Do you have oil spots in your driveway, or a leaky engine block when you look under your vehicle? Sorry, super bad news: you might have a rear main seal leak. In fact, few words from the mechanic will stop every driver in their tracks quicker than “You have a rear main seal leak!”

A rear main seal leak is among the worst things that can happen to any vehicle because the rear main seal is very hard to reach and it requires much of your engine to be disassembled. On most modern engines, the seal’s failure is due to a condition inside the engine or a component connected to the back of the engine, and is most common in older cars.

For many drivers, news of such a problem means that it could be time to purchase a new vehicle, because rear main seal repair typically costs more than the value of vehicles old enough to develop such leaks.

Replacing a rear main seal is absolutely one of the most dreaded, most labor-intensive and expensive jobs you can do on your car next to replacing the head gaskets or rebuilding your transmission.

In addition, there are no shortcuts or quick fixes if the seal has expired. A replacement isn’t something you’re going to want to take on yourself and even a seasoned mechanic can struggle with it as it’s in a painfully difficult position.

What's the best approach to this problem?

I've changed the seal severally but still no solution.

Should I try blue devil rear main sealer?