How to Repair a Leaking Crankshaft Seal

#driveyourlife

crankshaft sealOil leaks in your car are never fun.  Unless you’ve simply given up on your car and are just trying to get the last few miles out of it before it heads to the junkyard, oil leaks can be one of the most annoying problems to have with your car.  Oil leaks cause a wide variety of problems in your car.  First off, they make a mess.  Oil leaks will cover your engine, transmission and underside of your car in an oily film that is difficult to remove.  On metal parts of your car this oil film will attract road dust and dirt covering everything in a layer of black grime that can make your vehicle surprisingly difficult to work on.  On hoses and wires this oil film can accelerate deterioration and lead to vacuum leaks or electrical issues.

Not only is leaking oil messy, it can lead to oil burning on the hot area of your engine leading to harmful fumes and the danger of a possible fire.  Most importantly, leaking oil can lead to dangerously low oil levels in your engine which can lead to accelerated engine wear and possible catastrophic damage.  If the oil level in your engine gets too low the bearings for your crankshaft and camshafts won’t be properly lubricated, and in extreme cases your oil pump may become uncovered leading to low oil pressure and major problems.

crankshaft sealFor many years, the most accepted way of fixing oil leaks was to disassemble much of your engine and replace the gasket or seal that is leaking.  A gasket, usually made of paper, cork or rubber seals two stationary objects in your engine to keep oil where it should be.  This is the case in components like your valve covers, timing covers or the oil pan.  Seals on the other hand, are at the end of shafts and keep oil from seeping past the shaft as it spins.  Every shaft in your engine, like the crankshaft or camshafts are supported by bearings which need to be lubricated by pressurized oil to keep them from quickly wearing out.  This lubricating oil needs to be contained inside your motor where the shaft exits the engine or you will have an oil leak.  The seals in your engine accomplish this task over a wide range of temperatures, engine RPMs and other harsh conditions.

There are a lot of things that can cause the seals in your engine to start leaking.  First, simple wear and tear can cause the inside of the shaft seal to wear so much that it will start to allow oil past it.  Low oil levels can also accelerate this process.  The material that shaft seals are made from also can start to deform if your car isn’t regularly used and the shaft is allowed to sit stationary for multiple months.  Also, a lack of use can allow the seals to start to dry out as the rubber is kept pliable from the constant bath of oil they get during normal engine use.

In some cases, replacing the gasket or seal is relatively easy.  If you have an engine with overhead camshafts, the camshaft seals may be easily accessible at the top front of the engine.  Similarly valve cover seals usually don’t require the removal of many components to replace since they are on top of your engine.  Your crankshaft seal is unfortunately the most difficult seal to replace in your engine.  Your crankshaft will have a seal at the front and back of your engine and both require the removal of a significant amount of your engine to replace.  In some cases the motor will even need to be removed from the vehicle in order to replace the crankshaft seals.

Luckily, modern technology has allowed BlueDevil to develop a simple to use engine oil additive that can repair your crankshaft seals so that you never have to go through all the work of replacing them.  BlueDevil Rear Main Sealer is specifically designed to target your crankshaft seals for repair.  BlueDevil Rear Main Sealer is a non-particulate chemical sealer that will restore your crankshaft seals to their original size and pliability restoring their ability to seal against your crankshaft and stopping your oil leak.

BlueDevil Rear Main Sealer

For more information about BlueDevil Rear Main Sealer, visit our product information page here: Rear Main Sealer

You can purchase BlueDevil Rear Main Sealer at the link above or at any of our partnering local auto parts stores like:

  • AutoZone
  • Advance Auto Parts
  • Bennett Auto Supply
  • CarQuest Auto parts
  • NAPA Auto Parts
  • O’Reilly Auto Parts
  • Pep Boys
  • Fast Track
  • Bumper to Bumper Auto Parts Specialists
  • S&E Quick Lube Distributer
  • DYK Automotive

 

Pictures provided by:

crankshaft.jpg – By Alex Kovach – Licensed By Creative Commons via Wikimedia – Original Link
crankshaft_bearings.jpg – By VX1NG – Licensed By Creative Commons Via Wikimedia – Original Link

BlueDevil Products can be found on Amazon.com or at AutoZone, Advance Auto Parts, O’Reilly Auto Parts, NAPA, and other major auto parts retailers.

