Compresion Issues, Long Post

[niterydr]

I would bet it is head related. Valve seal, carbon deposits, etc.
Like single said, check to see if there is oil in the ports when you pull the exhaust mani.
Shane is right, good luck doing a "wet" compression test on a dished piston.

[Jakey]

Originally Posted by niterydr

Valve seal

It has always been my understanding that valve stem seal issues do not surface in a compession test, only in a leakdown test?

[niterydr]

Originally Posted by Jakey

It has always been my understanding that valve stem seal issues do not surface in a compession test, only in a leakdown test?

Valve seal for burning oil/creating carbon possible that could be hangin up a valve.
It doesn't actually have anything to do in regards to a low compression cylinder, but it could effect the combustion chamber if it is poluting the system with oil.
I would be its more of valve SEATS or a cracked piston.