Cam lift and timing can put the valves dangerously close to the piston. We show you how to check the clearance.

Learn how to check your valve and piston clearance with a degree wheel for a more accurate measurement from Circle Track Racing Magazine.

The piston rings on any engine have three main purposes - to ensure the combustion chamber’s tightness, to clean the cylinder and to leave a very thin layer of oil on its surface in order to ...

Each ring has gap, which serves two purposes - it enables you to take them out or put them back in their niches on the piston, as well as allowing you to measure how much worn they are.