I got my engine pulled today and have given it a good going over, and the
typical leaks are there-pushrod seals, rocker cover and flywheel. What I
didn't expect to find was apparent oil seepage from around one of the large
upper crankcase nuts (main engine bearing?) and quite a bit around the base
of the jugs, especially at the sides. I suppose the jug seals could be shot,
but I just bought this rig and the guy had just had the heads rebuilt and he
replaced the rings himself (I have the receipts). Is there something special
about how the bases of the cylinders have to be sealed? Do the large nuts
need to be sealed as well? My manual doesn't say anything about this.

Nathaniel