How Do I Fix A Rear Main Seal Leak?

Replacing a rear main seal is a big job.  Rear Main SealsYour car or truck engine has a lot of seals to keep engine oil in its proper passages and from leaking out (as you know we have an oil leak sealant for many of these problems).  The rear main seal is the rear seal for the crank shaft in your engine.  It’s a very important seal since it is so low on the engine a significant amount of oil can quickly leak from it allowing your engine oil levels to get dangerously low before you have time to add more oil.

The rear main seal is also one of the most difficult seals on an engine to replace.  Since it seals the crank shaft and is at the rear of the motor, the transmission will need to be removed to get to the rear main seal and in most cases the crank shaft will also need to be removed.  Many mechanics will not replace the rear main seal in a motor without removing the motor from the vehicle and doing at least a partial rebuild.

Letting your rear main seal continue to leak also can be detrimental to your vehicle’s continued operation.  Besides having a low oil level, the leaking oil will be spread on the underside of your car as you drive.  Not only is this messy and difficult to clean up, the oil can get onto your exhaust system causing it to burn which can be a fire hazard and cause an unpleasant odor.

Why does a rear main seal start to leak?

Rear Main Seal Installation

  • Normal Wear and use
  • Sealing material compressing over time
  • Improper installation after a rebuild

The best way to repair a rear main seal is to recondition the seal that is currently in your vehicle.  BlueDevil Rear Main Sealer works to swell the rear main seal in your car stoping the leak.  BlueDevil Rear Main Sealer can extend the life of the current seals bringing your vehicle back to safe operation and saving you money!

You can purchase BlueDevil Rear Main Sealer directly from the manufacturer here: Transmission Sealer, or at your local parts stores:

  • Advance Auto Parts
  • Bennet Auto Supply
  • Prime Automotive
  • Pep Boys
  • O’Reillys Auto Parts
  • Auto Zone
  • NAPA

BlueDevil Rear Main Sealer

Pictures provided by www.ehow.com and www.cdxetexbook.com.

138 responses to “How Do I Fix A Rear Main Seal Leak?

  1. I have a 1982 Suzuki 850 the gaskets on the motor is leaking will you rear main sealer work on motorcycles?

        1. Marcus-

          Yes, the BlueDevil Head Gasket Sealer will work to stop the coolant from leaking into your engine oil. For best results, you will want to change your oil before and after the BlueDevil process.

          -BDP

      1. We have a Freightliner Cascadia with a Detroit DD15 engine rebuilt approx 18 months ago. There is an oil leak coming out from the top of the rear main structure, or possible back of engine head. Before we go and have this tore apart do you think the Blue Devil might help reseal this problem?

        1. Patty-

          Thank you for asking about your Freightliner Cascadia. Based on your description, we recommend using the BlueDevil Rear Main Sealer. As long as you are not losing oil too quickly, you would be a great candidate for the product. You should expect to see results after about 100-200 miles of driving.

          Thank you!

          -BDP

    1. I have a 2009 BMW X5 that was not having any problem that I know with oil leaks until my last oil change. I put dye in it and the tech said tht either my oil pan gasket or my rear engine gasket was leaking. It is a very small leak, but it does show up after a day or so sitting after being run on the highway. What should I use?

      Also, many people are saying that this causes all my gaskets to swell slightly and wear out faster. Am I sacrificing everything in the long to solve one small leak now?

      1. Bob-

        Thank you for asking about your BMW X5. Based on your description, we recommend using the BlueDevil Oil Stop Leak. The Oil Stop Leak is the universal application and will work for oil pan leaks, rear main leaks, valve seal leaks, transmission leaks, power steering leaks, etc. Whereas the Rear Main Sealer is specifically formulated for the rear main seal. If you are not sure where the vehicle is leaking or there seem to be multiple leaks I would recommend using the Oil Stop Leak.
        The product will revitalize and recondition the rubbers in the system back to their original state, however, it would not over-swell or over-expand them. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

    2. Hi there, I have 2006 chevy Aceo, its leaking a little bit and leaving spots on my parking everyday. i got it checked. its a rear main seal. Mechanic said it will cost me around $900. Will Bluedevil work for me?

  2. Dealer needs $926 to repair rear main seal and $203 to repair right front axle. Will your product work to repair and stop those leaks so the transmission does not need to be removed? How does your product compare to “Bars Leaks?”

