Hi-Gauge Compression Tester

The Gunson Hi-gauge is a tool for measuring and recording the pressure created by the piston in each cylinder. This information is then used to diagnose faults in valves, pistons, piston rings, cylinder bores or head gaskets. Such tests are also an excellent guide to the general condition of the engine and can be used during routine engine servicing to give advance warning of developing problems or for fault diagnosis.