Hello all:

WOW! I am really impressed by the amount of information that I have read re. cp fits.

I think that my cp are round and not tapered, my cylinders are tapered, my pistons and cylinders are clean, smooth and free from any form of rust. Perhaps these parts were made to fit only one combination of cp and cylinder.

These engines, mostly ST G20/.15D were modified with custom heads that look like what Davis now uses for his head design. I would like to get these engines running again but the tight fitting cp will not permit this. There is no wally that I can get the cp to enter the cylinder from the top! I guess that I could heat the cylinder and cool the cp to insert the cp but what would happen at room temperature? Perhaps I would then have a shrink fit. That would be fun!!!!!!!!!!!!

Thanks for the suggestions.

Stay well my friends,

Franchi