131 responses to "How to Repair a Leaking Crankshaft Seal"

131 Comments

  1. Leland. Pierce on March 16, 2016 at 2:53 pm

    Will bluedevil work on crankshafts

    • BlueDevil Pro on March 17, 2016 at 9:30 am

      Leland-

      Yes, the BlueDevil Oil Stop Leak would seal leaks coming from the Crankshaft Seal. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

      • william on May 4, 2016 at 4:01 pm

        does stop leak work on cam shaft oil leaks

        • BlueDevil Pro on May 5, 2016 at 10:49 am

          William-

          Unfortunately, our product is not designed to work for the type of leak you are experiencing. BlueDevil Oil Stop Leak is specifically designed to work for leaking rubber seals/gaskets such as oil pan gaskets, rear main seals, valve cover gaskets, etc.

          Thank you!

          -BDP

      • Scott Davidson on May 23, 2016 at 3:32 am

        Will this stop the crankshaft oil seal on a Peugeot 206

        • BlueDevil Pro on May 23, 2016 at 2:34 pm

          Scott-

          Yes, we recommend adding BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/) to stop your oil loss from the crankshaft seal. Once the product is added you can expect to start seeing results after about 100 miles of driving.

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

          Thank you!

          -BDP

      • Kevin on February 2, 2017 at 7:42 pm

        Will this work on a ski doo crank shaft seals

      • Johnson on November 6, 2017 at 7:46 am

        Hi can you ship to Kenya?

        • BlueDevil Pro on November 6, 2017 at 9:45 am

          Johnson-

          Yes, we do ship to Kenya. You may order the product on our website, http://store.gobdp.com/oil-stop-leak-49499/, enter your billing and shipping information, and your total would be calculated at order checkout.

          Thank you!

          -BDP

          • Auwstin on April 2, 2022 at 7:24 am

            Will it work on a front main seal on my 2002 Chevy camaro



          • BlueDevil Pro on April 4, 2022 at 8:18 am

            Auwstin-

            Thank you for asking about your Chevy Camaro. The best product to use for your front main seal leak is the BlueDevil Oil Stop Leak. You should expect to start seeing results after 100-200 miles of driving.

            Thank you!

            -BDP



      • Michael Renzi on November 17, 2018 at 12:30 pm

        The frontcrankshaft deal on my 2008 BMW 328 xi is leaking

        • BlueDevil Pro on November 19, 2018 at 9:19 am

          Michael-

          Thank you for asking about your BMW 328xi. The BlueDevil Oil Stop Leak would be able to treat the front crankshaft seal leak you are experiencing. You will be using one oz. of the product per quart of oil in the system, and should expect to start seeing results after approximately 100-200 miles of driving.

          Thank you!

          -BDP

          • Justin on February 5, 2021 at 10:07 am

            Will this fix heavy oil leaks? Such as leaking roughly a quart every few days?



          • BlueDevil Pro on February 5, 2021 at 2:40 pm

            Justin-

            BlueDevil Oil Stop Leak is intended for leaks that are seeping or lightly dripping. It works by revitalizing and reconditioning rubber seals/gaskets. If you are losing oil too quickly, you would lose the product just as quickly. A hard part repair may be your best option.

            Thank you!

            -BDP



      • Andres Rosado on June 27, 2021 at 12:57 pm

        Does the product will work on outboards marine motors

        • BlueDevil Pro on June 28, 2021 at 8:25 am

          Andres-

          Yes, the BlueDevil Oil Stop Leak is safe and compatible to use on outboard marine engines. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

          • Yelloso sanariti on January 17, 2024 at 4:33 am

            How doe it work cz l have a groved crankshaft journal ian the oil is leaking on the rear seal



          • BlueDevil Pro on January 17, 2024 at 8:33 am

            Yelloso-

            The BlueDevil Oil Stop Leak works by revitalizing/reconditioning rubber seals/gaskets, so as long as the leak is coming from the seal, the product would be able to help seal the leak. You should expect to start seeing results after 100-200 miles of driving.

            Thank you!

            -BDP



    • Patricia on April 18, 2017 at 11:21 am

      Will this product stop my leak in a Volvo 2001 v70. The oil comes out and puddles when the engine gets warm, would this product work found out it is a crank seal leak.

