340 rear main seal leak/gush

Ironmike said

Well Turk, It's a seal not a bearing. I've put together 11 engines since 2009. Mine and some friends. Always used a Superfomance "pink" rear seal and always clocked them 3/8 offset.
Not one has ever leaked a drop. Way back then, Rick @ Superformance told me that's the way ya do it. So I considered his advice gospel. I was brand new to Mopar.

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It’s not a bearing but it has crush LIKE a bearing.

If you fit the seal correctly you don’t offset it.

That came from a 1995 Felpro sealing seminar I had to go to.

If you are offsetting a two piece seal you need to find out why it’s leaking if you don’t. And it’s not that the seal is leaking at the split.

It’s because the seal is too proud and it gets over crushed and the seal deforms.

Offsetting the seal doesn’t fix that, but it’s a hack that half assed works.

The correct installation is fitting the seal.

I love Superformance gaskets but he’s wrong on that.