GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 24460-01 Cooling System Tester
    • J 24460-92 Cooling System Tester Adapter

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. Object Number: 569434  Size: SH
  3. Wet the pressure cap gasket with water. Wash off any sediment from the sealing surface.
  4. Install the cap to the J 24460-01 and J 24460-92 .
  5. Apply pressure to the pressure cap by operating the plunger handle of J 24460-01 .
  6. Note the rate of decrease in pressure.
  7. If the cap fails to hold the pressure stamped on the cap, replace the pressure cap.