Radiator Cap: Testing and Inspection

RADIATOR

Checking Radiator Cap






- Check valve seat of radiator cap.
- Check if valve seat is swollen to the extent that the edge of the plunger cannot be seen when watching it vertically from the top.
- Check if valve seat has no soil and damage.





- Pull negative-pressure valve to open it, and make sure that it is completely closed when released.
- Make sure that there is no dirt or damage on the valve seat of radiator cap negative-pressure valve.
- Make sure that the valve operates properly in the opening and closing conditions.





- Check radiator cap relief pressure using suitable tool and Tool.
Tool number: EG-17650301 (J-33984-A)
Standard: 78 - 98 kPa (0.8 - 1.0 kg/cm2, 11 - 14 psi)
Limit: 59 kPa (0.6 kg/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 abnormality in the negative pressure valve, or if the open-valve pressure is outside of the standard values.
- Replace radiator cap if it is not within specifications.

CAUTION:
When installing radiator cap, thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.