:12 am

      Matt-

      The product carries a money back guarantee. If the product does not work we will reimburse the purchase price of the BlueDevil product purchased.

      Thank You!

      -BDP

  6. Jim on May 6, 2015 at 12:11 pm

    is there a sealer you can use in the oil of an air cooled enging (lawn mower)

    • BlueDevil Pro on May 15, 2015 at 2:14 pm

      Jim-

      Unfortunately, we do not manufacture any products that are meant for the type of problem you have described.

      Thank You!

      -BDP

  7. nick on June 2, 2015 at 6:50 pm

    will blue devil work in 2stroke engines?

    • BlueDevil Pro on June 4, 2015 at 2:19 pm

      Nick-

      Yes, it will work in a 2 stroke engine. Be sure to follow the capacity chart as you will not need a whole lot to treat a cooling system of that size.

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

      Thank You!

      -BDP

      • Maddness on August 9, 2016 at 10:50 pm

        Can this product seal an engine with a hole?

        • BlueDevil Pro on August 10, 2016 at 3:09 pm

          Maddness-

          As long as the vehicle will not lose more than about 1 quart of water during a 45 minute idle then there is a very good chance the BlueDevil Radiator & Block Sealer will be able to seal it. If you are losing more than that then your vehicle will require a hard part repair.

          Thank you!

          -BDP

  8. Erika on June 22, 2015 at 3:16 pm

    I was wondering that if you use the blue devil and it seals it,does it allow you to drive far distances without it messing up again or no?

    • BlueDevil Pro on June 23, 2015 at 11:45 am

      Erika-

      Once BlueDevil creates a seal it is permanent. There is no restriction on speed or distance; neither would affect the quality of the seal.

      Thanks!

      -BDP

  9. william Thames on June 23, 2015 at 12:00 am

    I have an 89 dodge caravan with two small cracks in the block no bigger than a penny, would this product work and should i try sealing it from the outside as well?

    • BlueDevil Pro on June 23, 2015 at 10:59 am

      William-

      You should have no problem sealing a leak of that size with the BlueDevil Radiator & Block Sealer.

      Thank You!

      -BDP

      • johnetta on September 29, 2015 at 10:13 am

        Hello i have a 2000 Chrysler van and I have an engine block late will it help Cell that up the leak i used jD wheeler an it dent help because of the heat ….dose this product works against heat?

        • BlueDevil Pro on September 30, 2015 at 12:15 pm

          Johnetta-

          Yes, the BlueDevil Radiator and Block Sealer would be able to help seal the leak in your Chrysler. The product is attracted to airflow. once it is introduced to the system, it will look for the temperature differentials in the system and react with heat to form a chemical weld. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  10. Jim on July 6, 2015 at 6:27 pm

    Hi I have twin Mercruisers I/O’s with GM 305’s on my boat with cracked blocks on the inboard side of each block. It is a fresh water boat, however there is rust residue coming from the cracked areas (which we would expect).
    1) Will the rust reside affect your products ability to seal?
    2) Do you have any solutions for circulating your product on mercruiser I/O Stern Drives ?

    Thanks

    • BlueDevil Pro on July 10, 2015 at 10:20 am

      Jim-

      Yes, the rust residue could potentially affect the BlueDevil’s ability to seal.

      We have had customers use the product in marine engines by circulating the same water in a barrel or bucket. The main components you will need are circulation of the same body of water (3 – 4 gallons preferably) and heat.

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

      Thank You!

      -BSP

      • David on June 3, 2017 at 7:17 pm

        I don’t know if my block is cracked are the head gaskets are bad but what product do I use because I don’t have a radiator it’s water cooled

        • BlueDevil Pro on June 5, 2017 at 9:59 am

          David-

          Based on your description, we recommend using the BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/). The product would treat blown head gaskets as well as a crack in the block. Does the system use a water pump to circulate water? Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

    • Rob on August 9, 2015 at 11:50 pm

      Hi Jim I also have an I/O with a cracked block just wondering if you have tried to seal it and how it worked? Thanks

  11. JD on July 6, 2015 at 7:39 pm

    my car was always over heating.. I thought it was the water pump cause water was leaking out of the bottom. We replaced that and the thermostat. We took it for a ride it it lose power, shared and heVy white smoke and water came out the exhaust… We were told it’s a blown head gasket. We bought the blue devil. Took it for a drive again, the smoke & shaking went away.. But it still over heats. I don’t know what else is wrong.

  12. Chris on July 9, 2015 at 2:56 pm

    If I use this product for en exterior cracked block will this prevent me from doing any future work to the motor? Someone told me after using this they were unable to remove the head without harming the head itself. It’s a 1952.

    • BlueDevil Pro on July 10, 2015 at 10:22 am

      Chris-

      Use of the BlueDevil product would not change the difficulty of making any future repairs. The product is attracted to airflow and reacts to temperature differential to create a chemical weld; therefore the seal created by BlueDevil will only show up at the point of any leak.

      Thanks!

      -BDP

  13. Pam Harvey on July 13, 2015 at 4:50 pm

    If my radiator leaks and is empty, do I need to pour some water in before pouring the product to keep the product from leaking out?

    • BlueDevil Pro on July 15, 2015 at 8:30 am

      Pam-

      Yes, the cooling system should be basically full just leaving enough room for the recommended amount of BlueDevil.

      Thank You!

      -BDP

      • kenny on July 16, 2015 at 9:46 pm

        Do I need to drain all antifreeze before using blue devil

        • BlueDevil Pro on July 17, 2015 at 8:35 am

          Kenny-

          Yes, you should flush the cooling system and refill it with water.

          Thanks!

          -BDP

          • echo on July 25, 2015 at 11:19 am

            Will blue devil seal a crack in a 305 inboard/outboard about 4 to 5 inches long if we circulate the same water or is that too long of a crack?



          • BlueDevil Pro on August 4, 2015 at 10:37 am

            Echo-

            It really depends how quickly you are losing coolant. In general, BlueDevil will have a great shot at working as long as you will not lose more than about 1 quart of water during a 50 minute idle.

            You will definitely want to circulate the same water if you decide to use BlueDevil to ensure proper results. Feel free to contact our tech support team at 888-863-0426 with any questions.

            Thank You!

            -BDP



  14. Mark Dressel on August 5, 2015 at 2:45 am

    My 1995 Nissan van is leaking oil and coolant from a crack in the block will blue devil fix this problem?

    • BlueDevil Pro on August 5, 2015 at 9:50 am

      Mark-

      Unfortunately, we do not manufacture any products that are intended for an oil leak from the block. The BlueDevil Oil Stop Leak is intended specifically for rubber seals and gaskets and the Head Gasket Sealer is designed to stop coolant loss. Feel free to contact us at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  15. Jeanne on August 28, 2015 at 4:27 pm

    Can I use this on my 1987 VW Vanagon Air-cooled engine with an internal cracked head?

