SQUARE RINGS IN A ROUND HOLE We have a quick trick to use while checking ring gaps on odd engines that you may not have a ring squaring tool for, and/ or the pistons are not of a flat top design. Set your digital-dial calipers for the depth you want to check the...

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...