CHANGES IN PISTON DESIGN Last month we discussed changes in piston ring design. Changes in rings also mean changes in the pistons they ride on. A century ago you could find cast iron pistons in your motor. Aluminum soon proved to be a lighter weight and more durable...

Piston Ring Gapping Tip Some of you may know this ring end gapping tip, but I have never seen it anywhere. Not even in ring package instructions. This has to do with checking the flimsy oil rail gaps. Most conventional size bores are not much of a problem. The rails...