    • BlueDevil Pro on September 3, 2015 at 2:45 pm

      Jeanne-

      Yes, you can safely use the BlueDevil Head Gasket Sealer in your 1987 Vanagon. Feel free to contact us at 888-863-0426 with any questions or for further instruction.

      Thanks!

      -BDP

      • Geoffrey Sutton on February 27, 2021 at 6:14 pm

        I have to add that he stated it was an air cooled vw. No cooling system

  16. Tom on September 6, 2015 at 2:07 pm

    I have a1930 model a with 2″ hairline crack in the blocks exterior . My concern is will this clog my radiator. A friend used bars and it clogged his radiator . Model a engines are an open system not under pressure . Would that make a differance ?

    • BlueDevil Pro on September 23, 2015 at 4:41 pm

      Tom,

      Thanks for your question about your Model A. The low pressure of an open system won’t make a difference as it is the temperature differential at the leak that activates BlueDevil Radiator and Block Sealer. Similarly, BlueDevil Radiator and Block Sealer won’t clog your radiator as the temperature differentials there aren’t great enough to activate the sealing agent.

      Thanks for your question!
      -BD Auto Pro

  17. Earl L. Forman,II on September 6, 2015 at 7:55 pm

    I have a 2002 Honda Accord with a 3.0 engine.
    The problem is a porous block leak.Which of your products would you recommend ?

  18. Angel on September 7, 2015 at 10:36 pm

    My 1996 nissan maxima leaks oil and I dont know from where but it’s a pretty bad leak I used blue devil as instructed left it running for 50 minutes with the heater full blast it didn’t really slow the leak is there a reason why and if it doesn’t stop the leak do I still get my money back guarantee

    • BlueDevil Pro on September 8, 2015 at 10:37 am

      Angel-

      The BlueDevil Head Gasket Sealer is only intended for coolant/water leaks. Unfortunately, we do not manufacture a product intended to stop oil leaks from the block or head gasket. Please contact our technical support at 888-863-0426 to assist you for the warranty on the product.

      Thank you!

      -BDP

  19. mike on September 16, 2015 at 11:13 pm

    I have a small leak on a 1999 2 stroke motorcycle I hit something on bottom of motor and chipped a piece of the metal off just a small oil leak the problem is though it is air cooled. What might you suggest. Thanks mike

    • BlueDevil Pro on September 17, 2015 at 9:21 am

      Mike-

      Unfortunately, we do not manufacture any product that will seal a leak that is due to damage. Our BlueDevil Oil Stop Leak is specifically designed to rejuvenate and recondition the rubber seals/gaskets.

      The only solution may be to have the part replaced.

      Thank you!

      -BDP

    • Lewis Walkeryahoo on June 30, 2016 at 4:29 am

      I have just water coming out my exhausted pipe, I believe I have a crack head on a 2002 dodge ram 1500 , will the blue devils seal the problem

      • BlueDevil Pro on June 30, 2016 at 8:27 am

        Lewis-

        Thank you for asking about your Dodge Ram 1500. Based on your description, we would recommend using the BlueDevil Head Gasket Sealer, found here on our website: http://store.gobdp.com/head-gasket-sealer-38386/ . As long as you are not losing water/coolant too quickly and the vehicle can maintain idle for 50 minutes, 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

      • BlueDevil Pro on June 30, 2016 at 9:16 am

        Lewis-

        Yes, we recommend using BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) to stop the leak. The product has worked extremely well in sealing head gasket leaks where you see steam or water coming through the exhaust.

        Thank you!

        -BDP

  20. Duce on September 17, 2015 at 11:19 pm

    I have a 99 Honda passport and steam coming out my tail pipe I believe I have a blown head gasket, will your product fix it?

    • BlueDevil Pro on September 18, 2015 at 10:18 am

      Duce-

      Please contact us at 888-863-0426 so that we may discuss the symptoms in a little more detail. We would like to have a better idea as to what the Honda is experiencing so that we are able to make the best recommendation.

      Thank you!

      -BDP

  21. Hores on September 22, 2015 at 12:40 am

    how to get this item???

    • BlueDevil Pro on September 22, 2015 at 8:49 am

      Hores-

      You can find our products on our website, gobdp.com/products . You can also find them at your local Advance Auto Parts, AutoZone, O’reilly Auto Parts or Napa Auto Parts.

      Thank you!

      -BDP

  22. Matt on September 23, 2015 at 11:37 am

    I had either a blown head gasket or a crack somewhere in the engine. Was smelling gasoline in the coolant and getting small amounts of water in the oil. I used Blue Devil with some degree of apathy and pessimism. My tune changed real quick cause this stuff works. Thank you Blue Devil! Getting parts or engines is impossible in a 3rd world island.

  23. jimmy on October 21, 2015 at 9:02 am

    my 2009 Camry motor had small crack they said fixed with
    Blue Devil, now they’ve recalled my car for the oil enhancement
    problem replaced all pistons,rings and rods will this put
    to much stress on engine to make it undo Blue Devil’s weld

    • BlueDevil Pro on October 21, 2015 at 11:18 am

      Jimmy-

      Thank you for your question. Once the product seals, it would be a permanent seal. Replacing the pistons, rings and rods would not effect the weld the product created.

      Thank you!

      -BDP

  24. jesse on October 22, 2015 at 11:28 pm

    Hello I have a case 580c backhoe with a 207 motor with a crack between 2 cylinders it is diesel would this product work already pulled head don’t want to reassemble if it would work?

    • BlueDevil Pro on October 31, 2015 at 11:37 am

      Jesse,

      Thanks for your question about your Case backhoe. As long as the location with the crack is in a coolant passage BlueDevil Radiator and Block Sealer is guaranteed to seal your leak and get your backhoe running again. If the 2 cylinders do not have a water jacket between them then unfortunately you will need to have your block welded and machined.

      Thanks again for your question!
      -BD Auto Pro

  25. king on October 25, 2015 at 2:26 am

    my car is a Mercedes benz A170, 1999 model. i just recently found out that when i put oil in the car, the oil goes straight to the radiator of the car when i put on the engine and and pump out of the radiator when i open the radiator. can your product do rapair it

    • BlueDevil Pro on October 27, 2015 at 3:51 pm

      King-

      Unfortunately, we do not manufacture a product for the leak you have described. The BlueDevil Head Gasket Sealer is only intended for coolant leaks and the BlueDevil Oil Stop Leaks would only be for the rubber seals or rubber gaskets in the system.

      Thank you!

      -BDP

  26. Jesse duncan on October 28, 2015 at 5:03 pm

    Can blue devil clog a crack in cylinder in block of 03 landrover discovery

    • BlueDevil Pro on October 30, 2015 at 9:07 am

      Jesse-

      Yes, BlueDevil would be able to seal the leak in the block of your Landrover Discovery. The product is intended for leaks that are seeping or dripping out, so as long as you are not losing water/coolant too quickly, the product should be able to seal your leak.

