What does a compression gauge assess within an engine?

A compression gauge is a tool specifically used to measure the pressure within the combustion chamber of an engine. This measurement is crucial because it allows a technician to evaluate the engine's health and performance. High compression values indicate that the engine components, such as the rings and cylinder walls, are sealing well, which allows for proper combustion. Conversely, low compression values may signal problems such as worn piston rings, damaged cylinder walls, or leaking valves, all of which can lead to reduced engine efficiency and power output.

Understanding the pressure within the combustion chamber is essential for diagnosing issues within the engine. It provides insight into how well the engine is capable of generating power and can help guide further investigation and repairs. This diagnostic tool plays a key role in the overall assessment of engine performance and functionality.