COOLING SYSTEM
6 - 11
Radiator Inspection
◆ Check the radiator core.
◆ If there are obstructions to air flow, remove the
radiator and remove obstructions.
◆ If the corrugated fins【A】are deformed, carefully
straighten them.
◆ If the air passages of the radiator core are blocked
more than 20% by unremovable obstructions or
irreparably deformed fi ns, replace the radiator with a
new one.
Radiator Cleaning
◆ Refer to the Cooling System in the Periodic
Maintenance chapter.
Radiator Cap Inspection
◆ Check the condition of the top and bottom valve
seals of the radiator cap.
If any one of them shows visible damage, replace the
cap.
【
A
】
Bottom Valve Seal
【B】Top Valve Seal
【C】Valve Spring
◆
Install the cap
【
A
】
on a cooling system pressure
tester 【B】.
!
Wet the cap sealing surfaces with water or coolant to
prevent pressure leakage.
◆ Watching the pressure gauge, slowly pump the
pressure tester to build up the pressure. The relief
valve opens,indicated by the gauge hand flicks
downward.
◆ The relief valve must open within the relief pressure
range in the table below and the gauge hand must
remain within the specifi ed range at least 6 second.
Radiator Cap Relief Pressure
Standard: 93 ～ 123 kPa（0.95 ～ 1.25 kgf /cm
2
，
14 ～ 18psi）
If the cap cannot hold the specifi ed pressure, or if it holds
too much pressure, replace it with a new one.
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