Pressure Testing the Pressure Cap

- Tools Required
- J24460-01 Cooling System Tester

Caution: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.

1. Remove the pressure cap.





2. Wet the pressure cap gasket with water. Wash off any sediment from the sealing surface.
3. Install the cap to the J24460-01.
4. Apply pressure to the pressure cap by operating the plunger handle of J24460-01.
5. Note the rate of decrease in pressure.
6. If the cap fails to hold the pressure stamped on the cap, replace the pressure cap.