    1. Tim-

      Yes, the BlueDevil Rear Main Sealer would be appropriate to use in stopping these leaks. The product carries a success rate of around 95%. As long as you are not dealing with a fairly large leak then BlueDevil should have no problem sealing the leaks.

      Feel free to contact us with any questions.

      1. The Mechanics Stated I had rear main crankshaft seal Leak, It 2002 Dodge Ram,do you think Your Product will stop My Leak, And We’re Do I apply It

        1. Larry-

          Yes, the BlueDevil Rear Main Sealer is compatible with your Dodge Ram. As long as you are not losing oil too quickly, the product should be able to help seal your leak. Typically, you should expect to see results after about 100-200 miles of driving.

          Thank you!

          -BDP

    2. I have a 2003 Ford Windstar van, my mechanic said my rear main seal is leaking, he is putting in a ” solution ” to try and seal it, if it doesn’t work, is it worth it to fix given the year and 193,000 kilometers on it…he said its a big job and costly…thank you…could you reply asap, he has it up on a hoist as I’m texting thisVh

    1. Kameel-

      You will simply add 1 bottle of BlueDevil Rear Main Sealer into your engine oil. The product can be purchased locally through AutoZone, O’Reilly Auto Parts, NAPA, and/or other independent parts stores.

      Thank You,

      -BDP

  3. I have 2005 dodge durango… the rear defferential pinion seal leaked all the oil out…the back wheels wouldn’t move because of the seal …I was told…can blue devil repair it??

    1. James-

      If it is leaking completely down then it may be a leak that is a little bit too extreme for what BlueDevil is intended to fix. The problem may be that you would lose the product to quickly for it to take effect.

      We wish you the best of luck in getting the leak stopped.

      -BDP

  4. Hello! My 94 Buick LaSabre was overfilled with oil and possibly messed up the seals! I have blue smoke coming from my tailpipe every now and then, but the water isn’t mixing with the oil which would indicate blown head gaskets! Could it be just the seals? Should I try Blue Devil to see if the smoking stops?

    1. Brandy-

      The blue smoke would indicate that you are burning engine oil. You may use the BlueDevil Oil Stop Leak but you will first want to ensure that the engine oil level is at the proper mark.

      -BDP

  5. I have an older Porsche 911 air cooled engine, I have a rear main going out and it has about 3 silver dollar spots every day under the rear main area. The car uses 11 quart system, has external oil lines to a front cooler. Will your product work on it or is this to expensive of an engine to put this in.

  6. Hi. I just bought my daughter a used 2000 Suzuki Grand Vitara for her “first car.” I bought it for a song from a dealer with 160,000 miles on the engine. We drove it for about 400 miles and we started/shut-off the engine approximately 10-20 times during that 400 mile period without any issues. I decided we better get the oil changed because I didn’t know when it was last done. When finished, we immediately noticed a STRONG burning oil smell. We returned to the oil change place, and they said the filter was replaced correctly and noticed no low oil, but we noticed drips on the garage floor. We’ve since put 320 more miles on it, and its about a 1/2 quart low. There is no smoke coming from the engine or exhaust. It starts, runs, and drives GREAT, but the burning oil smell is SO strong, so we know it’s leaking from SOMEWHERE. I’d really hate to have to get rid of this car or put a huge amount of money into it. Could this product work for us? Thank you for your time. -Paula

  7. I have a Mini Cooper 2007 with 77K. Diagnosed with a Rear main seal leak. How much quantity of your product should I use?

  8. What if any difference is there between Blue Devil oil stop leak and Blue Devil rear main sealer? I have a 2001 Tahoe with 178K miles on it with what appears to be a main seal leak.

    1. Dave-

      The Oil Stop Leak is the universal application and will work for oil pan leaks, rear main leaks, valve seal leaks, transmission leaks, power steering leaks, etc. Whereas the Rear Main Sealer is specifically formulated for the rear main seal. If you are not sure where the vehicle is leaking or there seem to be multiple leaks I would recommend using the Oil Stop Leak. However, in your case it sounds like you are fairly certain that the rear main is leaking; if that is the case then we recommend adding the BlueDevil Rear Main Sealer.

      -BDP

    1. Mike-

      If you have a leak from both the oil pan gasket and the rear main seal then we recommend using 1 bottle of the BlueDevil Oil Stop Leak. This will address multiple leaks in the system.

