Cobalt L4-2.4L (2007)
Radiator Cap: Testing and Inspection
Pressure Cap Testing
Tools Required
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J 24460-01 Cooling System Pressure Tester
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J 42401 Radiator Cap/Surge Tank Test Adapter
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J 46143 Intercooler Reservoir Cap Test Adapter
Caution: 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 pressure cap.
2. Wash the pressure cap sealing surface with water.
3. Use J 24460-01 (1) with one of the following attachments (2):
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J 42401 in order to test the radiator cap
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J 46143 in order to test the intercooler reservoir cap
4. Test the pressure cap for the following conditions:
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Pressure the release when J 24460-01 exceeds the pressure rating of the pressure cap.
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Maintain the rated pressure for at least 10 seconds.
Note the rate of pressure loss.
5. Replace the pressure cap under the following conditions:
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The pressure cap does not release the pressure which exceeds the rated pressure of the cap.
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The pressure cap does not hold the rated pressure.
