Radiator Cap: Inspection

2014 Subaru Impreza Sport LimitedSECTION Inspection
  1. Check that the radiator cap does not have deformation, cracks or damage.
  2. Attach the radiator cap tester to radiator cap.
    Fig 1: Checking Radiator Cap Does Not Have Deformation, Cracks Or Damage
    G08315780Courtesy of SUBARU OF AMERICA, INC.
  3. Increase pressure until the radiator cap tester gauge needle stops. Radiator cap is functioning properly if it holds the service limit pressure for 5 - 6 seconds. Replace the radiator cap if its valve opens at less than the service limit.
    CAUTION: Be sure to remove foreign matter and rust from the cap in advance. Otherwise, results of pressure test will be incorrect.

    Standard: 

    93 - 123 kPa (0.95 - 1.25 kg/cm 2  , 14 - 18 psi) 

    Service limit: 

    83 kPa (0.85 kg/cm 2  , 12 psi) 

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.