Two piece rear main seal??

[jetsbaby]

I know that you convert the 351W two piece rear main seal to a one piece through a machining process..My question is, what do you do on the 460 stroker engines that you sell that cannot be converted to a one piece..What master engine builder secret if there is any to make the 460 from having a rear main seal leak..I heard of rear main seal crush as not to be more than 020 to .030 total crush..Any more and a leak will develop.. Also I heard that line honing the block and there is even a bigger chance of developing a leak..

[jetsbaby]

Any help here Keith??

[Keithc8]

The 460 has a similiar problem in that the flange of the crank is to big for a one piece rear main seal. we have even thought about having 460 and FE cranks made with the same rear on them as the small block Ford and then use that rear main seal. This would mean new flywheel bolt pattern as well as flexplates. I lot of trouble to fix the two piece seal short coming. We have not had near as much problem with the 460 rear seal but what we do is put a little silicone on the back side of the seal, turn it where it is up a little on one side and down on the other where it does not line up at the parting lines. We also use a little silicone between the cap and block where they meet. This has worked pretty well for us in most cases. If the block is line honed it will tighten up the area where the rear main seal goes. Hope some of this helps but these are probably what you are already doing.

Thanks, Keith

[coosawjack]

This saved me with my 408W Stroker......cheap insurance!!

http://www.microsleeve.com/csrs.html

No leaks in 8 years!!

[Keithc8]

You can do this with the small block but they have nothing for the 460 or the FE because the way the back of the crank is, the flange where the flywheel goes will not let one of these slide over the crank.

Thanks, Keith

[coosawjack]

Oh well...I tried!!

Thanks for clearing that up for us Keith!!