Any engine, whether gasoline or diesel, requires compression to operate. The process of compression confines and presses a mixture of air and fuel into a small volume within the area of the engine’s cylinder. This process presses together all the molecules under very high pressure. Since the gasoline engine has a spark plug, only moderate compression is enough, requiring about 140-160 pounds per square inch (PSI).
A Compression test is a good way to measure the condition of the rings, cylinders, and valves. If your engine is running rough or is lacking power consider doing a compression test. It is important […]