At least by having to strip the engine I found that it has the forged pistons and not the cast ones. I filled the combustion chamber with WD40 and tiltted it so that it all pooled over the inlet valve, left it for a while and when I came back none of it had leaked by the valve seat. Looking at the very shiney inlet valve it looks as if it may be a new one, I wonder what I will find when I drop the engine out and remove the vertical cylinder. But before I get to that stage I want to run the engine to check the horizontal cylinder has stopped spewing oil and is running a lot quieter. |