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Home >> Subaru >> 2024 >> Impreza Base >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Radiator >> Inspection

Engine Cooling System: Radiator: Inspection

  1. Check the engine coolant for leakage.
    CAUTION:
    • Stop the engine.
    • The engine coolant is pressurized when it is hot. Wait until engine coolant cools down before proceeding the work.
    • If the engine coolant is spilt over the engine, exhaust pipe or the under cover, completely wipe it off to avoid emission of smoke or causing a fire.
    1. Inspect the water tank pipe cap to check that valve opening pressure is 123 kPa (1.25 kg/cm2 , 18 psi) or more. Ref. to COOLING (H4DO)>WATER PIPE>INSPECTION>WATER TANK PIPE CAP .
    2. Remove the radiator cap.
    3. Fill the radiator with engine coolant, and then install the radiator cap tester to the filler neck of radiator.
      CAUTION: Be careful not to deform the filler neck of radiator when installing and removing the radiator cap tester.
      G16761671Courtesy of SUBARU OF AMERICA, INC.
    4. Apply a pressure of 123 kPa (1.25 kg/cm2 , 18 psi) to the radiator and check the following points:
      • Leakage from the flow path of the engine coolant or its vicinity
      • Leakage from the hose or its connections
      • Significant pressure drop
      CAUTION: Be careful of engine coolant from spurting out when removing the radiator cap tester
  2. Check that there is no deformation, cracks or other damages.
  3. Check that the hose has no cracks, damage or loose part.
  4. Check the radiator fins for clogging.
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