Rear Main Seal

Hey Guys,

I tried a search on this and didn't find what I was looking for. The main is leaking in the 460 we are about to swap into a mustang. My question is which seal do you recommend? It is mostly stock now. Will be doing ported heads, cam, intake, and carb in the near future. Advance has two that I was looking at. PN: 40032 & 2909. They are both felpro two piece. The 2909 says for high vaccum applications. Or should I look for a one piece. Thanks

All are two piece.

I like to offset the seal alittle when installing them I like to turn it about 1/4" so that the ends are in the block and main cap, instead of letting them touch even with the block and main cap.I have not had a main leak after my Dad told me about offsetting the seal don't know if that the way you do it or not.

The rear main seal has crush spec., if thats not right they will also leak.

69F100 wrote:I like to offset the seal alittle when installing them I like to turn it about 1/4" so that the ends are in the block and main cap, instead of letting them touch even with the block and main cap.I have not had a main leak after my Dad told me about offsetting the seal don't know if that the way you do it or not.

Yea, I do the same w/good resullts

[quote="res0rli9"]The rear main seal has crush spec., if thats not right the will also leak. [/quoe] Pay special attention to this

Thanks for the information.