Rear Crankshaft Seal Leak

#driveyourlife

rear crankshaft sealYour engine is full of all sorts of different seals and gaskets.  Your engine is designed to run best while it is well lubricated with engine oil.  This oil is stored at the bottom of your engine in the oil pan.  From there it is suctioned by the oil pump, pressurized, sent through the oil filter then on to do its job lubricating the engine components.  For a more in-depth explanation of the route the oil takes in your engine, check out this article about Where Engine Oil Goes.  Understanding the long route the oil in your car takes makes accepting that your vehicle has an oil leak a little easier.  The seals and gaskets in your motor have a big job keeping the hot slippery oil contained as it travels around your engine.  The rear crankshaft seal is no exception to this as it has one of the most difficult jobs in your engine.  Where the rear crankshaft seal is an exception, is that it is the most difficult seal to change in your engine.

Many oil leaks are extremely simple fixes and can be very inexpensive, or even maintenance items that can be easily done yourself in your driveway with a small toolkit and an hour or so.  Leaking gaskets like a leaky valve cover gasket, valley pan gasket, or timing chain cover are on the top or front of your engine so they’re often easily accessible.  These components also aren’t complicated or difficult to remove so the time, and therefore cost, to replace them is relatively small.

There are also more challenging oil leaks to repair on your vehicle.  Leaks like a camshaft seal leak or oil pan gasket leak on some cars can take a little more expertise and time to replace.  These leaks often take a little more skill to replace as they may require the removal of some other accessories or peripheral equipment to access them.

On the other hand, a rear crankshaft seal is the most challenging seal in your engine to replace.  This is because at the very least it will require removing the transmission from your vehicle and at most will require removing the entire engine.  Removing either the engine, the transmission, or both from your vehicle are some of the most complicated maintenance procedures you can perform on your car.  Removing such equipment requires a significant amount of knowledge about the construction of your car but will also require lots a few specialty tools including lifts and hoist and specialty wrenches to reach some of the hidden bolts and nuts holding things together.  Of course, once you’ve got the engine and transmission out you still need to skills to replace the rear crankshaft seal.

Many oil leaks in your engine can be inexpensively fixed by simply replacing the seal or gasket.  Since the rear crankshaft seal is not one of those that is simple to replace, it can be much more cost effective to simply repair that seal allowing the original seal to stay in place while still stopping your leak.  The easiest way to repair your rear crankshaft seal is to simply add BlueDevil Rear Main Sealer to your engine oil and continue to drive your vehicle like usual.  After approximately 2 days of drive time, BlueDevil Rear Main Sealer will restore your rear crankshaft seal to its original size and shape sealing the leak and keeping your car safe.

For more information about BlueDevil Rear Main Sealer click on the banner below!
BlueDevil Rear Main Sealer
 

 

You can also find BlueDevil Rear Main Sealer 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
  • Fisher Auto Parts stores
  • Auto Plus Auto Parts stores
  • Hovis Auto & Truck Supply stores
  • Salvo Auto Parts
  • Advantage Auto Stores
  • Genuine Auto Parts stores
  • Bond Auto Parts stores
  • Tidewater Fleet Supply
  • Bumper to Bumper Auto Parts
  • Any Part Auto Parts
  • Consumer Auto Parts

 

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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.

14 responses to "Rear Crankshaft Seal Leak"

14 Comments

  1. William on August 10, 2017 at 10:41 am

    Hi, where can you buy in Brisbane QLD Australia please.Which stores etc?.

    • BlueDevil Pro on August 10, 2017 at 11:13 am

      William-

      We do not currently have any distributors in Australia. However, you may purchase products directly through our website, gobdp.com. Simply fill in the billing and shipping fields and the order total would be calculated at checkout.

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

      Thank you!

      -BDP

    • Lisa n on February 8, 2022 at 7:58 am

      Have a oil leak near crankshaft, it’s a 2007 highlander, which blue devil should I use, and will this product make it harder for someone to replace the crankshaft or seal I. The future.

      • BlueDevil Pro on February 8, 2022 at 9:09 am

        Lisa-

        Thank you for asking about your Toyota Highlander. We recommend using the BlueDevil Oil Stop Leak for the leak you’ve described. The product does not harden or thicken in anyway, so it would not cause any adverse reactions. Using the product would not make it any more difficult to perform potential replacements down the road.

        Thank you!

        -BDP

  2. Josh on August 17, 2017 at 1:47 am

    Of the engine doesn’t hold oil do I fill it with oil before adding blue devil?

    • BlueDevil Pro on August 17, 2017 at 9:19 am

      Josh-

      Yes, the system would be filled almost to capacity with oil, leaving just enough room for the recommended amount of the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  3. Allison Schneider on October 12, 2018 at 7:24 pm

    What if after it has been added and driven 150miles it’s still leaking?

    • BlueDevil Pro on October 15, 2018 at 9:12 am

      Allison-

      Typically with the product, you should expect to see results after approximately 100-200 miles of driving. Have you noticed any improvement? 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

  4. Nate Gray on January 8, 2019 at 4:34 pm

    I added the oil stop leak to my vehicle for crankshaft seal leak. My question is will this stop that leak or should I have used the rear main seal. I didnt realize when I bought it that the rear main seal was designed for crankshaft seal leaks.

    • BlueDevil Pro on January 9, 2019 at 8:18 am

      Nate-

      The BlueDevil Oil Stop Leak is the appropriate product to treat a crankshaft seal leak. You should expect to see results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  5. Brinda Ortiz on May 20, 2019 at 11:05 am

    Hi I have a Kia Amanti and I have a rear crankshaft leak on the endcap. The leak is not where the belt is but the other end. I am in the process of replacing the valve cover gaskets and while the car is still siting in my driveway it is leaking oil slowly at the cap. Next will be an oil change flush but when that is done and get fresh oil how much of Daredevil rear crankshaft product can I use? And is this a guarantee that it will seal?

    • BlueDevil Pro on May 20, 2019 at 11:10 am

      Brinda-

      Thank you for asking about your Kia Amanti. One bottle (8 oz.) of the BlueDevil Oil Stop Leak will treat 4-6 quarts of oil. The product carries a money-back guarantee, so if it is unable to seal for whatever reason, you can simply contact our technical support line at 888-863-0426 for further assistance.

      Thank you!

      -BDP

  6. Patrick Poirier on June 9, 2019 at 8:15 pm

    I have a front crankshaft leak on a 4,3l mercruiser. What is the product I should use?

    • BlueDevil Pro on June 10, 2019 at 9:40 am

      Patrick-

      The BlueDevil Oil Stop Leak would be the appropriate product to use for your leaking crankshaft seal. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

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