Radiator On-Vehicle Inspection

Measure the valve opening pressure.

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

2. Check that 1, 2 or 3 is not deformed, cracked or swollen.
   

3. Check that 3 and 4 are not stuck together.
   

4. Apply engine coolant to 2 and 3 before using a radiator cap tester.
   

   HINT:

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





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

   Pumping speed:

   1 pump per second
   

   HINT:

   ^*: 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 cap sub-assembly.