Tip for installing Pistons with rings, especially modern very thin rings. There is a barbell shaped Teflon tool available to install Pistons. It is filled with lead shot to deaden its blows. The tool is used to push or hammer Pistons thru a ring compressor into its cylinder. I have found that just repeatedly dropping the tool on the piston from about 3-5" rather than pushing or hammering with it will allow the rings to transition from the ring compressor into the cylinder without breaking or damaging the ring. This tap, tap method allows you to concentrate on keeping the ring compressor in full contact with the block until all of the rings are in the cylinder. I have taught a number of students this method and found it to be almost fool proof. Note, there is always a bigger fool somewhere. The secret again is to just let the weight and impact of the tool to do the work, your hand should not touch the tool until after it has landed on the piston, then just pick it up and drop it again. This method is especially useful when there is very little v shape at the top of the bore and the compression ring is 0.5 mm thick.