RADIATOR ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:


  • When coolant (Toyota genuine FC stack coolant) is hot, do not remove the radiator cap sub-assembly.

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

A01MGHY

PROCEDURE


  1. INSPECT RADIATOR CAP SUB-ASSEMBLY


    1. A01MJR7C03
      *a Rubber packing (1)
      *b Rubber packing (2)
      *c Rubber packing (3)
      *d Valve seat

      Visually check the water filler cap sub-assembly.


      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.

        Note

        Perform the work by hand.

      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.

    2. Measure the valve opening pressure.


      1. Apply a new coolant (Toyota genuine FC stack coolant) to the rubber packings (2) and (3) before using the radiator cap tester.

      2. Install the radiator cap sub-assembly to the radiator cap tester.

      3. A01MHOGC03
        *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
        Judgment Criteria
        Item Specified Condition
        Standard value (for brand-new radiator cap sub-assembly)

        74 to 103 kPa (0.8 to 1.1 kgf/cm2, 11 to 15 psi)

        Minimum standard value (after using radiator cap sub-assembly)

        74 kPa (0.8 kgf/cm2, 11 psi)

        Note

        Using the radiator cap tester, tilt it to more than 30 degrees.

        Tech Tips

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

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