      • BlueDevil Pro on April 18, 2017 at 1:43 pm

        Patricia-

        Please give us a call at 888-863-0426 so that we can get a better idea of the extent of your oil leak. This will help us determine whether or not your vehicle would be a good candidate for BlueDevil Oil Stop Leak.

        Thank you!

        -BDP

    • Nicholas Dioguardi on September 10, 2022 at 10:31 am

      Will this work oncrankshaf air leaks?

      • BlueDevil Pro on September 12, 2022 at 9:36 am

        Nicholas-

        You could use the BlueDevil Oil Stop Leak to help revitalize/recondition the rubber seals to potentially stop the air loss and prevent the fuel/air mixture from becoming too lean. Expect to start seeing improvement after 100-200 miles of driving.

        Thank you!

        -BDP

  2. Bas Neilly on May 13, 2016 at 3:38 am

    i have a crank shaft seal leak in a 2.4L engine (4 cyl) that has been leaking for about 7 months im considering purchasing but my question is, will it work? Will it work despite the age of the leak or age of the seal will it still repair the leak and for how long?

    • BlueDevil Pro on May 13, 2016 at 3:36 pm

      Bas-

      We recommend adding one 8 ounce bottle of BlueDevil Oil Stop Leak into your engine oil. This product will work to seal leaking crankshaft seals. Once it has been added you can expect to start seeing results after about 100 miles of driving.

      Feel free to contact us with any questions.

      Thank you!

      -BDP

      • Murray on November 30, 2022 at 8:52 am

        I have an old 2 stroke mercury outboard motor. Bottom crank seal is leaking. Would like to try something like this to fix seal. Not sure if I should try run your product with the gas or pour directly into engine?

        • BlueDevil Pro on November 30, 2022 at 2:43 pm

          Murray-

          You would be adding the BlueDevil Oil Stop Leak into your engine oil. You should expect to start seeing results after 1-2 hours of operation.

          Thank you!

          -BDP

  3. R on June 14, 2016 at 5:52 pm

    I have a leaking front crankshaft seal on a 96 Chevy k1500, will this product stop this leak.

    • BlueDevil Pro on June 15, 2016 at 9:53 am

      R-

      Thank you for asking about your Chevy K1500. The BlueDevil Oil Stop leak would treat a leaking crankshaft seal. As long as you are not losing oil too quickly, you would be a good candidate for the product. Typically, you should expect to see results after around 100-200 miles of driving.

      Thank you!

      -BDP

  4. Carmin Cunningham on August 5, 2016 at 9:47 pm

    I have a 2008 Saturn vue 4 cylinder. Took it to Sears and they say i have a front seal gasket crank shaft leak. Very slow leak right now will your product work. Its pretty pricey but if it works its worth the price. Feed back would be greatly appreciated,

    • BlueDevil Pro on August 10, 2016 at 3:03 pm

      Carmin-

      Thank you for asking about your Saturn Vue. Yes, the BlueDevil Oil Stop Leak would treat a leaking crankshaft seal. You can expect to see results after about 100-200 miles of driving. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

    • Tammy on April 8, 2019 at 3:12 pm

      Carmin, this this product fix your 2008 Saturn Vue oil leak after one use?

      • BlueDevil Pro on April 9, 2019 at 8:19 am

        Tammy-

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

        Thank you!

        -BDP

        • shamim on October 20, 2021 at 2:43 pm

          i have a ford galaxy 2016 will it seal my rear crank seal

          • BlueDevil Pro on October 21, 2021 at 8:52 am

            Shamim-

            Yes, the BlueDevil Oil Stop Leak would be able to seal the rear crank seal leak on your Ford Galaxy. As long as the leak isn’t more than seeping or lightly dripping, you would be a good candidate for the product. You should expect to start seeing results after 100-200 miles of driving.

            Thank you!

            -BDP



  5. Marcus Hawkins on August 29, 2016 at 10:48 am

    I have a 08 Kia Rio and I have oil leaking from my crankshaft seal and it leaks oil everywhere I park my car and would it stop my leak

    • BlueDevil Pro on August 29, 2016 at 12:15 pm

      Marcus-

      Thank you for asking about your Kia Rio. Based on your description, we recommend using the BlueDevil Oil Stop Leak, found here on our website: http://store.gobdp.com/oil-stop-leak-49499/ . You can expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  6. Gloria on September 29, 2016 at 9:29 am

    After having my water pump & timing belt replaced on my 1992 Honda Accord LX, my crankshaft is leaking. What BlueDevil product is best to stop the leak?

