What causes the rear main seal to fail?
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. Solving why the seal failed in the first place is critical to preventing a labor-intensive comeback.
When to replace the rear main seal on a car?
The most labor-intensive seal to replace on any engine is the rear main seal. There are no shortcuts or quick fixes if the seal has expired. 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.
What can I use to stop a rear main seal leak?
Whereas the Rear Main Sealer is less concentrated and specifically formulated exclusively for leaking rear main seals. If you are not 100% sure where the vehicle is leaking or there seem to be multiple leaks then we recommend using BlueDevil Oil Stop Leak.
Where does the oil come from in the rear main seal?
On most engines, oil leaks can occur above and below the rear main seal. It could be a leaking oil pressure sensor, oil pan gasket or galley plug near the seal that causes oil to come from the bell housing. Adding dye to the oil can help reveal where the oil is actually coming from. Check the transmission and oil pan
Can a rear main seal leak cause a problem?
A rear main seal leak can cause some big problems in your vehicle. To make things worse, replacing a rear main seal can be one of the most expensive jobs you can do on your car next to replacing the head gaskets or rebuilding your transmission.
How to replace a rear main seal without removing the?
Driveshafts are used differently for different kinds of vehicles. But in order to replace the rear main seal, you have to remove the driveshaft. You will then get into the flexplate which is the last layer between you and the rear seal. The flexplate looks like a circular metal disc with holes into it.
Why is the rear main seal so important?
The rear main seal is the rear seal for the crankshaft 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.
How does bluedevil rear main seal fix leaks?
Rather than simply clogging up leaks, BlueDevil Rear Main Sealer is designed to revive and rejuvenate the rear main seal in your motor so it can do the job it was originally intended to do. BlueDevil Rear Main Sealer is a versatile rear main seal fix for seals that are dried, cracked, or shrunken due to age or use.
Can a crack in the crankshaft seal cause a leak?
If the seal tears or cracks at all your crankshaft rotation can cause the seal to get torn up very quickly causing a very fast leak. A fast leak can lower your engine oil level to dangerous levels very quickly and dangerously low oil levels can lead to permanent engine damage.
When to know if you have a rear main seal leak?
Once you’ve determined you’ve got a dripping leak, you’ll want to start from the bottom and work your way up. If you see oil dripping on the back of your oil pan or on the front of your transmission bell housing it’s possible you have a rear main seal leak.
Where is the rear crankshaft seal located on a car?
The rear seal is located along the transmission. The process to replace a rear crankshaft seal is complicated so it is best left to a professional mechanic. Since the crankshaft seal can go bad over time, it is a good idea for you to know the symptoms before it completely fails.
Can a 2 piece seal be replaced without pulling the crank?
Yes you can replace a 2 piece rear main seal on a SBC without pulling the crank, by just removing the pan and the rear cap. I did it on my 283 a few years ago, and it has never leaked a drop since. I don’t believe in offsetting the seal ends though.
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. Solving why the seal failed in the first place is critical to preventing a labor-intensive comeback.
Can a crankshaft seal go bad over time?
Since the crankshaft seal can go bad over time, it is a good idea for you to know the symptoms before it completely fails. The seal is an important part to keeping your crankshaft running smooth, and your crankshaft is necessary for your engine to run properly. Therefore, this repair should not be delayed.
The most labor-intensive seal to replace on any engine is the rear main seal. There are no shortcuts or quick fixes if the seal has expired. 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.