Radiator Cap: Service and Repair

INSPECTION










Hold the cap in your hand, top side up. The vent valve (6) at the bottom of the cap should not open. If the valve opens, replace the cap. If the rubber seal (5) has swollen, preventing the valve from opening, replace the cap.

Hold the cleaned cap in your hand, upside down. If any light can be seen between vent valve (6) and the rubber seal (5), replace the cap.

A replacement cap must be of the type designed for a full pressure coolant systems. This design ensures coolant return to the radiator.