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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Radiator ASSY (FA20) >> On-Vehicle Inspection

On-Vehicle Inspection

  1. Radiator cap SUB-ASSY check
    WARNING: To avoid the risk of burn, do not remove the radiator cap SUB-ASSY when the engine and radiator are hot. The fluid and steam may blow out due to the pressure.
    1. Perform the visual check.
      1. When water scale or foreign matter is on the gaskets 1, 2 and 3, wash it with water.
        NOTE: Always perform the work by hands so as not to damage the gaskets 1, 2 and 3.
      2. Check the gaskets 1, 2 and 3 for deformation, cracks and expansion.
      3. Make sure that the gaskets 3 and 4 are not stuck.
        G12587120Courtesy of SUBARU OF AMERICA, INC.
    2. Perform the function check.
      1. Apply the engine coolant to the gaskets 2 and 3 before using the radiator cap tester.
        G12587121Courtesy of SUBARU OF AMERICA, INC.
      2. Pump the cap tester several times and check the maximum pressure.

        Pumping speed: Pump once a second

        CAUTION: When using the cap tester, perform the check by tilting it 30° or more.
        NOTE: There is a case that the radiator cap SUB-ASSY cannot keep the maximum pressure, but it is not abnormal.
        Standard value: 93 to 123 kPa {0.95 to 1.25 kgf/cm 2  , 14 to 18 psi} 
        Limit: 83 kPa {0.85 kgf/cm 2  , 12 psi} 
        NOTE:
        • The valve opening pressure of a new radiator cap SUB-ASSY is 93 to 123 kPa {0.95 to 1.25 kgf/cm2 , 14 to 18 psi}.
        • If the maximum valve opening pressure does not exceed the limit value, replace the radiator cap SUB-ASSY.
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