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Home >> Subaru >> 2008 >> Forester XT, Automatic >> Repair and Diagnosis >> Engine Mechanical >> Cooling Fan >> Engine Cooling System >> Radiator Cap >> Inspection

Radiator Cap: Inspection

  1. Attach the radiator cap to tester.
    Fig 1: Attaching Radiator Cap To Tester
    G04997857Courtesy of SUBARU OF AMERICA, INC.
  2. Increase pressure until the tester gauge pointer stops. Radiator cap is functioning properly if it holds the service limit pressure for 5 - 6 seconds.

    Non-turbo model radiator side and turbo model coolant filler tank side 

    Specified pressure: 93 - 123 kPa (0.95 - 1.25 kgf/cm 2  , 14 - 18 psi) 

    Service limit pressure: 83 kPa (0.85 kgf/cm 2  , 12 psi) 

    Radiator side on turbo models 

    Specified pressure: 122 - 152 kPa (1.24 - 1.55 kgf/cm 2  , 18 - 22 psi) 

    Service limit pressure: 112 kPa (1.14 kgf/cm 2  , 16 psi) 

    CAUTION:
    • Be sure to remove foreign matter and rust from the cap in advance. Otherwise, results of pressure test will be incorrect.
    • Do not confuse the cap of coolant filler tank and cap of radiator.