Testing The Pressure Cap

2004 Oldsmobile Bravada RWDSECTION Testing The Pressure Cap
WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

TOOLS REQUIRED:

  • J42401 Surge Tank Cap Tester

CAUTION: DO NOT REMOVE PRESSURE CAP FROM A HOT SYSTEM. ALLOW THE SYSTEM TO COOL, THEN SLOWLY REMOVE PRESSURE CAP.
  1. Remove the pressure cap from the coolant surge tank.
  2. Make sure that all parts of the pressure cap, tester, and adapter are clean.
  3. Wet the rubber gasket of the pressure cap with water and install Surge Tank Cap Tester J42401-1 to cap.
    Fig 1: Installing Surge Tank Cap Tester J42401-1 To Cap
    G01041176Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.