      Thank you!

      -BDP

  27. Rob Warbington on October 29, 2015 at 8:33 pm

    Will it work on a 2000 dodge carvan if the block is cracked

    • BlueDevil Pro on October 30, 2015 at 9:05 am

      Rob-

      Yes, BlueDevil is able to seal leaks coming from the block. 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 during that idle period, the product should be able to seal your leak.

      Thank you!

      -BDP

      • Mike B on July 4, 2021 at 10:09 pm

        I have a 09 Suzuki Grand Vitara 2.4, it has a small hairline crack about an inch long, in the aluminum block external above the oil filter, only leaking antifreeze, it never leaks a lot and the vehicle never overheats, I like to use Blue Devil I’ve been kind of hesitant, because I’m afraid is going to clog up my heater coil or thermostat, please help with this??

        • BlueDevil Pro on July 6, 2021 at 8:36 am

          Mike-

          Thank you for asking about your Suzuki Grand Vitara. Based on your description, you would be a good candidate for the BlueDevil Radiator & Block Sealer. The product does not contain any solid or particulate matter, so it is a non-clogging product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  28. Rob Warbington on October 29, 2015 at 8:34 pm

    Will it work on any engines

    • BlueDevil Pro on October 30, 2015 at 8:41 am

      Rob-

      Yes, the BlueDevil Radiator and Block Sealer is compatible with all engines.

      Thank you!

      -BDP

  29. jerry fant on November 2, 2015 at 1:43 am

    I have a 350 that has a sleeve on number 3 cyl. The sleeve is leaking around the top of it and the orignail part of the block.i get water in my oil and thrue my exaust pipe. Will this product work on this problem

    • BlueDevil Pro on November 5, 2015 at 10:56 am

      Jerry-

      Yes, BlueDevil would be able to seal the leak you have described. As long as you are not losing water/coolant too quickly and the vehicle is able to maintain idle for 50 minutes, without overheating or stalling out, you should be able to see some great results. We would also recommend changing the oil before and after the BlueDevil process.

      Thank you!

      -BDP

  30. David mach on November 22, 2015 at 5:47 pm

    I have a 94 6.5 turbo diesel with a crack in the 8th cylinder interior how would i use bluedevil and is it gaurented to work?

  31. mehr on November 24, 2015 at 12:34 am

    hi
    i have a Peugeot 405 1800cc fuel(petrol) injection engine
    its block cracked
    is helpful your products for repair it , please tell me about how use and how much use
    thanks a lot

    • BlueDevil Pro on December 1, 2015 at 9:51 am

      Mehr-

      Yes, the BlueDevil Radiator & Block Sealer would be appropriate to use in your Peugeot to seal the cracked block. One 16 ounce bottle will treat up to a 3 gallon system.

      Thank you!

      -BDP

  32. Simon on January 13, 2016 at 11:18 am

    Hi

    Will this product cure a crack in an aluminium block? I have a coolant leak into the oil sump from a leak between an engine sleeve and the block.

    • BlueDevil Pro on January 13, 2016 at 3:08 pm

      Simon-

      Yes, BlueDevil would be able to help seal a leak in an aluminum block. As long as the vehicle will idle for a full 50 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant, then you should be able to see some good results from the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  33. Tom on January 19, 2016 at 10:09 pm

    Will it stop up the radiator or header core”

    • BlueDevil Pro on January 20, 2016 at 11:10 am

      Tom-

      The product does not contain any solid or particulate matter, so it will not clog or harm your cooling system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

      • Harry reedy on January 27, 2016 at 9:47 am

        Can you mix with andifrezz

        • BlueDevil Pro on January 27, 2016 at 3:38 pm

          Harry-

          Yes, BlueDevil Radiator & Block Sealer may be mixed and used with antifreeze.

          Thank you!

          -BDP

  34. john on January 20, 2016 at 9:34 pm

    i have a wd 45 diesel 230 buda engine that has 3 crack between different cylinders will you have product that?

    • BlueDevil Pro on January 21, 2016 at 12:02 pm

      John-

      Please contact us at 888-863-0426 so that we can get a better idea of the extent of your leaks. This will allow us to make the proper recommendation for your engine.

      Thank you!

      -BDP

  35. Lance on February 24, 2016 at 10:10 am

    I have a 95 firebird 3.4 v6 and when the temp rises to normal it starts to smoke and I can’t tell if it’s the gasket or the block. If this stuff can help will it block or clog up anything

    • BlueDevil Pro on February 24, 2016 at 10:13 am

      Lance-

      Thank you for asking about your Firebird. There are no solid or particulate matter in the product, so it is non-clogging. As long as you are following the directions and using the product as intended, you wouldn’t have any issues with clogging.

      Thank you!

      -BDP

  36. Bob Maine on February 27, 2016 at 6:02 am

    I have a 98 saturn with 1.9 leaking oil into the coolant reservoir will blue devil work for that?

    • BlueDevil Pro on February 29, 2016 at 1:37 pm

      Bob-

      Thank you for your question about your Saturn. Unfortunately, BlueDevil Head Gasket Sealer is not designed to stop oil from entering the cooling system or oil being lost from the head gasket. The BlueDevil Head Gasket Sealer is specifically made to stop coolant loss. We do not manufacture any products that will remedy the symptoms that your Saturn is experiencing. Your only option may be a hard part repair.

      Thanks!

      -BDP

  37. Michael Timms on March 11, 2016 at 2:39 pm

    Can Blue Devil Head Gasket Repair Be Used In A Vehicle That Has No Heat Or A/C? I Have A ’93 F-150 With A 302 & I Think It Has A Blown Head Gasket.

    • BlueDevil Pro on March 14, 2016 at 9:48 am

      Michael-

      Thank you for asking about your Ford F-150. You can use the BlueDevil Head Gasket Sealer without the use of your heat or a/c. The direction about putting your heater on with the blower to the max is to draw heat from the engine, to keep it from overheating during that 50 minute idle. As long as the vehicle isn’t going to overheat, you should still be able to see some good results from the product.

      Thank you!

      -BDP

  38. Vince on March 16, 2016 at 6:42 pm

    I have a small JD lawnmower with a Yanmar 3 cylinder diesel motor. It appears that there may be an internal crack in the block/head that is allowing coolant to fill the oil pan. Is this a scenario where one of your products may be useful in repairing the internal crack? Thanks in advance!

