RADIATOR ON-VEHICLE INSPECTION


  1. INSPECT RADIATOR CAP SUB-ASSEMBLY

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    1. Measure the valve opening pressure.


      1. If there are water stains or foreign matter on rubber seals 1, 2 or 3, clean the parts 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 the radiator cap tester.

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        When using the cap tester, tilt it to more than 30 degrees upwards.

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

        Pumping speed
        1 pump per second

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

        Judgement criteria
        Item Specified Condition
        Standard value (for brand new cap)

        93 to 123 kPa (0.95 to 1.25 kgf*cm2, 13.5 to 17.8 psi)
        Minimum standard value (for used cap)

        78 kPa (0.8 kgf*cm2, 11.4 psi)

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