Pressure Testing Radiator Cap
NOTE:
Pressure tester is used to test both radiator cap and complete cooling system. Test as follows, or follow tool manufacturer's instructions.
Visually inspect radiator cap. Dip cap in water and connect to tester. Pump tester to bring pressure to upper limit of cap specification. Pressure cap specifications are given in COOLANT SPECIFICATIONS. If cap fails to hold pressure within specified range, replace cap.
NOTE:
Attach cap to tester and apply correct pressure.