Pressure Testing the Pressure Cap

- Tools Required
- J24460-01 Cooling System Tester
- J24460-92 Cooling System Tester Adapter

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 J24460-92.
4. Install the cap with J24460-92 attached to J24460-0 1.
5. Apply pressure to the pressure cap by operating the plunger handle of J24460-01.
6. Note the rate of decrease in pressure.
7. If the cap fails to hold 103 kPa (15 psi), install a new pressure cap.