    • BlueDevil Pro on March 17, 2016 at 10:12 am

      Vince-

      Thank you for asking about your John Deere Lawnmower. Based on your description, you would be a good candidate for the BlueDevil Head Gasket Sealer. You will want to change 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

  39. Gregory Hurd on March 22, 2016 at 9:42 am

    Is the Blue Devil oil sealer safe for my 1974 VW Bus with a 1.8 L aircooled engine? The oil leaks are minor

    • BlueDevil Pro on March 23, 2016 at 11:22 am

      Gregory-

      Yes, it is 100% safe to use BlueDevil Oil Stop Leak in your 1974 VW Bus. BlueDevil Oil Stop Leak is designed to recondition, rejuvenate, and slightly expand any leaking rubber seal or gasket. BlueDevil Oil Stop Leak is not designed to work for a cracked block or leaking hard part.

      Once the product is added you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  40. Daniel on March 31, 2016 at 1:02 pm

    I have a 2005 Chevy Duramax diesel with blown head gasket or cracked block. Coolant system is getting pressurized from combustion, if I relieved the pressure in the coolant side manually by teeing in to the heater core piping, do you think I could relieve the pressure enough during the process to allow product to make a bond?

    • BlueDevil Pro on April 1, 2016 at 8:46 am

      Daniel-

      Thank you for asking about your Chevy Duramax. Relieving the pressure building up in the cooling system will give you better ciculation and hopefully help the vehicle from overheating during the 50 minute idle. A clean, free-flowing system, would be the best environment for the product, and in doing so, would give the Head Gasket Sealer the best possible chance of working properly. Feel free to contact our technical support team at 888-863-0426 with any other questions.

      Thank you!

      -BDP

    • Geoffrey Sutton on February 27, 2021 at 6:20 pm

      I would like to know if this worked for you. I have a similar issue with an lb7 with suspected cup seal leaks, and looking for a temporary fix till i can tear it apart

  41. Frank Craig on April 25, 2016 at 2:21 pm

    I recently purchased a sailboat which has a Yanmar 4HJ3-TE (four cylinder) marine diesel engine. The boat was cheap because though supposedly they had re done the head once they reassembled the motor coolant fluid leaked into the last three cylinders.

    There are three possibilities.

    1. The cylinder is cracked and coolant is flowing into the cylinders (which I assume should not be the case as this would mean three different cracks, one for each cylinder).

    2. The exhaust manifold is water cooled and could have a crack in it.

    3. The head has a crack

    4. This one would not apply, the motor was badly assembled, in this case its not your problem.

    From what I have read from your site a crack in the cylinders should seal, but would your product seal a crack in the head or the water cooled exhaust manifold?

    • BlueDevil Pro on April 26, 2016 at 12:04 pm

      Frank-

      Thank you for your question and interest in the product! Based on your description, we recommend using the BlueDevil Head Gasket Sealer, found here: http://store.gobdp.com/head-gasket-sealer-38386/ . The Head Gasket Sealer would treat leaking heater cores, leaking freeze plugs, blown head gaskets, as well as warped/cracked heads. Feel free to contact our technical support team at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  42. Storm on May 22, 2016 at 10:01 pm

    I am not quite sure what is wrong yet, either my head gasket is blown and/or there is a crack in the block, however I am not losing coolant, but I do seem to be losing oil. Will this work in this situation? And can Radiator and Block Sealer work in a turbocharged application?

    • BlueDevil Pro on May 24, 2016 at 2:37 pm

      Storm-

      The BlueDevil Radiator and Block Sealer is only intended for water/coolant leaks. Based on your description, unfortunately, we do not manufacture a product for the type of leak you are experiencing. A hard part repair may be your best option.

      Hope this helps!

      -BDP

  43. Bobby J. Bowen on May 26, 2016 at 9:35 am

    I have a Ford Y Block that someone let freeze with water in it. It has a crack at the back of the block under the bell housing area. This area has no combustion pressure on it, and is away from high stress fasting points. The crack was narrow about 5″ long, varying from 1/32 to 1/16, after a bad weld repair was ground away. The repair was filled with high temp epoxy, but still leaks about 1/4 cup of antifreeze a month.

    The car has Evans Waterless coolant, which is excellent, but finds small leaks. Do you believe your sealer will be able to stop the leak without clogging my new radiator and heater core?

    • BlueDevil Pro on June 2, 2016 at 10:19 am

      Bobby-

      Thank you for asking about your Ford Y Block. Based on your description, we would recommend using the BlueDevil Head Gasket Sealer, found here: http://store.gobdp.com/head-gasket-sealer-38386/ . The product does not contain any solid or particulate matter, so it is a non-clogging product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  44. Metric on June 13, 2016 at 10:50 am

    Hello,
    Does this product works on Aluminium Engine where i have a crack on my engine block.

    • BlueDevil Pro on June 13, 2016 at 11:17 am

      Metric-

      Yes, BlueDevil Radiator & Block Sealer will work on aluminum engines.

      Thank you!

      -BDP

  45. J.R. on June 14, 2016 at 6:07 pm

    I have 2 small cracks in the heads of my car gas motor. I saw them when I replaced the manifold , when refurbishing the engine during car restoring. The car was running good before the engine removal.If I reinstall the motor, and use your product should it seal them?

    • BlueDevil Pro on June 16, 2016 at 10:37 am

      J.R.-

      As long as the vehicle will maintain idle for 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 good candidate for the product. Feel free to contact our technical support team at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  46. Terence on June 16, 2016 at 7:56 am

    In the event that there is a crack in the block and possibly also a leak in the cylinder head gasket – will Blue Devil Radiator & Block Sealer also seal leaks in the cylinder head gasket or do I need to use both products – ie
    Blue Devil Radiator & Block Sealer and BlueDevil Head Gasket Sealer?

    • BlueDevil Pro on June 16, 2016 at 9:38 am

      Terrence-

      Based on your description, the product you would want to use would be the BlueDevil Head Gasket Sealer. The product will seal leaks coming from the head gasket as well as the block. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  47. Rick on August 24, 2016 at 3:34 pm

    I have a marine motor. My Uncle left water in the engine and it cracked. There is a visible crack on the outside and the oil is milky. Im assuming that it is cracked on the inside as well. From what I am reading this will help. My uncle mentioned that it was overheating so would this seal before overheating and filling the oil with water?

    Rick

    • BlueDevil Pro on August 25, 2016 at 3:16 pm

      Rick-

      It really depends on how quickly the engine is wanting to overheat. BlueDevil Radiator & Block Sealer requires that the engine is able to idle for a solid 45 minute period without stalling out or overheating. If it is able to run 45 minutes without overheating then you should have no problem sealing the leak.

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

      Thank you!

      -BDP

  48. Ilja on August 31, 2016 at 7:27 am

    Hi!
    What product can we use to seal motor cylinder head? We have some cracks between 2 exhaust valves. Can we use Radiator and Block Seale?

