On-Vehicle Inspection

3UZ-FE COOLING: RADIATOR: ON-VEHICLE INSPECTION

1. CHECK RADIATOR CAP SUB-ASSEMBLY

CAUTION:
Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.





(a) Visually check the radiator cap.

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

(2) Check that rubber packing 1, 2 and 3 are not deformed, cracked or swollen.

(3) Check that rubber packing 3 and 4 are not stuck together.

(b) Measure the valve opening pressure.

(1) Apply engine coolant to rubber packing 2 and 3 before using a radiator cap tester.





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

(3) 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.

Standard Judgment Criterion:





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