RADIATOR ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK RADIATOR CAP SUB-ASSEMBLY

    A005GZL

    1. Measure the valve opening pressure.


      1. If there are water stains or foreign matter on rubber seal 1, 2 or 3, clean the part(s) 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 3 and 4 are not stuck together.

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

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

      6. A005GW9E15
        Text in Illustration
        *1 Radiator Cap Tester
        *2 Radiator Cap Sub-Assembly
        *a 30°or more

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

        Pumping speed
        1 pump every second

        Tech Tips

        *1: Even if the cap cannot maintain the maximum pressure, it is not defective.

        Judgment Criterion
        Item Specified Condition

        Standard value

        (for brand-new cap)

        93.3 to 122.7 kPa (0.95 to 1.25 kgf/cm2, 13.5 to 17.8 psi)

        Minimum standard value

        (for used cap)

        78.5 kPa (0.80 kgf/cm2, 11.38 psi)

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

  2. INSPECT FINS FOR BLOCKAGE

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    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 radiator core surface.

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

        Standard Injection Distance
        Injection Pressure Specified Condition

        2942 to 4903 kPa

        (30 to 50 kgf/cm2, 427 to 711 psi)

        		 300 mm (11.81 in.)

        4903 to 7845 kPa

        (50 to 80 kgf/cm2, 711 to 1138 psi)

        		 500 mm (19.69 in.)

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

      • Do not expose electronic components to water.