    • BlueDevil Pro on September 29, 2016 at 9:57 am

      Gloria-

      The BlueDevil Oil Stop Leak http://store.gobdp.com/oil-stop-leak-49499/ would be best suited to stop your crankshaft seal leak. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

      • Jordan on July 12, 2017 at 8:23 am

        I have a 2003 seat leon 1.8t 20v. Crank shaft oil is leaking casing my oil light to come on and my sump plug has a minor crack any help

      • Everardo Ortiz on September 25, 2020 at 9:34 pm

        I think I may have a front crankshaft seal leak. Would you recommend I use the “Stop oil leak” product or the “Rear main seal” product?

        • BlueDevil Pro on September 28, 2020 at 8:22 am

          Everardo-

          The best product to use for your front crankshaft seal leak is the BlueDevil Oil Stop Leak. You should expect to start seeing results after approximately 100-200 miles of driving.

          Thank you!

          -BDP

      • Chris on July 21, 2022 at 2:50 pm

        Will it work on a blown seal?

        • BlueDevil Pro on July 21, 2022 at 4:39 pm

          Chris-

          The BlueDevil Oil Stop Leak works by revitalizing/reconditioning rubber seals. It will not fill in a hole or plug in a gap. If there is a hole in the seal, unfortunately, replacing the seal would be your only remedy.

          Thank you!

          -BDP

  7. Charles Biewer on November 1, 2016 at 8:44 am

    Greetings… I have added the rear main leak sealer yesterday, and am hopeful for promised results. So far, it appears to be effective. I do have a question, however: the label and instructions do not mention anything about how long the product should re,main in the oil, and whether it might be a good thing to change oil soon after the treatment has run its course. Do you recommend and oil/filter change soon following successful treatment? Please advise, and thanks you.

    • BlueDevil Pro on November 1, 2016 at 10:46 am

      Charles-

      You can leave the product in the oil for the life of the oil. It does not have to be changed out immediately after proper results are achieved. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  8. Eugene locus on November 7, 2016 at 11:13 am

    I have a slight oil leak at the main drive belt pulley on my 08 Cadi ESV. Will Blue Devil rear main leak sealer work for this leak. AND do I have to add a new bottle Blue Devil sealer with each subsequent oil change?

    • BlueDevil Pro on November 9, 2016 at 10:15 am

      Eugene-

      Thank you for asking about your Cadillac. Unfortunately, the BlueDevil Oil Stop Leak would not treat a leaking belt pulley. A hard part repair may be your best option.

      Thank you!

      -BDP

  9. Jake on December 9, 2016 at 9:05 pm

    Hi, i have a Ford Mondeo xr5 turbo (2.5L 5cyl turbo volvo engine) with what the mechanic has said is “Engine oil leaking (crank shaft oil seal)”. Will this product fix my issue, and if so, how long will the fix last? Thanks in advance.

  10. vic hutchins on December 15, 2016 at 4:00 pm

    will this product work on a 2003 50 h,p. honda outboard motor. It is the bottom seal that is leaking.

    • BlueDevil Pro on December 16, 2016 at 11:12 am

      Vic-

      Yes, the BlueDevil Oil Stop Leak is safe and compatible to use with your Honda outboard motor for your leaking crankshaft seal. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  11. Donald Kappel on January 13, 2017 at 3:41 pm

    My mechanic says products like this can clog things in the long run and cause engine failure. He says to let it leak and add oil as needed. Your reply?

    • BlueDevil Pro on January 16, 2017 at 9:27 am

      Donald-

      The BlueDevil Oil Stop Leak does not harden or thicken in anyway, so it would not have any adverse affects on the engine or system itself. Overall, the product carries a success rate of a little over 90%. As long as you are not losing oil too quickly, you would be a great candidate for the product.

      Thank you!

      -BDP

  12. Tim on February 12, 2017 at 9:46 am

    C class benz 1999 model will it work for me ? And how to use please?

