Radiator Cap: Testing and Inspection

RADIATOR CAP PRESSURE TEST





1. Use an adapter to attach the cap to the tester.
2. Increase the pressure until the gauge stops moving.
Main valve opening pressure: 81.4 - 108 kPa (0.83 - 1.1 kg/cm2, 11.8 - 15.6 psi)
Limit: 65 kPa (0.65 kg/cm2, 9.2 psi)
3. Check that the pressure level is maintained at or be low the limit.
4. Replace the radiator cap if the reading does not remain at or below the limit.

NOTE: Be sure that the cap is clean before testing, since rust or other foreign material on the cap seal will cause an incorrect indication.

INSPECTION
RADIATOR CAP





1. Check the radiator cap for damage, cracks and deterioration.





2. Attach a radiator cap tester to the radiator.
3. Pump the tester until the pointer stabilizes.
4. If the pointer stays constant for 10 sec. at a point exceeding the service limit, the radiator cap is good.