A cylinder leak tester for gasoline engines can diagnose faults such as a crack in the cylinder head, worn piston rings and valves, and burnt seals. Indicates cylinder leakage extent and engine pressure. Clear scales of the manometers facilitate reading the measurement result. The indicator is made of damage-resistant yet lightweight materials. In addition, the indicators are covered with a rubber shock-absorbing cover. The parts are equipped with quick couplers for easy and quick installation. Mainly used in automotive workshops.