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 the radiator cap tester.
   





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

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

   Pumping speed:

   1 pump per second
   

   HINT:

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

   Judgment criterion:

   Item	Specified Condition
   Standard valve (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 valve (for used cap)	78.5 kPa (0.8 kgf*cm2, 11.4 psi)

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