Radiator: Testing and Inspection

ON-VEHICLE INSPECTION
1. CHECK RADIATOR CAP SUB-ASSEMBLY
(a) Measure the valve opening pressure.





(1) If there are water stains or foreign matter on rubber packing 1, 2 or 3, clean it by using water and finger scouring.
(2) Check that rubber packing 1, 2 or 3 is not deformed, cracked or swollen.
(3) Check that rubber packing 3 and 4 are not stuck together.
(4) Apply engine coolant to rubber packing 2 and 3 before using a radiator cap tester.





(5) When using the cap tester, tilt it more than 30°.
(6) 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:

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