Originally Posted by Twilight Error
I found the expensive surprise!
Burned exhaust valve: Upper left head.It isn't visibly eroded, but it isn't liquid-tight when I put some Kerosene in the passageway. The other three exhaust and all four intake valves are fine. /QUOTE]
How about maybe just a piece of carbon stuck under the one valve since the others are all good
Could be. I'm going to have a closer look at the seat and valve today, maybe I'll see something lodged in there.