    Regards, Ilja

    • BlueDevil Pro on September 1, 2016 at 9:23 am

      IIja-

      Based on your description, we recommend using the BlueDevil Head Gasket Sealer, found here on our website: http://store.gobdp.com/head-gasket-sealer-38386/. As long as you are not losing water/coolant too quickly, and the vehicle can maintain idle for a full 50 minutes, you would be a great candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  49. Ross on September 18, 2016 at 6:50 pm

    I have a 6-7 inch hairline crack in my MB 1943 block roughly in the middle of the right hand side of motor it has missed the distributor hole. It runs through the middle of the upper welch plug, and fluid is slowly weeping out at a small rate. Can your product cure this and is it a once only treatment (will it need to be replaced every time I change coolant) and most important to me will it stop the crack getting longer?

    • BlueDevil Pro on September 27, 2016 at 10:08 am

      Ross-

      Based on your description, you would be a great candidate for the BlueDevil Radiator & Block Sealer, http://store.gobdp.com/radiator-block-sealer-00205/. Once the product seals, it would be a permanent seal, so you would not need to use it every time the coolant is changed.

      Thank you!

      -BDP

  50. orenthal pinder on October 16, 2016 at 4:45 pm

    if i take off my heads and see the block has small holes,can i put it back on and use the blue devil

    • BlueDevil Pro on October 18, 2016 at 10:15 am

      Orenthal-

      BlueDevil Radiator & Block Sealer is intended for water/coolant leaks. Are you noticing a loss of water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s symptoms and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  51. Joe on November 14, 2016 at 12:07 am

    Will it fix a cracked head in a 2.3 liter 4’cylinder?

  52. Derek on November 20, 2016 at 6:24 pm

    Hello, Hello,
    My Name is Derek, I am from Nome Alaska. I have a 1991 Ford explorer. It shows roughly 75,XXX miles on it. Of course it resets after a 100,000. Anyways I bought this car this summer and i put about 6,000 miles on it, and the clutch went out, so i replaced it. After that the car started burning coolant out the exhaust, like a lot. So I stripped the car down to the block to check the head gaskets and realized the passenger side gasket was blown, and I replaced the driver side head cylinder. I didnt replace the passenger side. I should have replaced both sides at the time but just the driver side. Anyways after replacing gaskets and driver side cylinder the same problem happened within two weeks or so. So yesterday i finally had time to strip it down and took both heads off and the new head is fine, the passenger side head tho is cracked between the exhaust valves and they are leaking so I ordered a new head for the passenger side. but once back together and if i have the same problem i swear it would be internally on the engine block which i am afraid of it might be. Would this product work if the leak is internally on my engine block?!? Please let me know. Thank you

    • BlueDevil Pro on November 22, 2016 at 9:44 am

      Derek-

      Thank you for asking about your Ford Explorer. Yes, the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/ would be able to seal an internal engine block leak. 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

  53. Mark Low on December 2, 2016 at 11:38 am

    My name is Mark. I have a 94 Dodge Stealth. Just recently I notices steam coming from near the radiator hoses connecting to the block. Thought it was a hose. Not so. It appears to be leaking antifreeze smelling steam from either the cylinder head or engine block. No white steam coming from tailpipe.No loss of power. I understand one of your products will work if my car will idle for 45 min and not leak a qt of coolant thru steam. Just not sure which one. Thanks for your help.

    • BlueDevil Pro on December 5, 2016 at 11:45 am

      Mark-

      Thank you for asking about your Dodge Stealth. Based on your description, we recommend using the BlueDevil Radiator & Block Sealer http://store.gobdp.com/radiator-block-sealer-00205/. If your vehicle can meet the basic guidelines you mentioned in your question, you should be able to see some great results.

      Thank you!

      -BDP

  54. Delilah R Prine on December 15, 2016 at 2:49 pm

    I have a 93 Honda Civic EX 1.6 and when beginning to replace the water-pump noticed that the valve cover was milky and there was already white smoke coming from the tailpipe so under the assumption that I have a blown head gasket I have bought the 16 ounce bottle of head gasket repair and a 16 oz bottle of radiator and block sealer. I’m wondering if 16oz is going to be enough for this size engine? Should I use both bottles if 32oz is what my motor calls for.also I’m having a problem with the Car idling so I’m not exactly sure that it’s going to be able to idle for 50 minutes without me pressing the gas to help it. What do you recommend that I do to help it stay at a normal idle. I read in someone’s comment that removing one of the spark plugs that may be dirty or have milky residue on it can help keep the vehicle at a normal idle but it is very detrimental that I get this leak ,crack or blown gasket repaired ASAP and I also need to know if using seafoam in my engine is necessary or recommended with blue devil, if so should I use them both at the same time or in which order and how far between each treatment? I am at work and have to put this Blue Devil in so that I can hopefully make it home today. Is the fact that I cannot change my oil prior to using Blue Devil going to make a difference in the ending results being good. Once I complete the Blue Devil treatment how long should I wait before I change my oil and should I repeat the Blue Devil treatment with the new oil or should I try radiator and block sealer with the next Oil Change?

    • BlueDevil Pro on December 16, 2016 at 10:16 am

      Delilah-

      Thank you for asking about your Honda Civic. 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. Unfortunately, if the vehicle is unable to idle for a full 50 minutes, without over heating or stalling out, then the leak you are having may be a little too extreme for the product.

      Thank you!

      -BDP

  55. Enrique Sacco on December 15, 2016 at 3:38 pm

    Hi I have a stuart marine engine which has a slightly cracked barrel on the outside. Its 1 inch long and less than 1mm thick. Will this work on it and will the crack enlarge over time ? Didn’t understand what you guys were saying about the 50 litre capacity .. what does water has to do with healing the crack ? Thanks

    • BlueDevil Pro on December 21, 2016 at 9:31 am

      Enrique-

      Thank you for asking about your Stuart marine engine. Based on your description, we recommend using the BlueDevil Radiator & Block Sealer http://store.gobdp.com/radiator-block-sealer-00205/. You would need the proper amount of water/coolant in the system to prevent the engine from overheating during the BlueDevil process. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  56. Curtis on December 23, 2016 at 11:48 pm

    Can this product be used simultaneously with the pour n go head gasket sealer? I know I have a leaking heater core but also suspect a cracked engine block.

    • BlueDevil Pro on January 3, 2017 at 2:53 pm

      Curtis-

      The BlueDevil Pour-N-Go Head Gasket Sealer would seal a cracked engine block as well as a heater core leak. There would not be any need to use both products. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  57. Glenn Henry on January 13, 2017 at 4:23 pm

    i have a 1500 chev 4.3 engine in my truck.I have replaced the waterpump and thermastat.In the front of my engine i still have a leek water keeps coming out.I think there is a hairline crack in my block,will your bluedevil product work on sealing up the crack,I live in Abbottsford,British Columbia Canada where would I purchase your product.how much does it cost?

