What Is The Normal Compression For A Gasoline Engine?

What Is The Normal Compression For A Gasoline Engine? 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 cylinder, with no more than 10 percent variation between the highest and lowest readings.Apr … Continue reading What Is The Normal Compression For A Gasoline Engine?