My '83 AC Vanagon is leaking oil, presumably from the rear main seal
from what I can see.  The leak is most prominent after prolonged
operation, but it eventually stops when the engine cools.  The engine
was rebuilt about 5 years ago (rear main replaced), but has only about
30K on the rebuild.  Regardless of the leak, it runs great.  My
questions are:

1) Could a slight overfill of the crankcase oil have caused this?

2) Is there any reasonable way to remedy the problem without yanking the
engine and replacing the seal?  RTV?

Thanks

Jesse Falsone
Annapolis, MD