Originally Posted by Cab_Burge
Their are only four places oil can leak at the rear of the motor, above the main seal, oil galley plugs and cam plug, oil pan gaskets, the main seal itself or the main side seals shruggy
I use adhesive silicone to seal the side seals after the main seal holder is installed, I also use a very thin strip of that adhesive on top of both main seals so they seal against the seal holder and sometimes a tiny dab on the seal ends where they touch. I use a putty knife or a wide tip thin screw driver to smear the silicone into the gaps on the seal holder to the block, it is not easy but I do it so you can to wrench scope
i build lots of Mopar B, RB and 426 hemi that don't leak oil from the rear work shruggy
I hope this helps up


The leak is definitely at the seal area. I checked all plugs and everything above the seal area and it's bone dry up there. I've tried every combination of rubber seals, viton seals, different brands, one piece, two piece, I've used the side seals on the retainer, left them out and used rtv using the same method that you used, clocked the seal at different locations and no matter what, it leaks everytime. That's why I was asking about a vacuum pump or even going to try a pcv setup because I have tried everything possible that I can think of with no luck. Even after pulling the engine back out and sending it back to the engine builder, waited over a year to get it back, put the whole car back together, just to have it leak probably half a quart of oil in about 30 seconds of running. I'm just want to drive my car at this point. It's been sitting in the garage for two years like this.

1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi