Sentra L4-1.8L (QG18DE) SULEV (2003)
Radiator Cap: Testing and Inspection
CHECKING RADIATOR CAP
1. Pull the negative-pressure valve to open it and check that it closes 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 unusualness in the opening and closing conditions of the negative-pressure valve.
2. Check radiator cap relief pressure.
Standard:.............78 - 98 kPa (0.8 -1.0 kg/cm2, 11 -14 psi)
Limit:..................59 kPa (0.6 kgf-cm2, 9 psi)
When connecting the radiator cap to the tester, apply water or coolant to the cap seal surface.
Replace the radiator cap if there is an unusualness in the negative-pressure valve, or if the open-valve pressure is outside of the limit.