oil blow out IO-360

No, remember on a compression check your valves are closed, thus why I
suggested the valve wobble test. Not saying the guide is cracked, but it or
they could be worn. I was just trying to keep the symptom (excess oil out
the breather) separated from the cause (unknown) and relate what I had
discovered.

Let us know what you find.
Jim

"Robert M. Gary" wrote in message
oups.com...

Jim Burns wrote:
It seems like I'm agreeing with Jim these days, I'd also say that
something
is creating excessive case pressure. Along those lines I just tore down
a
horizontally opposed Kohler that was blowing oil from the breather
faster
than I could dump it in. It had blown a cylinder barrel seal, not a
gasket,
just an RTV seal. The key is that something caused the seal to blow.
What
did I find? Cracked exhaust valve guide that allowed exhaust pressures
into
the case.

Would that show up in a compression test though? I"m getting 79's all
around in the compression test. The IA seemed impressed with the
compression. Also, my EGTs seem to be running about the same.

-Robert