COOLING SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT FOR COOLANT LEAK

    CAUTION:


    • A001W13

      When engine assembly and radiator assembly is hot, do not remove the radiator cap sub-assembly and air release valve.

    • Fluid and steam may spray out due to high pressure, possibly resulting in burns.


    1. Remove the reserve tank cap.

    2. A001UHHC01
      *a Radiator Cap Tester

      Fill the radiator assembly with engine coolant, and then install a radiator cap tester.

    3. Warm up the engine.

    4. Pump the radiator cap tester to 122 kPa (1.2 kgf/cm2, 17 psi), and then check that the pressure does not drop.


      • If the pressure drops, check the hoses, radiator assembly and engine water pump assembly for leaks.

      • If there are no signs of external engine coolant leaks, check the heater core, cylinder block and cylinder head.

    5. Remove the radiator cap tester.

    6. Install the reserve tank cap.

  2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR TANK


    1. A001ULQC01
      *a Full Line
      *b Low Line

      Check that the engine coolant level is between the low line and full line when the engine is cold.

      If the engine coolant level is low, check for leaks and add engine coolant to the full line.

      Note

      Do not substitute plain water for engine coolant.

  3. INSPECT ENGINE COOLANT QUALITY

    CAUTION:


    • A001W13

      When engine assembly and radiator assembly is hot, do not remove the radiator cap sub-assembly and air release valve.

    • Fluid and steam may spray out due to high pressure, possibly resulting in burns.


    1. Remove the reserve tank cap.

    2. Check if there are any excessive deposits of rust or scale around the reserve tank cap and water filler hole. Also, the engine coolant should be free of oil.

      If excessively dirty, replace the engine coolant.

    3. Install the reserve tank cap.