      -BDP

  9. I own a 2002 Cadillac Escalade SUV, I’ve had it professionally looked at by a mechanic. The rear main seal is leaking and my head gaskets. I have personally put 255 thousands miles on it. Which product do you recommend to keep me going for another 50 – 75 thousands miles with limited leaks. PS: My SUV just started leaking. The leaks form overnight in the driveway.

    1. James-

      For the oil leak coming from your rear main seal we recommend adding 1 bottle of the BlueDevil Rear Main Sealer; you should notice results after about 100 miles of driving.

      As for the head gasket leak, you should use the recommended amount of the BlueDevil Head Gasket Sealer.

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

      Thank You!

      -BDP

  10. I have a 1998 Jeep Grand Cherokee, 140K miles, 4.oL.
    Car has been babied since new.
    I now have minor , but obvious, leaks – valve cover, rear main seal, and oil adaptive seal. Should I go with the general leak stop, or use the main seal product (or both)?

  11. i have a 1989 260e benz the rear main seal is leaking how many bottle should i use in it and friend told me when i put it let it run for one hour thanks

    1. Mike-

      We recommend adding one eight ounce bottle of the BlueDevil Rear Main Sealer to the oil in your BMW. You should expect to see results after about 100 miles of driving.

      Thank You!

      -BDP

  12. my rear main seal on my 1989 260e benz leaking can i use bottle 1and half or 2 bottle to stop the leak the first bottle would leak out trying to stop the leak so do i need to ad 1 more bottle to seal it.

    1. Mike-

      If the leak seemed to improve after the first application then we would definitely recommend adding 1 more bottle of BlueDevil Rear Main Sealer to stop the leak. If you did not see any improvement then it may be a leak that is just too large for what BlueDevil is intended to fix.

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

      -BDP

  13. I have a 2003 jeep grand Cherokee 4.0!! I have took it to 3 machine shops and they told me that it’s the rear main seal. One of the shops told me the leak is small!! What do you recommend?

  14. I understand how the product works, my question is should i add the blue devil before i do my oil change (about 400 miles overdue) or after with the fresh?

  15. Does this product work with commercial vehicles? If so how much should be used. I have a slow rear main seal leak. Low oil pressure.

    1. Eli-

      Yes, the BlueDevil Rear Main Sealer has and will work in commercial vehicles. You will want to be sure you use the proper amount of BlueDevil as some commercial vehicles will carry a larger oil capacity. You should use 1 ounce of BlueDevil per every 1 quart of oil capacity.

      Thank You!

      -BDP

  16. do i have to add blue devil sealer or rear main sealer to every time i change my oil or it s used once for a permanent seal

  17. I have 2004 mercedes c240 4matic and i have rear end seal leak just after driving for comple hours
    I alredy buy blue devil rear seal stop leak i just nead to know how much i should add to my Oil to make product work on my car

    Tanks for your answer

  18. rebuilt big block chevy; , a thorough pain cause not matter how careful I am in assembling, the split rear main seal will drip. this is brand new, not old with many miles. Will your stop leak work?

    1. Dave-

      Yes, we have had customers previously use the BlueDevil Rear Main Sealer on a similar issue with success. You should notice results after about 100 miles of driving with the Rear Main Sealer in the oil.

      Thank You!

      -BDP

  19. My 1999 Acura Integra LS is leaking from the rear main seal. Since it’s oil capacity is 4 quarts, should I only use half the bottle?

    1. Alex-

      Yes, your Acura will only require 4 ounces of BlueDevil Rear Main Sealer based on the oil capacity. You should notice results after about 100 miles of driving.

      Thank You!

      -BDP

  20. So I’m looking at a suburban to buy and the person says the rear main seals needs to be fixed but says it doesn’t need to be done right away. What do you think if the car is $2,000 and the rear main seal needs to be replaced is it worth it?

    1. Donovan-

      This is a question that a lot of people face when an older vehicle requires an expensive repair. We actually manufacture a product called the BlueDevil Rear Main Sealer that is specifically designed to stop leaking rear main seals. The product can be purchased through AutoZone, Advance Auto Parts, O’Reilly Auto Parts, and many other auto part retailers.

      More information about BlueDevil Rear Main Sealer can be seen here: http://store.gobdp.com/rear-main-sealer-00234/

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

      Thank You!

