Cooling System Leak Testing

^ 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 radiator filler cap.





2. Install J 24460-01 to the radiator.
3. Apply normal system operating pressure.

NOTICE: Do not use pressure greater than 138 kPa (20 psi) to test the radiator. Damage to the radiator will result if a higher pressure is used.

4. The needle on the tester gauge should remain steady for several minutes, otherwise there is a leak.





5. Examine all cooling system connections and components, including the radiator and the heater, for leaking coolant.
6. Tighten the hose connections or repair as required.
7. If the radiator leaks during the pressure test, mark the leak area.