Devices utilized to assess the internal integrity of an engine by measuring its capacity to maintain pressure within various systems, such as cylinders or cooling passages, represent a critical aspect of diagnostics. For example, a compression tester evaluates cylinder sealing efficiency, while a cooling system pressure tester identifies leaks within the radiator and hoses.
The application of these instruments is essential for identifying potential engine malfunctions before they result in significant damage or failure. Early detection of leaks or compression issues through pressure analysis can prevent costly repairs and extend the operational lifespan of an engine. Historically, these methods provided mechanics with valuable insights into engine condition long before sophisticated electronic diagnostics became commonplace.