    • BlueDevil Pro on February 13, 2017 at 10:41 am

      Tim-

      Yes, the BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/) is safe and compatible to use on your Mercedes Benz C class. The product is added to your engine oil and results are achieved through driving the vehicle. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  13. Eamonn Power on February 17, 2017 at 1:55 pm

    I have a oil leak from crank seal on a ford fiesta 1.6 cdi zetac will your product solve my problem

  14. Ken on March 15, 2017 at 11:04 am

    Will this seal up the Crankcase halves on a 2011 Cadillac DTS

  15. Trapper Bates on April 19, 2017 at 12:23 am

    I have a 5.9 gas, Dodge 1999. I have a front engine oil leak. Is there anything i could use to soften the seal up, as the unit only has 78000 miles. We think this unit has been sitting for some time.

  16. Avinash on May 17, 2017 at 12:32 am

    I have an engine with folded crank seal…I mean my crank seal’s lips got folded
    Can your product reduce the leakage caused by improper placing of crank seal???

    • BlueDevil Pro on May 17, 2017 at 8:28 am

      Avinash-

      Unfortunately, the BlueDevil Oil Stop Leak would not be intended for crank seals lips that got folded. Having the seals placed properly would be your best option.

      Thank you!

      -BDP

  17. Andrew G on June 2, 2017 at 2:08 pm

    Will this work in a marine outboard engine? I have a Yamaha F350 that is leaking oil from the crankshaft seal. Can this product be used to stop this leak?

    • BlueDevil Pro on June 5, 2017 at 10:04 am

      Andrew-

      Yes, the BlueDevil Oil Stop Leak would treat the crankshaft seal in your marine outboard engine. You should expect to see results after about 1-2 hours of operation.

      Thank you!

      -BDP

  18. Alan on June 6, 2017 at 1:51 pm

    I have a 2003 vw 2.0. The camshaft seal is leaking-lots of oil comes out quickly. Will your product fix this leak?

    • BlueDevil Pro on June 6, 2017 at 3:43 pm

      Alan-

      Unfortunately, it sounds like you are losing oil too quickly for the product to be affective. Typically with the Oil Stop Leak, you would expect to see results after about 100-200 miles of driving. If you are losing oil to the extent that you would be losing your oil capacity before you get to 100-200 miles of driving, then you wouldn’t be able to keep the product in the system long enough in order to get the benefit of using it. A hard part repair may be your best option.

      Thank you!

      -BDP

  19. adam c on June 15, 2017 at 12:43 pm

    I’ve got a leaky front crankshaft seal on a 2001 Nissan xteria. You think Blue Devil can handle that

    • BlueDevil Pro on June 15, 2017 at 1:53 pm

      Adam-

      Thank you for asking about your Nissan Xterra. As long as you are not losing oil too quickly, you would be a great candidate for the BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/). You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  20. Michael on June 21, 2017 at 10:36 pm

    How long will it stop the leak? What about an oil pan gasket leak?

    • BlueDevil Pro on June 22, 2017 at 10:23 am

      Michael-

      Typically with the BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/), it would be around 100-200 miles of driving before you start to see results. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

      • Mike on June 22, 2017 at 5:12 pm

        I asked how long it will stop the leak, not how long until it stops the leak…but anyways, I’ll just call the number.

        • BlueDevil Pro on June 23, 2017 at 8:06 am

          Mike-

          Once the product seals, it would be a permanent seal.

          Thank you!

          -BDP

  21. John Hadler on July 10, 2017 at 9:38 pm

    I have a Chevy 5.7L V8 with an I/O on my Cruisers boat. It was recently rebuilt top to bottom however we now discover the new front main bearing seal is leaking. At idle it leaks 18 drops per minute. Since removal of the engine is a major undertaking – twin engines with i/o”s in a 34 ft express cruiser – wondering if your product might be a permanent fix? What do you think?

    • BlueDevil Pro on July 11, 2017 at 8:57 am

      John-

      Thank you for asking about your Cruisers boat. Based on your description, we recommend using the BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/). Once the product seals, it would be a permanent seal. You should expect to see results after about 1-2 hours of operation.

      Thank you!

      -BDP

  22. Matt on August 18, 2017 at 11:37 am

    I have a leak on the main crank seal in my Can Am Commander 1000. Will this stop the leak? I’ll be putting a new seal in but wondered if this stuff will aid in ensuring it won’t leak again.

    • BlueDevil Pro on August 18, 2017 at 2:45 pm

      Matt-

      Yes, the BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/) would be able to stop the main crank seal leak in your Can Am Commander 1000. As long as you are not losing oil too quickly, you would be a great candidate for the product.

