Radiator: Testing and Inspection

1NR-FE COOLING: RADIATOR: ON-VEHICLE INSPECTION

1. CHECK WATER FILLER CAP SUB-ASSEMBLY





(a) Measure the valve opening pressure.

(1) If there are water stains or foreign matter on rubber seal 1, 2 or 3, clean the part(s) 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 a radiator cap tester.

(5) When using the cap tester, tilt it upwards 30° or more.





Text in Illustration





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

Pumping speed:

1 pump every second

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

Judgment Criterion:





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

2. INSPECT FINS FOR BLOCKAGE





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

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

Standard Injection Distance:





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