Measuring piston-to-valve clearance is an important step to ensure the durability of your engine build.

At the closest piston approach point to the valve, clearance can change more than 13 percent with a big cam and/or a hard-core engine originally built to tight clearances.

Another factor that effects piston-to-cylinder wall clearance is the actual piston design. Depending on the location of the aluminum within the piston, it will expand differently in each area.

Check out this tech article called Piston Head Clearance Guide, brought to you by the experts at Chevy High Performance Magazine.

Measurements of piston friction force under operating conditions were made by applying the Floating Liner Method to a single–cylinder test gasoline engine. The measurement revealed how the piston ...

The piston rings have three major roles - to seal the combustion chamber, clean the cylinder wall and create a very thin layer of oil on it in order to minimize friction. Each ring has gap, which ...