      Thank you!

      -BDP

  23. Mike on September 19, 2017 at 9:00 pm

    New timing cover with new camshaft seal on a 1987 Ford 7.5 460.
    After 500 miles the seal is leaking.
    Will Blue Devil seal this leak?

    • BlueDevil Pro on September 20, 2017 at 9:17 am

      Mike-

      Thank you for asking about your Ford 7.5 460. Based on your description, we do recommend using the BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/). You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  24. Kyle Lens on December 12, 2017 at 4:45 pm

    Will this work on a 2006 Nissan XTerrra rear timing cover?

    • BlueDevil Pro on December 13, 2017 at 8:55 am

      Kyle-

      We recommend applying BlueDevil Oil Stop Leak (https://store.gobdp.com/oil-stop-leak-49499/) to seal your leak and stop the oil loss. Once added, you can expect to start seeing results after approximately 100 miles of driving.

      Feel free to contact us with any questions.

      Thank you!

      -BDP

  25. Ketumile Balesamang on December 20, 2017 at 10:49 am

    I need the product in Botswana, Do you have stores selling it

    • BlueDevil Pro on December 20, 2017 at 3:16 pm

      Ketumile-

      We do not currently have any retailers in Botswana but the product may be ordered directly through our website and shipped overseas to you. We have shipped our products internationally on numerous occasions. When placing the order through our website the shipping cost will automatically calculate during checkout after you have input your mailing address.

      The order may be placed here: https://store.gobdp.com/rear-main-sealer-00234/

      Thank you!

      -BDP

  26. Roger Fuentes on January 13, 2018 at 4:04 am

    2004 Kia Sedona will this help stop a recent leak coming from the engines main seal…and, can i pour a second bottle at the halfway of the 100-200 miles just for good measure?

    • BlueDevil Pro on January 15, 2018 at 8:40 am

      Roger-

      In most cases you will only need to apply 1 bottle of BlueDevil Rear Main Sealer to completely stop any oil leaks. However, if you wanted to add a 2nd application after roughly 200 miles that would not harm anything.

      Thank you!

      -BDP

  27. Thomas on March 31, 2018 at 10:43 pm

    I have a Nissan Xterra with the 3.3 V6. It appears the front crankshaft seal is leaking. The engine loses probably about a quart over the course of a 20 mile drive. Is this too severe for this product to work?

    • BlueDevil Pro on April 2, 2018 at 9:41 am

      Thomas-

      Thank you for asking about your Nissan Xterra. Based on your description, unfortunately, you may be losing oil a little too quickly in order for the BlueDevil Oil Stop Leak to be affective. Typically with the product, you would notice improvement after approximately 100-200 miles of driving. From the sounds of it, you may lose the product before it gets a chance to seal. A hard part repair may be your best option.

      Thank you!

      -BDP

      • Thomas on April 3, 2018 at 4:11 pm

        Thanks. I pulled the harmonic balancer off and discover the seal has a hole… The product should be able to handle any other oil leaks though

  28. Ubong Inokon on July 23, 2018 at 6:18 am

    I have a Mitsubushi Gallant V6 engine with a crankshaft seal leaking oil when the vehicle engine is warm.
    Please can this product work for me.
    Thanks

    • BlueDevil Pro on July 23, 2018 at 9:50 am

      Ubong-

      Thank you for asking about your Mitsubishi Galant. The BlueDevil Oil Stop Leak would be able to treat a leaking crankshaft seal. You should expect to see results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  29. Tyryn Garza on August 4, 2018 at 7:37 pm

    I have a 2006 Pontiac Grand Prix GXP 5.3L, and there is an apparent front crank shaft seal oil leak, so I was wondering if the Blue Devil Rear Main Sealer product will work on the Front main crankshaft seal?

    • BlueDevil Pro on August 6, 2018 at 9:31 am

      Tyryn-

      Thank you for asking about your Pontiac Grand Prix. Based on your description, we recommend using the BlueDevil Oil Stop Leak (https://store.gobdp.com/oil-stop-leak-49499/). BlueDevil Oil Stop Leak is more concentrated and is the universal application that will work for various leaks such as oil pan leaks, rear main leaks, valve cover gasket leaks, etc. Whereas the Rear Main Sealer is specifically formulated for only a leaking rear main seal. You should expect to see results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  30. Bob on April 15, 2019 at 3:07 am

    Would this work on a lawnmower

    • BlueDevil Pro on April 15, 2019 at 10:31 am

      Bob-

      Yes, the BlueDevil Oil Stop Leak (https://gobdp.com/product/oil-stop-leak-49499/) is safe and compatible to use on lawnmowers. For smaller oil capacities, use one oz. of the product per quart of oil in the system. You should expect to start noticing improvement after approximately 1-2 hours of operation.

