Radiator Cap: Testing and Inspection

RESERVOIR TANK CAP

Inspection






- Check valve seat (A) of reservoir tank cap.
(B): Metal plunger

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






- Pull negative-pressure valve to open it, and that it close completely when released.
- Check that there is no dirt or damage on the valve seat of reservoir tank cap negative-pressure valve.
- Check that there are no unusualness in the opening and closing conditions of negative-pressure valve.






- Check reservoir tank cap relief pressure.
: [1][2]Cooling System, "Periodical


Standard
Maintenance Specification".
- When connecting reservoir tank cap to the radiator cap tester (commercial service tool) (A) and the radiator cap tester adapter (commercial service tool) (B), apply engine coolant to the cap seal surface.
- Replace reservoir tank cap if there is an unusualness related to the above three.