If you don't feel good about it, change them!
and don't do it again!
Two main considerations for "your stuff only":
Is the seal supposed to have rotation in a certain direction?
Is the actual sealing lip in about the right place, on a polished
surface, and no oil passages are blocked?
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I do everything by the book if it is for a customer,
since I won't chance anything going wrong for them.
Next time, get yourself straight before you touch your car.
-Bob