2000ws6transam

iTrader: (5)

rear main seal leaks so i replaced it (put in upside down) so after the new one was installed i still have the same problem. i replaced all the gaskets and im 95% sure its the same thing leaking again anyone have any hints or have similar problems? my friend that helped me with the tear down did pack the seal with grease i only have 1300 miles on the motor and it idles at 55-60 PSI for oil pressure

OUTLAWZ RACING

iTrader: (9)

If its an slp block I think you have to use a differnt seal. I bought one from auto zone and advance two totaly differnt seals just call brian to see.

bigman

iTrader: (1)

The rear main seal is one of those things that just keeps leaking.

JOHN LAWSON

iTrader: (3)

Did you use sealant on your fly wheel bolts?
Sometimes they will leak oil around them and look like a seal leaking.

bichin95redta

The Gen III rear main seal was supposed to have ended rear main seal leaks. The rear engine cover uses, I believe, a compression carrier type gasket, which is a one-time-use-only item, so I hope you replaced it with a new one. If you did, the only thing I can think of, is that, somehow, while installing the new rear main seal, it's seating surface got nicked or possibly bent/warped? Also, alignment between the rear cover, and the back of the oil pan is critical...if I remember correctly, the ideal alignment is dead-even with each other, but there is a .020" tolerance to play with. GM sells a specialty tool for aligning the rear engine cover/oil pan with each other. BTW, the oil pan gasket IS a compression carrier type gasket, and, as such, is also a one-time-use-only item...just like the torque-to-yield fasteners.

When I did my GEN III stroker build, I replaced EVERY gasket, whether it was a compression carrier type, or not. With the $$$ I put into the build, I wasn't about to cheap out on gaskets. I haven't leaked a drop of anything, from anywhere.

2000ws6transam

iTrader: (5)

thanks i did use all new gaskets but only installed it the best i could by eyeball as far as alignment goes, so maybe thats where i went wrong.

P Mack

iTrader: (6)

I've always heard to install the seal dry. I did and have no leaks. Did you use an installation tool to make sure it didn't fold up when you put it on? For alignment I had the oil pan in place to make sure it was centered when I tightened the rear cover bolts.

jerflash

i tried to use the tool that came with the seal when i did mine but it was to small so i took a role of masking tape and unraped enough tape until it was the right size...worked great hahaha

P Mack

iTrader: (6)

I did about the same thing https://ls1tech.com/forums/showthrea...highlight=seal