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 ...

The purpose of your engine is to compress fuel and air and then ignite it, creating heat energy that then makes mechanical motion. If your engine can't compress the air and fuel properly, the engine ...

Want to know how healthy or unhealthy your engine really is? Get yourself a compression tester and find out. Despite how complex many modern vehicles are, you can do many common repair and maintenance ...

What Is A Pre-Purchase Inspection For Used Cars? A Pre-Purchase Inspection(PPI) is a detailed vehicle inspection by a certified mechanic or auto specialist to assess the vehicle's mechanical, ...