RADIATOR ON-VEHICLE INSPECTION


  1. INSPECT RADIATOR CAP SUB-ASSEMBLY

    A01CH91E01

    1. Measure the valve opening pressure.


      1. If there are water stains or foreign matter on rubber seals 1, 2 or 3, clean the parts with water and finger scouring.

      2. Check that rubber seals 1, 2 and 3 are not deformed, cracked or swollen.

      3. Check that rubber seals 2 and 3 are not stuck together.

      4. Apply engine coolant to rubber seals 2 and 3 before using the radiator cap tester.

      5. A01CGZUE09
        Text in Illustration
        *1 Radiator Cap
        *2 Radiator Cap Tester
        *a More than 30°

        When using the cap tester, tilt it more than 30°.

      6. Pump the cap tester several times, and then check the maximum pressure*.

        Pumping speed
        1 pump per second

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

        Judgment Criterion
        Item Specified Condition
        Standard value (for brand new cap)

        93 to 123 kPa (1.0 to 1.3 kgf/cm2, 13.5 to 18 psi)
        Minimum standard value (for used cap)

        78 kPa (0.8 kgf/cm2, 11.4 psi)

        If the maximum pressure is less than the minimum standard value, replace the radiator cap sub-assembly.

  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.