Component Tests and General Diagnostics

^ Tools Required
- J 24460-01 Cooling System Tester, or equivalent


WARNING: To help avoid being burned, do not remove the radiator cap while the engine and the radiator are hot. Scalding fluid and steam can be blown out under pressure if the cap is removed too soon.





1. Remove the radiator filler cap, only after the system has cooled.
2. Connect the to the radiator.
3. Apply normal system operating pressure. Never exceed 138 kPa (20 psi).
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. Check the radiator cap with the cooling system tester, in order to ensure the correct pressure maintenance.
8. If the radiator leaks during the pressure test, mark the leak area.