CAUTION / NOTICE / HINT
Do not remove the radiator cap sub-assembly, cylinder block drain cock plugs or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
INSPECT RADIATOR CAP SUB-ASSEMBLY
Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
Measure the valve opening pressure.
If there are water stains or foreign matter on rubber packing 1, 2 or 3, clean it by using water and finger scouring.
Check that rubber packing 1, 2 and 3 are not deformed, cracked or swollen.
Check that rubber packing 3 and 4 are not stuck together.
Apply engine coolant to rubber packing 2 and 3.
|*1||Radiator Cap Sub-assembly|
|*2||Radiator Cap Tester|
|*a||30° or more|
When using the radiator cap tester, tilt it 30° or more.
Pump the radiator cap tester several times and check the maximum pressure.*1
|1 pump per second|
*1: Even if the cap cannot maintain the maximum pressure, it is not necessarily defective.
|Standard Judgment Criterion|
If the maximum pressure is less than the minimum standard value, replace the radiator cap sub-assembly.
INSPECT FINS FOR BLOCKAGE
If the fins are clogged, wash them with water or a steam cleaner and dry them with compressed air.
To avoid damaging the fins, the injection direction should be at right angles to the core surface.
If the steam cleaner is too close to the 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.
Dry the fins with compressed air.