Radiator Cap: Testing and Inspection

CHECKING RADIATOR CAP
1. Pull the negative pressure valve to open it and check that it close completely when released.
Check that there is no dirt or damage on the valve seat of the radiator cap negative-pressure valve.
Check that there are no abnormalities in the opening and closing conditions of the negative-pressure valve.






2. Check radiator cap relief pressure.

Standard: 98 kPa (1.0 kg/cm2, 14 psi)
Limit: 59 - 98 kPa (0.6 - 1.0 kg/cm2, 9 - 14 psi)

When connecting the radiator cap to the tester, apply water or LLC to the cap seal part.
Replace the radiator cap if there is an abnormality in the negative-pressure valve, or if the open-valve pressure is outside of the standard values.