      -BDP

  21. I need HELP…..I have 2002 Tahoe ..with 110,500 miles,
    10/2014 see smal oil leaking under oil pan to the foor , dealer said oil leak from AXLE SEAL cost $358.60
    Stil see oil leaking drop on same play, dealer said oil leak from OIL PAN GASKET COST $ 599 3 day later
    5/13 Again see oil leaking same place..now dealer said …leak from REAL MAIN SHIEL cost $1200
    Can I use your..BlueDevil Rear Main Sealer To seal the rear main seal And stoping the leak…and not have to give them any more money..because I think ..they just fishing one by one and is costing so money that I don’t have.. …HELP…KIM

    1. Kim-

      We recommend adding 1 bottle of the BlueDevil Oil Stop Leak rather than the Rear Main Sealer. The BlueDevil Oil Stop Leak will treat the rear main seal as well as the other leaks you are experiencing. Once the Oil Stop Leak is added you should notice results after about 100 miles.

      Thank You!

      -BDP

    1. Kris-

      You will want to add 1 ounce of BlueDevil to every 1 quart of oil capacity. For instance, if your vehicle holds 8 quarts of oil then you will add 8 ounces of BlueDevil Rear Main Sealer.

      Thanks!

      -BDP

  22. I have a 1987 Dodge Dakota and I’m being told my rear main oil seal is the problem, would your product be a plausible remedy?

    1. Darren-

      We recommend adding one 8 ounce bottle of the BlueDevil Rear Main Sealer. Once it is added you should notice results after about 100 miles of driving. The product can be purchased locally through AutoZone, O’Reilly Auto Parts, Advance Auto Parts, and other auto parts retailers.

      Thank You!

      -BDP

  23. 2002 Chevy Tahoe Z71
    After replacing the rear main seal my truck isn’t accelerating properly. Mechanic dropped the transmission and put it back afterwards. What could the problem be?

  24. I have a 2003 bmw 5 series it’s been leaking (not extensively) as its gotten older would it be safe for the car to use this product as it has quite over 100 thousand miles on it?

    1. Colstin-

      Yes, it would be 100% safe to use in your BMW. Once the BlueDevil Rear Main Sealer is added, you should start noticing results after about 100 miles of drive time.

      Thank You!

      -BDP

  25. I have honda odyssey 2000 how much I have to put in? I have front main seal leaking has 240 000 miles!!

    1. Everado-

      We recommend adding one 8 ounce bottle of the BlueDevil Oil Stop Leak. This should remedy the oil loss. You should notice results after about 100 miles of driving.

      Thank You!

      -BDP

  26. I added BlueDevil Rear Main Sealer to my 1999 Toyota Camry after the shop informed me that the vehicle had a leak and the repair would cost me over 3,000 dollars. I would drive the car for 100 miles and let you know how your product performed.

  27. I have 2006 BMW that is leaking oil engine from oil pan or some other part, should i need to add 1 or 2 bottles of BD oli stop leak? does your product will work in those engines and syntetic oil without problems?

    thnks

    1. Jose-

      You will need one 8 ounce bottle of the BlueDevil Oil Stop Leak. The product is compatible with both conventional and synthetic oils. Once added, expect to notice results after about 100 miles of driving.

      Thank You!

      -BDP

  28. I have leak in my 2007 Mini Cooper S model. I am not sure where the leak is coming from yet. My main concern is putting an oil additive in this engine since it had a turbocharger. As I understand it, the turbo uses the engine oil for lubrication too. Is Blue Devil safe in a supercharged engine? Is there any risk to the turbo? Owners manual advises not to use additives. I want to be safe.

    1. Bill-

      Yes, the BlueDevil Rear Main Sealer is 100% safe to use in vehicles with superchargers. The BlueDevil Rear Main Sealer never thickens or hardens so there is no risk in adding it to your engine.

      Feel free to contact us at 888-863-0426 (Mon – Fri, 8:00 AM – 5:00 PM EST) with any further questions.

      Thank You!

      -BDP

  29. Would this product work on a H22 VTEC motor? I only ask because does it seal up other oil passages? I am only leaking oil from the rear main seal alone but I don’t want my VTEC to stop working suddenly because it seal up other oil passages which the VTEC motor has a lot of and is crucial for VTEC to work.

    1. Meng-

      Yes, the BlueDevil Rear Main Sealer will work in a H22 VTEC engine. The product will not thicken or harden in anyway and is 100% safe for your engine.

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

      Thank You!

      -BDP

      1. I don’t know if this is true but I heard that your product expands seals (I assume rubber seals and gaskets). Will it expand any other seals etc? I am afraid to use this product because I don’t want other seals to expand and cause more problems then what I already have. I’m leaking about half a quart a month but do not have the funds to replace to rear main seal at the moment. Can I get a guarantee that this will not harm or cause any other problems besides fixing the leak in my rear main seal?

