Join Date: Aug 1998
Location: Waldorf Md. USA
Re: One piece rear main seal, sbc
The Fel Pro seal is as good as you will find. You do have to be careful when you tighten the bolts that hold the seal retainer to the block, as the retainer tends to move and can get off center. I always tighten them very lightly and a little on each bolt at a time while watching the retainer to make sure it does not move. I have never seen the second round gasket in your picture, I wonder if it is for the LS1 series engines ? What was the part number on the gasket box ?
You mentioned that the seal was leaking under a load ???? Does it leak just sitting there idleing ? If not, I wonder if you have a problem with crankcase pressure that is forcing the oil past the seal ? What type of breather setup is on the engine ?
Advanced Automotive Machine
1971 Heavy Chevy - original owner
1984 Buick Riviera - original owner (Wife's car)
Team Chevelle #100