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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 449 (Engine Cooling System) >> Diagnostic Information and Procedures >> Pressure Cap Testing >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue, 2001 Oldsmobile Intrigue, and 2000 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. 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.
    Fig 1: Testing Pressure Cap Using J 24460-01 And J 42401
    G01757973Courtesy of GENERAL MOTORS CORP.
  3. Use J 24460-01  and J 42401  in order to test the pressure cap for the following conditions:
    • Pressure release when J 24460-01  exceeds the pressure rating of the pressure cap.
    • Maintain the rated pressure for at least 10 seconds.

    Note the rate of pressure loss.

  4. Replace the pressure cap if either of the following conditions is true:
    • The pressure cap does not release pressure which exceeds the rated pressure of the cap.
    • The pressure cap does not hold the rated pressure.
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