Component Tests and General Diagnostics

Cooling System Leak Testing

Special Tools

* EN 471 - Adapter

* EN 6327 A - Cooling System Test Adapter

For equivalent regional Tools, refer to Special Tools Tools and Equipment.

Warning

Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the engine is hot (pressure is high), will cause the solution to boil instantaneously, with explosive force. The solution will spew out over the engine, fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at any time. Flammable antifreeze could cause a serious fire.

Warning

In order 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 surge tank cap.

2. Check the coolant level.

Fill the coolant level to the COLD mark if necessary.

3. Pull the coolant expansion tank from the bracket in the direction of the battery.

Note:
Follow manufacturer instructions.

4. Attach the coolant system tester with EN 471 - adapter and EN 6327 A - adapter to the coolant expansion tank.

5. Apply approximately 100 kPa (15 psi) to the cooling system.

6. Check the cooling system for leaks.

7. Remove the cooling system tester.

* Release the pressure

* Remove the cooling system tester with EN 471 - adapter

8. Install the surge tank cap.