I'm assembling a wd45 engine and when it came to the rear seal it seemed to extend out in each half much more excessively than what seems reasonable. This 2 piece seal came from a Reliance gasket kit. I realize they are supposed to stick out a bit and your not supposed to cut them back, but this one was over a 1/4" per side, so they need to crush down a total of a 1/2" or more. The seals were very difficult to install in their slots, but I'm fairly confident they are in the full depth.
So I decided to bolt on the main bearing cap and torque it to the correct specs, it did crush down the seal and cap was tight on the shims, but the seal tightened up so much on the crank than I can hardly get it to turn, I'm not sure if the starter will even turn it over.
I did pre assemble the crank and main bearings before installing the seal to verify the fit and all was good.
When taking the main cap with the seal back off again I noticed the crushed felt seal pushed apart the narrow ears on the 'F' seals and it pushed up the aluminum seal retainer a little further from the oil pan/block parting line.
My question is, is this normal? I've installed rear main seals in D17's before and don't remember them having to crush down so much.
Do different seal manufacturers make theses seals with different crush amounts?
Thanks for your help
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