Radiator Cap: Testing and Inspection

Pressure Cap Testing

Tools Required

* J 24460-01 EN-48501 Pressure Cap Adapter
* J 24460-01 J-48501 Radiator Cap Pressure Adapter
* J 24460-01 J-24460-01 Cooling System and Cap Pressure Tester

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.

Warning: Refer to Radiator Cap Removal Warning (Service Precautions).

Warning: Refer to Safety Glasses Warning (Safety Glasses Warning).





1. Inspect and clean the sealing O-rings (1) with water and a wet cloth.




2. Attach the coolant filler cap (1) to a commercially available cooling system pressure tester (2), using the pressure cap adapter (4) and the pressure tester adapter (3).

Note: Should the coolant pressure cap fail to reach or hold the specified pressure, replace the cap.

3. Slowly pressurize cap to 120 - 150 kPa (17 - 22 psi).





Note: The V6 coolant filler neck is shown in the illustration above, for the V8 variant the coolant filler neck is located on the radiator assembly.

4. Prior to installing the coolant pressure cap ensure that the coolant filler neck cap seating surface (1) is clean and free from obstruction.
5. Install the coolant pressure cap.