Rear main seal repair may be much easier than you think. Most people are asking if they should replace their rear main seal, or even rebuild their motor and both of these are relatively difficult tasks due to the location of the rear main seal. The rear main seal in your vehicle is sandwiched in between your engine and transmission. It is actually a seal in your engine that seals where your crankshaft exits the engine. The crankshaft then has the flywheel or flexplate bolted to it and the transmission is connected after that.
Almost all the oil seals in your vehicle are the relatively similar. Oil seals can be made from a wide variety of compounds based on the chemicals they are designed to seal and the temperatures they will operate at. Materials like Viton, nitrile and silicone can be used, but most automotive oil seals are made from rubber or PTFE. Rear main seals, like any shaft seal, is designed to press into the stationary housing around the shaft, in this case, the engine block, so the seal is constructed slightly bigger than the opening. The seal is also designed to hug the shaft as it rotates so it needs to be tight enough to stop fluid from escaping and contaminants from coming in. It also needs to be loose enough to allow the shaft to spin with as little friction and wear as possible. The size of the seal opening is carefully designed around the shaft to accomplish this balance. Shaft seals are also often fitted with small spring inside the lip to help hold the lip of the seal on the shaft and create a better seal.
As we said, the placement of the rear main seal makes replacement a difficult task. It is possible in some cases to replace the rear main seal with the engine in the vehicle, but the transmission and flywheel or flexplate will always have to be removed. In some cases, the engine itself has to be removed for further disassembly. Once you’ve gone through all the work of removing the engine and transmission it can be a good idea to go ahead and rebuild them while the labor to pull them out has already been done. Also, if your rear main seal needs to be replaced, the chances are high that other components do as well.
But what if everything else in your vehicle is fine? If you are not experience any other problems with your vehicle that would necessitate an engine or transmission rebuild, it may be worth repairing your rear main seal rather than replacing it. In most cases, your rear main seal will start to leak simply due to use and age rather than actually being broken or irreversibly damaged. The simple rubbing of the crankshaft on the seal can stretch out the opening causing a leak. Also, a lack of use can cause the seal to dry out and start to shrink or get brittle over time also causing leaks.
Repair a shrunken, cracked, or hard rear main seal can be as easy as adding BlueDevil Rear Main Sealer to your engine oil. BlueDevil Rear Main Sealer does not have any petroleum distillates to damage the other seals and gaskets in your engine and it has no particulates to clog the small passages, or damage the internal components in your engine. BlueDevil Rear Main Sealer does have the ability to restore your rear main seal to its original size, shape and softness to allow it to continue to seal oil from leaking past your crankshaft. BlueDevil Rear Main Sealer is rear main seal repair in a bottle and is guaranteed to seal your rear main seal leak!
You can learn more about BlueDevil Rear Main Sealer by visiting BlueDevil’s website here: Rear Main Sealer
You can Purchase BlueDevil Rear Main Sealer from any of our partnering local auto parts stores like:
- 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
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