Ok now I am thinking this might be a prime opportunity for a leak down test otherwise I will be cracking the case, undoing the rod bolts and sliding out the piston so inspect the oil ring. The leak down would verify valve leakage, head gasket issues or potential ring issues the compression test did not reveal.
I've always thought of buying my own leak down tester but never actually bought one. I'd appreciate some more experienced thoughts.
If I crack the case it is likely I am most likely going to damage crank seals and the case gasket. A set is around $30. If this was a Honda, Briggs Industrial Engine, Briggs Intek or a Kohler engine etc I wouldn't hesitate spending the extra money but on a Chonda I need to draw the line at a certain point.
Anyhow thoughts would be welcome.
