Radiator Cap: Service and Repair

RADIATOR

RADIATOR CAP : Inspection






- Check valve seat (A) of radiator cap.





- Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.
- Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the metal retainer.





- Pull 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 radiator cap negative-pressure valve.
- Make sure that the valve operates properly while opening and closing.





- Check radiator cap relief pressure using a suitable tool (A) and
Tool (B).
Standard and Limit: Refer to "Standard and Limit" [1][2]Cooling System.

Tool number (B): EG17650301 (J-33984-A)
- When connecting the radiator cap to the Tool (B), apply water or coolant to the cap seal surface.
- Replace radiator cap if there is an abnormality in the negative pressure valve, or if the radiator cap does not perform within specifications.

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