Cooling System Leak Testing (On-Vehicle)

^ Tools Required
- J 24460-01 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, only after the system has cooled.
2. Connect the J 24460-01 to the radiator.
3. Apply normal system operating pressure. Never exceed 138 kPa (20 psi). The needle on the tester gauge should remain steady for several minutes, otherwise there is a leak.





4. Examine all cooling system connections and components, including the radiator and the heater, for leaking coolant.
5. Tighten the hose connections or repair as required.





6. Inspect the radiator cap with the J 24460-01 in order to ensure the correct pressure maintenance. Refer to Pressure Cap Description.
7. If the radiator leaks during the pressure test, mark the leak area.