LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 2004 >> Ion Red Line >> Repair and Diagnosis >> External Pages >> Different car >> Section 331 (Engine Cooling System) >> Diagnostic Information and Procedures >> Pressure Cap Testing >> Test Procedure

Test Procedure

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
    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. Fig 1: Pressure Testing Radiator Cap
    GM850101Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Lubricate J-42401 and pressure cap o-rings with coolant and press cap to seat o-ring on J-42401 before turning to engage threads.
  3. Use J 24460-01  (1) with J 42401  (2) in order to test the radiator cap. See Special Tools .
  4. Test the pressure cap for the following conditions:
    • Pressure the release when J 24460-01  exceeds the pressure rating of the pressure cap. See Special Tools .
    • 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 the pressure which exceeds the rated pressure of the cap.
    • The pressure cap does not hold the rated pressure.
scientia non olet · About LEMON Manuals