RADIATOR ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

A01REH2

PROCEDURE


  1. CHECK RADIATOR CAP SUB-ASSEMBLY

    CAUTION:

    Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.


    1. A01R8S7C03
      *a Rubber Packing (1)
      *b Rubber Packing (2)
      *c Rubber Packing (3)
      *d Valve Seat

      Measure the valve opening pressure.


      1. If there are water stains or foreign matter on the rubber packings (1), (2) or (3), clean the part(s) with water and finger scouring.

      2. Check that the rubber packings (1), (2) and (3) are not deformed, cracked or swollen.

      3. Check that the rubber packing (3) and valve seat are not stuck together.

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

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

      6. A01RFTNC11
        *1 Radiator Cap Sub-assembly
        *a Radiator Cap Tester
        *b 30° or more

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

        Pumping Speed
        1 pump per second

        Tech Tips

        Even if the radiator cap sub-assembly cannot maintain the maximum pressure, it is not a defect.

        Result
        Item Specified Condition

        Standard pressure

        (for brand-new radiator cap sub-assembly)

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

        Minimum pressure

        (for used radiator cap sub-assembly)

        79 kPa (0.8 kgf/cm2, 11.5 psi)

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

  2. INSPECT FINS FOR BLOCKAGE

    A01R9BR

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

      Note


      • To avoid damaging the fins, keep the tip of 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.