      Thank you!

      -BDP

  31. tom on April 29, 2019 at 11:13 pm

    My 94 corolla wagon has an oil leak. A mechanic said it is from the cam seal. Will Blue Devil work on that? I tried AT 200 and Lucas and they did not work.
    Tom

    • BlueDevil Pro on April 30, 2019 at 9:45 am

      Tom-

      Thank you for asking about your Toyota Corolla. Yes, the BlueDevil Oil Stop Leak would be able to treat a leaking cam shaft seal. As long as the leak isn’t more than a seep or light drip, you would be a good candidate for the product. Being that you’ve already used a couple of different products, you would want to change the oil first prior to adding BlueDevil.

      Thank you!

      -BDP

  32. Paulias on May 28, 2019 at 4:42 pm

    I have a Toyota Hiace Bus with a 3L engine. My mechanic stated the ge noticed a speck of oil leak from the crankshaft seal. My question is;
    1. Will BlueDevil Oil Stop Leak stop the leak? &
    2. Do you have a distributor in PNG?
    Thanks.

    • BlueDevil Pro on May 29, 2019 at 8:59 am

      Paulias-

      Thank you for asking about your Toyota Hiace Bus. Yes, the BlueDevil Oil Stop Leak would be able to treat a leaking crankshaft seal. We do not currently have any distributors in PNG, however, the product can be purchased directly on our Amazon account.

      Thank you!

      -BDP

  33. Jim on June 23, 2019 at 11:23 am

    I have a generac generator that leaks oil from the front crankshaft seal, it can run for two hours before it shuts down for low oil. Will this help me?

    • BlueDevil Pro on June 24, 2019 at 9:44 am

      Jim-

      As long as the leak isn’t more than a seep, or lightly dripping, the BlueDevil Oil Stop Leak would be able to treat your leaking crankshaft seal. You should expect to see results after approximately 1-2 hours of operation.

      Thank you!

      -BDP

  34. Duncan on March 19, 2020 at 2:17 am

    Hi.. Do u have a product that would fix a leaking crank seal in a 2 stroke outboard..?? The bottom cylinder is running lean as a result of leaking seal.. The only oil in this motor gets added to the fuel..

    • BlueDevil Pro on March 19, 2020 at 11:18 am

      Duncan-

      Based on your description, we recommend using the BlueDevil Oil Stop Leak. You should expect to start seeing results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  35. John on March 24, 2020 at 8:50 am

    Does this product effect the turbo efficiency.

    • BlueDevil Pro on March 24, 2020 at 10:14 am

      John-

      The BlueDevil Oil Stop Leak does not harden or thicken in anyway. It would not adversely affect the system what so ever. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  36. Timothy E Pritchard on May 28, 2020 at 1:47 pm

    Will this work on a 2002 c240 front crankshaft seal? The crankshaft pulley actually goes through the seal and turns. Thank you.

    • BlueDevil Pro on May 29, 2020 at 9:23 am

      Timothy-

      Yes, the BlueDevil Oil Stop Leak is safe and compatible to use on your Mercedes Benz C240. As long as the leak isn’t more than a seep or light drip, you would be a good candidate for the product.

      Thank you!

      -BDP

  37. Appelberg Kaj on July 11, 2020 at 8:35 am

    Hi,
    I have an old MB 864 ab marine diesel in my boat and it has started to leak small amounts from the rear seal spraying it around engine room. Can your product fix the problem?

    • BlueDevil Pro on July 13, 2020 at 9:31 am

      Appelberg-

      Yes, BlueDevil is safe and compatible to use on your Marine Diesel. You will use one oz. of the product per quart of oil in the system, and should expect to start seeing results after approximately 1-2 hours of operation.

      Thank you!