        1. Meng-

          The expansion is very minor when the BlueDevil Rear Main Sealer is effecting the seal. It is only reacting with the seal that currently has the leak; the BlueDevil will absorb into that seal/gasket as the fluid leaks from the system. We do guarantee that it will not harm the engine in any way.

          Once the BlueDevil is added you can expect to notice results after about 100 miles of driving.

          Thank You!

          -BDP

  30. i have a 216 motor on my 46 chevy, would like to use this product to see if it remedies the common leak on a 216 motor for that era. i did a oil gasket change but i think when the car is stopped it leaks a little maybe some more when its driving. how much do i pour in?

  31. hello. I have a 2010 toyota camry with 153,000 miles on it. synthetic oil changed every 10,000 miles. the shop I use for repairs, basically alignments, and oil changes said they noticed a small leak in the rear main seal at the 1st time I used them last year, then the 2nd oil change said nothing, now today, 9/11/15 they said they noticed it again. there are no oil stains in the driveway and the oil level has not moved in 10,000 miles. I check the oil once a month and have never had to add any. my question is, should I add the BD rear main seal? and the car is a 4 cyclinder–how much would I need to add if so? I just had the oil changed today–thanks

    1. John-

      Thank you for asking about your Toyota Camry. Based on your description, we would recommend using the BlueDevil Rear Main Sealer. You will use one ounce of the product per quart of oil in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

    1. Norm-

      Yes, the BlueDevil Rear Main Sealer should have no problem stopping a small engine oil leak. Once the product is added you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

    1. Martin-

      You are fine to add the product to the oil already in your system. Typically, you would start to see results after around 100-200 miles of driving, so if you are due to have the oil change in the near future, you would want to change the oil first. Otherwise, you are fine to add it to you existing oil.

      Thank you!

      -BDP

  32. Will the rear seal stop leak work on an older engine? 1974 Dodge 318Cid engine. Would the product still work with the old rubber from those days?

    1. Joe-

      Yes, the BlueDevil Rear Main Sealer will work in your 1974 Dodge. Once the product is added you can expect to start noticing results after about 100 miles of driving.

      Thank you!

      -BDP

  33. First I know nothing about cars. But I just had my manifold replaced and was told I have a rear seal leak and that I should add oil every month. Would your real seal leak product help? And how much should I use and how often. I have a 2001 Nissan Xterra. Thanks.

    1. Susan-

      You would be using one ounce of the BlueDevil Rear Main Sealer per quart of oil in the system. As long as you are not losing oil too quickly, not more than seeping or dripping, then you would be a good candidate for the product. Once the product seals, it would create a permanent seal, so you would only need to add the product once.

      Thank you!

      -BDP

  34. Hey i have a 2007 Yukon Denali rear main seal is leaking and I was told if I use a stop leak fluid it could blow my engine up
    And at the shops wants 2000$ to repair the leak it I only us to add a little bit
    Of oil for the first time since I’ve Owend it any ideas

    1. Moe-

      You are safe to use the BlueDevil Rear Main Sealer for your Yukon Denali. The product doesn’t harden or thicken up in any way, so it would not cause any adverse effects on your engine. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  35. I have a rear main seal leak in my 2011 Mercedes Benz 350 ml deseil bluetech . Will Blue devil work with my turbo and deseil engine? The vehicle has 60,000 miles on it my mechanic said the rear main seal is defective since the car is just has 60,00 miles.

    1. Sandra-

      Yes, the BlueDevil Rear Main Sealer can be used in your vehicle. The product will not harden or thicken up in any way, so it would not cause any adverse effects on the engine or the turbo.

      Thank you!

      -BDP

  36. I have an oil leak between my engine and transmission. my car is a 2003 bmw 325xi. to fix this, it will cost me over $1000. it’s not worth it. will Blue devil seal this leak?

    1. John-

      Based on your description, we would recommend using the BlueDevil for the leak in your BMW. Typically you should start to see results after about 100-200 miles of driving. As long as you are not losing coolant/water too quickly, you should be able to see some good results from the product.

      Thank you!

