Radiator Cap: Testing and Inspection

Pressure Cap Testing

^ Tools Required
- SA914 1E Cooling System Pressure Tester
- J 42401 Radiator Cap/Surge Tank Test Adapter

Pressure Cap Testing

Caution: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is on 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 pressure cap.





2. Wash the pressure cap sealing surface with water.
3. Use the SA914 1E (1) with J 42401 (2) in order to test the pressure cap.
4. Test the pressure cap for the following conditions:
^ Pressure release when the SA914 1E exceeds the pressure rating of the pressure cap.
^ Maintain the rated pressure for at least 10 seconds. Note the rate of pressure loss.
5. Replace the pressure cap under the following conditions:
^ The pressure cap does not release pressure which exceeds the rated pressure of the cap.
^ The pressure cap does not hold the rated pressure.