      -BDP

  38. G Dam on August 22, 2020 at 9:48 pm

    2012 Volvo S60 T5 engine leak is this product a possible fix for this? Thanks

    • BlueDevil Pro on August 24, 2020 at 8:23 am

      G Dam-

      Yes, the BlueDevil Oil Stop Leak is safe and compatible to use on your Volvo S60. You should expect to start seeing improvement after 100-200 miles of driving.

      Thank you!

      -BDP

  39. Darin on September 10, 2020 at 12:03 am

    Is this product safe for use on Lycoming O/IO-320/360 4 cylinder aircooled engines?

    • BlueDevil Pro on September 10, 2020 at 8:19 am

      Darin-

      Yes, the BlueDevil Oil Stop Leak is safe and compatible to use on the engine you’ve described.

      Thank you!

      -BDP

  40. sheriff on September 25, 2020 at 12:30 pm

    I have replaced crank seal more than 5 times what could be the problem

    • BlueDevil Pro on September 30, 2020 at 7:45 am

      Sheriff-

      Are you doing the work yourself or having a certified mechanic replace the crankshaft seal? How often are you developing a leak? 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

  41. JONATHAN HAMMONDS on January 31, 2021 at 8:44 am

    I have a 2014 Toyota Tundra, 5.7 engine. It has developed the dreaded camshaft tower leak. Would this product stop that leak?

    • BlueDevil Pro on February 1, 2021 at 8:46 am

      Jonathan-

      BlueDevil Oil Stop Leak is only intended to treat rubber seals/gaskets. Unfortunately, a hard part repair may be your only option.

      Thank you!

      -BDP

  42. MARK EVAN CLINE on February 15, 2021 at 10:51 am

    have old 4 cylinder tractor that I just finished restore and front crank seal is leaking. Would this work without setting up in crank journals.

    • BlueDevil Pro on February 15, 2021 at 1:38 pm

      Mark-

      Yes, the BlueDevil Oil Stop Leak would be able to treat your leaking crank seal. The product works by revitalizing and reconditioning Shrunken/deteriorated rubber seals. It would not gum up or coagulate in anyway.

      Thank you!

      -BDP

  43. Candice on February 18, 2021 at 1:21 pm

    Will this work on the front seal of a 94 Honda Accord? The oil was on the ground when i came outside

    • BlueDevil Pro on February 18, 2021 at 1:51 pm

      Candice-

      Yes, the BlueDevil Oil Stop Leak would be able to treat the front seal on your Honda Accord. You should expect to start seeing results after 100-200 miles of driving.

      Thank you!

      -BDP

  44. Christopher Rowey on June 14, 2021 at 7:14 pm

    Will one of your products work on a Universal Diesel 25XP. My front seal has devopled a leak.

    • BlueDevil Pro on June 15, 2021 at 8:57 am

      Christopher-

      Yes, the BlueDevil Oil Stop Leak is safe and compatible to use on your Universal Diesel. You will use one oz. of the product per quart of oil.

      Thank you!

      -BDP

      • Jim on September 30, 2021 at 9:57 am

        Fitted new rear crankshaft seal on ford 4 cylinder tractor ,now leaking
        .will it work on this

        • BlueDevil Pro on October 1, 2021 at 8:16 am

          Jim-

          The BlueDevil Oil Stop Leak is intended to revitalize/recondition rubber seals and gaskets. It would not have much effect on a new rubber. If you are not 100% sure where the leak is coming from, it would be safe to use the BlueDevil Oil Stop Leak. The product is a universal application and would be able to treat any of the rubber seals/gaskets throughout the fluid oil system.

          Thank you!

          -BDP

  45. Terry on October 5, 2021 at 11:40 pm

    Hi I have a 2000 6 cylinder I tech Ford falcon with a front crankshaft oil leak can I use your product to fix this

    • BlueDevil Pro on October 6, 2021 at 8:00 am

      Terry-

      Yes, the BlueDevil Oil Stop Leak would be able to treat the leaking crankshaft seal on your Ford Falcon. You should expect to start seeing results after 100-200 miles of driving.

      Thank you!

      -BDP

  46. Monette SainteMarie on July 14, 2022 at 10:42 pm

    Hello – Can I use this to seal the RH crankcase leak on a 2018 Genuine Buddy 125?

    • BlueDevil Pro on July 15, 2022 at 8:06 am

      Monette-

      Yes, the BlueDevil Oil Stop Leak is safe and compatible to use on your Genuine Scooter. You would use one oz. of the product per quart of oil. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

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