Generally
This is the perfect tool for trouble-free piston assembly.
A turned cone to mount the pistons in the cylinder bore with. It is adjustable to all cylinder diameters between 4″ to 4.060″ It will be exactly the right diameter when you have adjusted it and then has the same diameter as the cylinder on one side, it tapers and becomes larger on the other side. Holding the taper against the cylinder bore push the piston straight down, the piston rings are pressed together and the piston slides into place without a problem. This is a tool that you will be happy to use and also you can use it for all engines with cylinder diameter STD 4″ .020″ .030″ .040″ .060″