A compression test reveals the condition of your engine's valves, its valve seats, and piston rings and whether these parts are wearing evenly. Healthy engines should have compression over 100 psi per ...

With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...

We may receive a commission on purchases made from links. While browsing auto repair and maintenance tools at your local parts store, you've likely come across compression testers like the Orion Motor ...

Cylinders are the heart of any internal combustion engine. The cylinders are where air and fuel are compressed and ignited, creating combustion which is what creates power. One of the most important ...

The traditional "60/80" rule for piston engine compression is an outdated myth; specific manufacturer guidance (e.g., TCM Service Bulletin SB03-3) dictates airworthiness for Continental engines and ...