Compression Tester
A tool used to measure the compression pressure inside each engine cylinder.
A compression tester determines an engine's mechanical health by measuring cylinder pressure during cranking. Low readings may indicate worn piston rings, leaking valves, or head gasket failure. Testing each cylinder helps locate the issue precisely. Consistent pressure across all cylinders indicates a balanced engine. Compression tests are vital before major repairs or performance tuning. Using an adapter hose ensures proper sealing and accurate measurement. Results are compared with manufacturer specifications to assess engine wear.
Related Diagnostic Guide
This topic is part of CHEPQ’s system-level diagnostic framework.
For a broader understanding of how this component is analyzed in real-world diagnostics, refer to the following guide:
Applying This Knowledge in Practice
The diagnostic principles discussed above are commonly applied in real-world vehicle diagnostics. To put this knowledge into practice, explore professional automotive diagnostic tools designed to support system testing, fault analysis, and troubleshooting across modern vehicles.