RADIATOR ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Tech Tips


  • Use the same procedure for RHD and LHD vehicles.

  • The procedure listed below is for LHD vehicles.

CAUTION:

Do not remove the reserve tank cap or 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.

B006FNR

PROCEDURE


  1. CHECK RESERVE TANK CAP

    CAUTION:

    Do not remove the reserve tank cap or 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. Measure the valve opening pressure.


      1. B006C3HC11
        *a O-Ring
        *b Rubber Packing

        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. B006EFRC17
        *1 Reserve Tank Cap
        *a Radiator Cap Tester
        *b 30° or more

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

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

        Pumping 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)

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

        Minimum pressure

        (for used reserve tank cap)

        79 kPa (0.8 kgf/cm2, 11.5 psi)

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