GM Service Manual Online
For 1990-2009 cars only

Radiator Filler Cap Pressure Testing Procedure

Tools Required

    • J 24460-01 Cooling System Tester
    • J 24460-92 Surge Tank Test Adapter
  1. Clean the cap.

  2. Object Number: 179280  Size: SH
  3. UseJ 24460-01 and J 24460-92 in order to test the cap.
  4. Slowly pump J 24460-01 in order to obtain the minimum holding pressure. If the cap fails to hold 103 kPa (15 psi) of pressure, replace the cap.