Bob asked:- > << There is no reason for the piston to touch the cylinder wall >>
> OK Mike, I realize that it need not, but how come there are countless books > written with chapters on the process of good running fits on pistons? Probably because they weren't written by me. I believe a close fit is necessary if you're using cast iron piston rings or cotton packing, but I have no experience of these. The method I use is commonly used by proponents of O rings, however. It works! Mike