    • BlueDevil Pro on January 16, 2017 at 3:00 pm

      Glenn-

      Thank you for asking about your Chevrolet 1500. Based on your description, we do recommend using the BlueDevil Head Gasket Sealer, which is also available on our website, http://store.gobdp.com/head-gasket-sealer-38386/. 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.

      Thank you!

      -BDP

  58. Melvin Harder on February 19, 2017 at 12:44 pm

    My bbc 496 has studs in the block to mount the heads, well near the #8 cylinder the stud looks like it has made a crack from the stud over and into the cylinder wall down about 1/2″ will one of your products repair this.

    • BlueDevil Pro on February 20, 2017 at 10:30 am

      Melvin-

      We recommend applying 32 ounces of BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) to treat your Chevy Big Block. As long as the leak is not severe you should have no problem sealing it with a treatment of BlueDevil.

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

      Thank you!

      -BDP

  59. juanita on April 9, 2017 at 9:56 am

    Juanita I tryed bluedevil for the crack in my engine and drove it over 500 miles. I also added more oil and now three weeks later its smoking worse than it was. what happen? do i need to buy a different product to stop the light blue smoke?

    • BlueDevil Pro on April 10, 2017 at 10:18 am

      Juanita-

      The BlueDevil Radiator & Block Sealer is only intended for water/coolant leaks. Is this the product that you used? 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

  60. Rich on April 9, 2017 at 10:23 am

    2010 Buick LaCrosse w/ 140,000 miles. I have a coolant smell after vehicle has been driven. Just had the water pump changed and thought it was leftover coolant burning off. After 2 weeks I still smelled coolant (nothing is on the garage floor) so I took it back into the dealer. They said the coolant was very low and found that I have a porous block. Solution is to replace the engine. Obviously, I don’t really want to do that due to the cost. They didn’t say anything about a crack in the block, just that it is porous. Have you had customers with similar issues have success with your product? Or is a porous block mean that eventually there will be ultimate failure, even after using your product?

    Thanks for you assistance.
    Rich

    • BlueDevil Pro on April 10, 2017 at 11:15 am

      Rich-

      Thank you for asking about your Buick Lacrosse. Based on your description, we recommend using the BlueDevil Radiator & Block Sealer (http://store.gobdp.com/radiator-block-sealer-00205/). As long as you are not losing water/coolant too quickly, and the vehicle will maintain idle for a full 45 minutes, you would be a great candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  61. Tyler Olson on April 15, 2017 at 12:54 am

    Hi I have a 1995 Honda Civic and its has been leaking oil into my radiator and coolant overflow tank I had it checked and it does have a internal crack I am wondering if this stuff will work to permanently fix it.

    • BlueDevil Pro on April 17, 2017 at 10:12 am

      Tyler-

      Thank you for asking about your Honda Civic. Unfortunately, we do not manufacture a product intended to stop oil from getting into the radiator or coolant overflow. The BlueDevil Head Gasket Sealer and Radiator & Block Sealer are intended for water/coolant leaks only. A hard part repair may be your best option.

      Thank you!

      -BDP

  62. David on April 30, 2017 at 5:38 pm

    I have a 93 Honda accord with either a cracked head or a blown head gasket. The shop I took it to said they could not determine which without taking the engine apart. Which product should I use?

    • BlueDevil Pro on May 1, 2017 at 10:02 am

      David-

      Thank you for asking about your Honda Accord. 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

  63. Stan Salamba on July 13, 2017 at 7:43 am

    I have a Toyota Hilux with a 3L engine. It smokes white. Mechanics say that the head has cracks internally.Oil level is fine however the coolant level decreases somehow. Will blue devil head gasket sealer do the job of sealing these cracks?
    Where can I get this product here in Malawi, Africa?

    • BlueDevil Pro on July 13, 2017 at 8:45 am

      Stan-

      Thank you for asking about your Toyota Hilux. Based on your description, you would be a great candidate for the BlueDevil Head Gasket Sealer. The product can be ordered directly on our website, http://store.gobdp.com/head-gasket-sealer-38386/. Be sure to follow the cooling system capacity to ensure the proper amount of product is used.

      Thank you!

      -BDP

  64. Reb on September 20, 2017 at 1:55 pm

    I have a 1997 Lincoln Town car with 114K miles. I’m told it will be $2700 to fix the cracked block. I want to sell it but of course no one will buy it with a cracked block. Should I just use Blue Devil and call it good? I don’t want to mislead anybody but I also need to get it sold. Does the stuff truly work? SWF who knows NOTHING about cars!

    • BlueDevil Pro on September 21, 2017 at 9:42 am

      Reb-

      Thank you for asking about your Lincoln Town Car. As long as you are not losing water/coolant too quickly, you would be a great candidate for the BlueDevil Radiator & Block Sealer (http://store.gobdp.com/radiator-block-sealer-00205/). Once the product seals, it would be a permanent seal, so you would be good to go at that point. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  65. Roel on September 27, 2017 at 9:59 pm

    I have a small leak where the engine block and water pump connect, can this product help seal that leak?

    • BlueDevil Pro on September 28, 2017 at 8:48 am

      Roel-

      Have you confirmed whether the leak is coming from the block or the water pump? 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

  66. John Gilmore on October 17, 2017 at 1:58 pm

    I have a 2017 Ford 6.0L diesel powerstroke with 153K miles. Starting to see white smoke from the tailpipe while under a load. Will your product fix this? Thanks.

    • BlueDevil Pro on October 18, 2017 at 10:02 am

      John-

      Thank you for asking about your Ford 6.0L. 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 span, you would be a great candidate for the BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/). The product is compatible to use on diesel engines. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  67. Chas on November 27, 2017 at 1:11 pm

    I have a 2002 accord that is leaking oil into the coolant reservoir. The radiator is filled with brown sludge, but mechanic says my head gasket is still good. He thinks the engine block has a porous leak as is common on these accords. If I do a thorough chemical radiator flush and then use this product, should I expect it to seal the leak?

    • BlueDevil Pro on November 27, 2017 at 3:30 pm

      Chas-

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

      Thank you!

      -BDP

  68. Shaun on November 29, 2017 at 11:11 am

    I have a Case 580 Super L backhoe. I narrowed the coolant leak down to an external leak on the corner of the cylinder head between the block. I believe the head gasket is failing between the two. Should i use the head gasket sealer or the block and radiator sealer?

  69. Fred Greenier on February 6, 2018 at 7:52 pm

    I have a 04 GMC, 80000 miles with a 6.0 The block is rusted and flaking up behind the starter so coolant is weeping out but not enough to pool under the truck.My mechanic has already tried Bar copper block sealer that hasn’t worked. Can i use your block sealer on top of the Bar? will they play well in the same space? is your product a different kind of sealer than the Bar? Thank you.

