Cooling System Leak Testing (Radiator Cap Leak Test)

Radiator Cap Pressure Test

^ Tools Required
- J 24460-01 Cooling System and Cap Pressure 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. After the system has cooled, remove the radiator cap.





2. Wet the radiator cap gasket with water. Wash off any sediment from the sealing surface.
3. Install the cap to J 24460-01.
4. Use the plunger handle of the J 24460-01 in order to obtain the pressure specified on the cap.
5. Note the rate of decrease in pressure.
6. The pressure reading should remain within the corresponding pressure segment of the scale for at least 10 seconds.
7. If the cap does not hold the corresponding pressure, replace the cap.