RADIATOR ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:


  • B002C6E

    When engine assembly and radiator assembly is hot, do not remove the reserve tank cap.

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

PROCEDURE


  1. INSPECT RESERVE TANK CAP


    1. A01QC8PC03
      *a O-ring
      *b Rubber Packing

      Measure the valve opening pressure.


      1. If there are water stains or foreign matter on the O-ring, clean it with water and finger scouring.

      2. Check that the O-ring is not deformed, cracked or swollen.

      3. Apply engine coolant to the O-ring and rubber packing before using a radiator cap tester.

      4. A01QAB3C05
        *1 Reserve Tank Cap
        *a Radiator Cap Tester
        *b 30° or more

        When using the radiator cap tester, tilt it upwards 30° or more.

      5. Pump the radiator cap tester several times, and check the maximum pressure.*1

        Pump Speed
        1 pump per second

        Tech Tips

        *1: Even if the reserve tank cap cannot maintain the maximum pressure, it is not a defect.

        Result
        Item Specified Condition

        Standard pressure

        (for brand-new cap)

        93 to 123 kPa (0.9 to 1.3 kgf/cm2, 13.5 to 18.0 psi)

        Minimum pressure

        (for used cap)

        79 kPa (0.8 kgf/cm2, 11.5 psi)

        If the maximum pressure is less than the specified pressure for the minimum pressure, replace the reserve tank cap.

  2. INSPECT FINS FOR BLOCKAGE


    1. If the fins are clogged, wash them with water or a steam cleaner and dry them with compressed air.

      Note


      • To avoid damaging the fins, the injection direction should be at right angles to the core surface.

      • If the steam cleaner is too close to the core, there is a possibility of damaging the fins, so maintain the following injection distances.

        Standard Injection Distance
        Injection Pressure Specified Condition

        2942 to 4903 kPa (30.0 to 50.0 kgf/cm2, 427 to 711 psi)

        		 300 mm (11.8 in.)

        4903 to 7845 kPa (50.0 to 80.0 kgf/cm2, 711 to 1138 psi)

        		 500 mm (19.7 in.)

      • If the fins are bent, straighten them with a screwdriver or pliers.

      • Do not expose electronic components to water.

    2. Dry the fins with compressed air.