Radiator Pressure Tester Kit Find cooling system external leaks and detect internal leaks caused by a blown head gasket, or a cracked block or head For testing automotive pressurized cooling systems up to 30 PSI Includes 8 radiator cap adapters for servicing most domestic and import vehicles Large volume pump capacity reduces strokes required to pressurize cooling systems Connects using self-locking quick-disconnect components for time saving assembly and breakdown