Radiator (For Hatchback) 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 rubber packings 1, 2 and 3 are not deformed, cracked or swollen.
   

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

4. Apply engine coolant to rubber packings 2 and 3 before using the radiator cap tester.
   

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





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 a defect.
   

   Judgment criteria:

   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)

   Text in Illustration

   *1	Radiator Cap Tester
   *2	Water Filler Cap Sub-Assembly
   *a	30° or more

   If the maximum pressure is less than the specified pressure for the minimum standard valve, replace the water filler cap sub-assembly.
   

If the fins are clogged, wash them with water or a steam cleaner and dry them with compressed air.

NOTICE:

1. To avoid damaging the fins, the injection direction should be at right angles to the core surface.
   
2. If the steam cleaner is too close to the core, there is a possibility of damaging the fins, so keep to the following injection distances.
   

   Injection Pressure kPa (kgf/cm2, psi)	Injection Distance mm (in.)
   2.942 to 4.903 (30 to 50, 427 to 711)	300 (11.811)
   4.903 to 7.845 (50 to 80, 711 to 1.138)	500 (19.685)

3. If the fins are bent, straighten them with a screwdriver or pliers.
   
4. Do not expose electronic components to water.