    • BlueDevil Pro on February 7, 2018 at 10:19 am

      Fred-

      Thank you for asking about your GMC. Being that you have already added a sealer to the system, we recommend thoroughly flushing the cooling system, prior to adding BlueDevil. BlueDevil does not contain any solid or particulate matter, so it does not have some of the clogging or restricting tendencies that other products may have. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  70. Larry Follestad on February 8, 2018 at 8:30 am

    sir, what would be the best blue devil product for a cracked block between two cylinders 93 suzuki 4 cyl. aluminum block

    • BlueDevil Pro on February 8, 2018 at 10:16 am

      Larry-

      How quickly is it losing water/coolant? Is the vehicle overheating at all? You may use either of the two 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 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.

      Thank you!

      -BDP

  71. Robert on March 6, 2018 at 3:25 pm

    Hello, I have a 2007 honda civic lx with 70K on it. I purchased it used less than a year ago. The other morning I notice coolant fluid on the ground.Drove it to get checked out and they discovered a hairline cracked toward the front of the engine block. This is a known manufacturers defect but my car is out of the ext. warranty period. Blue Devil radiator n block pour n go was suggested as a possible fix or temporary fix. I did use it and it seemed to lessen the leak but not stop it completely. The car ran for over 300 miles with no overheating but their is still a slower leak. Is a second bottle of Blue Devil radiator & block pour n go recommended or can a second bottle do more harm than good?

    • BlueDevil Pro on March 6, 2018 at 3:53 pm

      Robert-

      Please contact us at 888-863-0426 so that we can assist you.

      Thank you!

      -BDP

  72. Chris on March 10, 2018 at 5:26 pm

    Will this work on a 2006 Honda Civic cracked engine block that is leaking coolant?

    • BlueDevil Pro on March 12, 2018 at 9:20 am

      Chris-

      Thank you for asking about your Honda Civic. How quickly are you losing coolant? As long as the leak is not more than a seep or a light drip, you would be a good candidate for the BlueDevil Radiator & Block Sealer (https://store.gobdp.com/radiator-block-sealer-00205/). Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  73. JOse on March 15, 2018 at 12:46 pm

    I have 2003 Dodge 1500 5.7L with a cracked engine. Will this stuff work? The engine knocks when running.

    • BlueDevil Pro on March 15, 2018 at 2:20 pm

      Jose-

      Thank you for asking about your Dodge Ram 1500. How quickly are you losing water/coolant? Is the engine knocking because water/coolant is getting into the engine oil? Please contact our technical support line at 888-863-0426 so that we may get a little more information about the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  74. Mark Luxton on April 7, 2018 at 1:58 pm

    I have a six cylinder diesel tractor engine losing water in to the oil. Not looking like it is going into the combustion or out of the exhausted.
    When I fill up the radiator the water is going into the oil fast.
    What do you guys recommend.
    Regards
    Mark

    • BlueDevil Pro on April 9, 2018 at 9:17 am

      Mark-

      Thank you for asking about your tractor with diesel engine. Based on your description, unfortunately, it sounds like you are losing water a little too quickly for the BlueDevil Head Gasket Sealer to be affective. A hard part repair may be your best option.

      Thank you!

      -BDP

  75. Michael on April 23, 2018 at 2:25 pm

    I have a 92 Plymouth laser turbo with a small crack on a coolant jacket. I have slowed down the leak to a tiny bead using JB weld on it. I am wondering if this will be good for a boosted application? not high HP only near 400whp running 30psi.

    thank you.

    • BlueDevil Pro on April 24, 2018 at 8:48 am

      Michael-

      Thank you for asking about your Plymouth Laser Turbo. The product should not be used as a preventative measure or preventative maintenance, however, if you are still continuing to lose water/coolant, it would be appropriate to use the BlueDevil Radiator & Block Sealer. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  76. Thomas mulvaney on August 4, 2018 at 9:49 pm

    I have a sbc 400 that has a small crack in the cylinder head combustion chamber. That goes from the intake valbe to the outer edge of the combustion chamber. Will blue devil work for this? It is caisin pressure in the radiator

    • BlueDevil Pro on August 6, 2018 at 9:37 am

      Thomas-

      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, the BlueDevil Head Gasket Sealer would be able to seal that kind of leak. 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 lowest 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

  77. Bertha on September 7, 2018 at 8:09 pm

    I have a 2016 Chevrolet cruze. Aluminum head and block. No compression. Will this product work for me?

    • BlueDevil Pro on September 10, 2018 at 9:37 am

      Bertha-

      Thank you for asking about your Chevrolet Cruze. Are you noticing a loss of antifreeze, or is the vehicle overheating at all? Please contact our technical support line at 888-863-0426 so that we may get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  78. Ian on October 20, 2018 at 4:07 pm

    My 2003 Ford Ranger 4.0xle is getting oil into the radiator. The compression is 100%, it does not use water and the water does not mix with the oil, only oil into the water. Will your product help?

    • BlueDevil Pro on October 22, 2018 at 9:11 am

      Ian-

      Unfortunately, we do not manufacture a product intended to stop oil from getting into the radiator. The BlueDevil Head Gasket Sealer is only intended for water/coolant leaks. A hard part repair may be your best option.

      Thank you!

      -BDP

  79. James I on November 26, 2018 at 11:26 pm

    We recently discovered that my 2003 Land Rover discovery has a crack in the engine block. The car can barely run a few miles before leaking a considerable amount of coolant. Thinking about selling rather than paying the ridiculous cost for a new engine. Will this product fix the crack?

    • BlueDevil Pro on November 27, 2018 at 9:13 am

      James-

      Thank you for asking about your Land Rover Discovery. Unfortunately, it sounds like you may be losing coolant a little too quickly for the product to be successful. BlueDevil is intended for leaks that are seeping, or lightly dripping. A hard part repair may be your best option.

      Thank you!

      -BDP

  80. Shane Gray on December 9, 2018 at 10:35 am

    2003 6.0 powerstroke developed a crack on outside of head. It will weep coolant over days sitting but if running it will drip a drop ever 2 seconds roughly. Looking for product to get through holiday time. I see it has no particular matter. Just wanna confirm it will not clog oil or egr coolers? Thank you

    • BlueDevil Pro on December 10, 2018 at 10:08 am

      Shane-

      Based on your description, you would be a good candidate for the BlueDevil Head Gasket Sealer, https://store.gobdp.com/head-gasket-sealer-38386/. As long as the product is used appropriately and as intended, clogging is not an issue you would have. Be sure to follow the cooling system capacity table to ensure the proper amount of product is used.

      Thank you!

      -BDP

  81. Alex Phillips on December 22, 2018 at 5:31 am

    My Marine engine is in bits, Could I apply the liquid sealer to the crack directly and heat it up manually? I could arrange to block off the various water outlets maybe even circulate the water mix if that necessary?

