Radiator Cap: Testing and Inspection
RADIATOR CAP INSPECTION1. Inspect the radiator cap or coolant recovery reservoir cap and seals for damage or deterioration. Replace the radiator cap if necessary.
2. Attach the radiator cap to a radiator cap tester (commercially available).
3. Slowly pump the pressure tester until the pressure gauge stops increasing and note the highest pressure reading. Release pressure and repeat the test. Replace the radiator cap if the pressure is not 99.3 - 121.4 kPa (14.4 - 17.6 psi).
Note:
^ If the plunger of the pressure tester is depressed too fast, an incorrect pressure reading will result.