      -BDP

  37. I have a 1994 ford f450 tow truck with 289,890 miles on it. This truck has been drivin by dad and I, but now the rear main started leaking overnight. Although it has a ton of miles I will not ever get rite of it. I use it as my everyday driver. We r getting ready to redo the whole rear towing body and want to know if your product will buy me some time till I can pull the motor. Thank you in Advance

    1. Richard,

      Thanks for your question about your F450, it sounds like a great tow truck! To answer your question, yes BlueDevil Rear Main Sealer will restore the rear main seal in your engine to stop the leak so you can continue to drive your truck!

      Thanks again for your question!
      -BD Auto Pro

  38. BOUGHT A 1929 RAT WITH A FORD 312 Y BLOCK AND IT LEAKS LIKE HELL. WENT AND REBUILT THE ENGINE AND THE REAR MAIN STILL LEAKS. SO TOOK THE ENGINE OUT AGAIN AND I WAS TOLD TO USE A ROPE OR ASBESTOS REAR MAIN SEAL MORE FOR THIS YEAR ENGINE, GOT IT IN DROVE IT LAST NIGHT AND THE REAR MAIN STILL LEAKS. WILL YOUR PRODUCT WORK ON A PROBLEM MOTOR LIKE THIS?

    1. Garry-

      Unfortunately, BlueDevil is not made to work on rope seals. It is specifically designed to work on rubber seals/gaskets. The only solution may be to have the seal replaced.

      Thank you!

      -BDP

  39. I’ve added the BD rear main sealer to my 1995 Ford explorer and I’m approaching 300k miles. It’s been about 250 miles since the addition and there’s still a leak. Can I add the product again as it may have leaked to quickly to take effect?

    1. Brandon-

      Based on your description, unfortunately, we would not recommend adding a second treatment to your Ford Explorer. The product is intended for leaks that are seeping or dripping out. If you are losing oil too quickly, you would lose the product just as quickly and would never get the benefit of having it in the system. Please contact our technical support line at 888-863-0426 so that we may assist you with the warranty information.

      Thank you!

      -BDP

  40. I have a 2002 Tahoe that is dripping oil at either the rear of the pan gasket or the rear main seal. Would you suggest I use the rear main seal treatment or the oil stop leak treatment? Also, is this a permanent fix or should I look at selling the vehicle soon afterwards?

    Thanks,

    1. Clay-

      The BlueDevil Oil Stop Leak is the universal application and will work for oil pan leaks, rear main leaks, valve seal leaks, transmission leaks, power steering leaks, etc. Whereas the Rear Main Sealer is specifically formulated for the rear main seal. Because you are not 100% sure where the vehicle is leaking we recommend using BlueDevil Oil Stop Leak. The BlueDevil is a permanent repair.

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

      Thank you!

      -BDP

  41. a mechanic told me that my car has oil leaks in timing case and rear main, however i dont see any leaks under the car and my engine oil is not decreasing also. But if my car is leaking oil, is bluedevil going to be able to stop the leaks? Thanks in advance.

    1. Tim-

      Thank you for asking about your Ford Ranger. Replacing the rear main seal yourself will save yourself a lot of the cost, as this is a very labor intensive procedure. The parts for the job can cost anywhere from $30-$60, depending on your location. Usually, it would take about 5-6 hours of labor to complete the repair.

      Thank you!

      -BDP

  42. I have a 1991 Suzuki sidekick, most likely a leak in the rear main seal, where in western Canada can I find this? namely Vancouver Island BC

  43. I had my 2001 Porsche RMS replaced 5 yrs ago, and we have a small leak again. Mechanic said it was from the rear main seal.
    How effective would your product be in stopping this leak permanently? I don’t want to replace it again.
    Thanks, john

    1. John-

      Thank you for asking about your Porsche. As long as you are not losing oil too quickly, you would be a great candidate for the BlueDevil Rear Main Sealer. You should expect to see results after about 100-200 miles of driving. Once the product seals, it would be a permanent seal.

      Thank you!

      -BDP

  44. Do you only need to use it once or every time you change your oil? I have a rear main seal leak in a 1965 Cadillac 429 V8 (First leak she’s ever had!) – Will this work with her older style seals?

    1. Eric-

      Thank you for asking about your Cadillac 429. Typically, you should only need to add the product once. Once it seals, it would be a permanent seal, so it is not the kind of thing you would have to add with every oil change. The product is only intended for rubber seals. Some older vehicles use cork or paper seals, which the product would not have any affect on. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  45. Hello, I have 2002 Suzuki Grand Vitara xl 7 and I just found out that my car have oil leaking from gasket between lower crankshaft support and cylinder block! What of your products you will recommend in that case? Thank you very much!

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