RADIATOR ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

Do not remove the reserve tank cap, air release valve or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

B004OZ7

PROCEDURE


  1. INSPECT RESERVE TANK CAP (for Engine)

    CAUTION:

    Do not remove the reserve tank cap, air release valve or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.


    1. B004QSGC04
      *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. B004QMBC06
        *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.

        Pump Speed
        1 pump per second

        Tech Tips

        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 reserve tank cap)

        		 94 to 122 kPa

        Standard pressure

        (for brand-new reserve tank cap)

        1.0 to 1.2 kgf/cm2

        Standard pressure

        (for brand-new reserve tank cap)

        		 13.5 to 17 psi

        Minimum pressure

        (for used reserve tank cap)

        		 79 kPa

        Minimum pressure

        (for used reserve tank cap)

        0.8 kgf/cm2

        Minimum pressure

        (for used reserve tank cap)

        		 11.4 psi

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

  2. INSPECT FINS FOR BLOCKAGE

    B004P6N

    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, keep the tip of the nozzle at right angles to the core surface.

      • If the nozzle of the steam cleaner is too close to the core, there is a possibility of damaging the fins. Always maintain the following distances from the core when using a steam cleaner.

        Standard Steam Cleaner Nozzle Distance
        Steam 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.