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Radiator Cap: Inspection

  1. Check the radiator cap for damage, cracks or weakening.
    Fig 1: Inspecting Radiator Cap
    G00325658Courtesy of KIA MOTORS AMERICA, INC.
  2. Connect the tester to the radiator cap.
  3. Increase the pressure until the indicator of the gauge stops moving.
  4. Replace the radiator cap if the reading does not hold steady for about 10 seconds.
Fig 2: Testing Radiator Cap
G00325659Courtesy of KIA MOTORS AMERICA, INC.