    • BlueDevil Pro on December 27, 2018 at 9:31 am

      Alex-

      Unfortunately, we do not recommend utilizing the product in the way you have described. It is intended to be added to a complete system and continuously circulate. The product itself is attracted to airflow and will react with heat to form a chemical weld.

      Thank you!

      -BDP

  82. Peter on June 1, 2019 at 6:01 pm

    I have a cracked block on my 1997 5.7L 8 cylinder. Crack is from outside so If i patch that block not to lose any water in period of 45 minutes like you are saying, will bluedevil do the permanent seal from inside and and prevent block crack from further spreading ?

    • BlueDevil Pro on June 3, 2019 at 10:19 am

      Peter-

      The BlueDevil Radiator & Block Sealer is attracted to air flow and works by looking for the temperature differentials in the system. If you patch the leak, the product may not be able to find the leak point. 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

  83. William on June 20, 2019 at 3:18 pm

    Have a Ford 555 , 3- cylinder backhoe. Small crack in head. Small amounts of water getting in oil. Seeing tiny plumes of oil floating up into radiator, along with occasional air bubbles. Tractor runs excellent and shouldn’t be a problem to run it idle for required time.
    Once directions are filled. If desired results are acquired, do I leave blue devil sealer in system? Do I add required coolants to system?

    • BlueDevil Pro on June 20, 2019 at 3:49 pm

      William-

      Once directions are filled, if desired results are acquired, it would not be necessary to leave BlueDevil in the system. The product only reacts to heat one time (one heat cycle). After the procedure is complete, the product will not continue to react or continue to seal, so you are not getting any additional benefit by leaving it in the system. You would want to get your regular 50/50 mix back in there. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  84. Denis Adilio on June 29, 2019 at 10:25 am

    Hello does the blue devil works for inborad boat motors? I have a inborad boat motor that water goes into the oil . Please help

    • BlueDevil Pro on July 1, 2019 at 11:08 am

      Denis-

      Yes, BlueDevil would be safe and compatible to use on an inboard motor. You would want to change the oil before and after the BlueDevil procedure. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  85. Andy on July 1, 2019 at 9:49 am

    I’m reading threw the comments, I have a cracked block 4.3 merc, I’m currently pulling the motor and tearing it down to find out how bad it is, because it’s is, When I find the crack or cracks, can this be poured into or on to the cracks directly? Dose the product require heat and pressure to work?

    • BlueDevil Pro on July 1, 2019 at 1:42 pm

      Andy-

      Unfortunately, the product can not be utilized as you’ve described. The product does react with heat to form its chemical weld but, relies on pressure and air flow to help accomplish this.

      Thank you!

      -BDP

  86. Mike Pettit on October 25, 2019 at 1:31 pm

    I am wondering if Blue devil can be added to the coolant as a preventive measure….I have a 97 GMC 5.0L that was famous for the head gasket going….can i add it as a precaution without damaging anything else?

    • BlueDevil Pro on October 25, 2019 at 2:10 pm

      Mike-

      No, the BlueDevil Head Gasket Sealer should not be used as a preventative measure/maintenance. It is only intended for water/coolant leaks. Adding the product to a system that doesn’t have a leak could cause adverse effects.

      Thank you!

      -BDP

  87. Jim on October 25, 2019 at 6:06 pm

    I had a blown gasket some time back. I haven’t fixed it yet coz it’s been too expensive. The car is an old Buick 95 that had lots of miles on it. Now it just sits in the garage at home. I’m looking to fix it now and I’m so glad I ran into this article. Had a few questions though. Is BlueDevil compatible with my car? And how much will it cost me?

    • BlueDevil Pro on October 28, 2019 at 8:48 am

      Jim-

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

      Thank you!

      -BDP

  88. Gilberto Rivera on October 27, 2020 at 11:08 pm

    Hi I have a 63 390 tbird and it has a crack by one of the freez out plug it’s about one and a half inch on the starter side, would blue devil work

    • BlueDevil Pro on October 28, 2020 at 8:26 am

      Gilberto-

      Thank you for asking about your Ford Thunderbird. BlueDevil Head Gasket Sealer would be able to treat leaking freeze plugs and is intended for leaks that are seeping or lightly dripping. As long as you are not losing water/coolant too quickly, you would be a good candidate for the product.

      Thank you!

      -BDP

  89. Adewale Aderemi on November 28, 2020 at 12:14 am

    I am based in Lagos Nigeria , how can I get it ?

    • BlueDevil Pro on November 30, 2020 at 9:45 am

      Adewale-

      Thank you for your interest in BlueDevil Products! Our products can be ordered directly on our website. Simply complete the order process and enter your shipping information when prompted. We do ship to Nigeria.

      Thank you!

      -BDP

  90. Jo on January 8, 2021 at 6:15 pm

    My car was running hot and they turned it of,it started leaking oil from underneath ,will this stuff help it by putting it in the coolant.

    • BlueDevil Pro on January 11, 2021 at 9:28 am

      Jo-

      Unfortunately, the BlueDevil Head Gasket Sealer would not be able/intended to seal the oil leak you are experiencing. The product would only be intended for water/coolant leaks. A hard part repair may be your best option.

      Thank you!

      -BDP

  91. Michael on July 9, 2021 at 11:11 pm

    Will this seal a cracked oil well?

    • BlueDevil Pro on July 12, 2021 at 8:15 am

      Michael-

      The BlueDevil Radiator & Block Sealer is specifically intended for water/coolant leaks. Unfortunately, we do not manufacture a product for the leak you’ve described. A hard part repair may be your best option.

      Thank you!

      -BDP

  92. James Reece on September 8, 2021 at 10:10 pm

    I have a 1983 Isuzu P’up with the C223 2.2L diesel. I just rebuilt this engine after my friend overheated it about 11 years ago, and I was unaware of the either the cracked block or cracked head at the time, as I just now got through replacing the head gasket with less than 100 miles on the fresh rebuild, as the water drains from the cooling system in amount, within 6 minutes, from a full-in-the-neck of the radiator with water, to being able to see the top of the core inside of the radiator after the water has run out. Will this product seal both block and head, as in the cracks in either? I have a replacement engine coming, but after doing all of this work, I want to drive it and I don’t want to have to wait for winter weather to work on it again because of where I live. The temperatures here are very extreme in the summer.

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

      James-

      Thank you for asking about your Isuzu. The BlueDevil Head Gasket Sealer is intended for leaks that are seeping or lightly dripping. Based on your description, it sounds as though you are losing water a little too quickly for the product to be successful. In order to get the benefit of using the product, the vehicle would need to be able to idle for a full minutes, and you shouldn’t be losing more than about a quart of water during that 50-minute run.

      Thank you!

      -BDP

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