GSIC - Global Service Information Center

# RADIATOR > ON-VEHICLE INSPECTION

## for Preparation Click here

1. CHECK RADIATOR RESERVOIR CAP SUB-ASSEMBLY

1. Measure the valve opening pressure.

   1. If there are water stains or foreign matter on O-ring 1, clean it with water and finger scouring.

   2. Check that O-ring 1 is not deformed, cracked or swollen.

   3. Apply engine coolant to O-ring 1 and rubber packing 2 before using the radiator cap tester.

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

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

      Pump speed:
        1 pump per second
      *: Even if the cap cannot maintain the maximum pressure, it is not a defect.

      Judgment criterion:

        Item | Specified Condition
        Standard value (for brand-new cap) | 93.3 to 122.7 kPa (0.95 to 1.25 kgf*cm2, 13.5 to 17.8 psi)
        Minimum standard value (after using cap) | 78.5 kPa (0.8 kgf*cm2, 11.4 psi)

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