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Component Tests: Cap

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the radiator cap or pressure relief cap and seals for damage or deterioration. Install a new radiator cap or pressure relief cap, if necessary.
  2. Fit the radiator cap or pressure relief cap to the Radiator/Heater Core Pressure Tester Kit using the aftermarket adapter.
    3. NOTE: If the plunger of the pressure tester is depressed too fast, an incorrect pressure reading will result.
  3. Slowly pump the pressure tester until the pressure gauge stops increasing and note the highest pressure reading. Release the pressure and repeat the test. Install a new radiator cap or pressure relief cap if the pressure is not 124 kPa (18 psi).
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