4. Cooling System
Overhauling Info………………………………. 4-1
Trouble Shooting……………………………… 4-2
Check and Maintenance………………………4-3
Reservoir Tank……………………. …………..4-5
Adding Coolant…………………………………..4-7
Cooling System Chart…………………………..4-10
Overhaul Information
Note
● If the radiator cap is opened when the coolant temperature is above 100℃, the pressure of coolant
will drop and get boiled rapidly. The steam jet may cause danger and injury. Cover the cap with a
piece of rag after the coolant temperature goes down and open the cap slowly.
● Inspection of coolant should be done after the coolant is fully cooled.
● Coolant is toxic. Do not drink or splash it to skin, eyes or cloth.
—If coolant splashes in your eyes, thoroughly wash your eyes with water and consult a doctor.
—If coolant splashes on your clothes, quickly wash it away with water and then with soap and water.
—If coolant is swallowed, induce vomit immediately and see a physician.
—Store the coolant properly and keep it away from reach of children.
● Check radiator fins for mud block and/or damage. Correct the bent fins. Clean off the mud with water
and compressed air. Replace with a new one if the damaged fin area reached 20%.
● The overhauling of the water pump can be done without removing the engine.
● Add coolant through reservoir tank. Do not open the radiator cap except when disassembling the cooling
system for adding or drainage of coolant.
● Do not stain the plastic parts with coolant. In case of any coolant stains, flush with water immediately.
● After disassembly of the cooling system, check the joints for leakage with a radiator cap tester (available in
the market).
● Refer to Chapter 10 for overhauling of temperature transducer.
Inspection standard
Item Standard
Full capacity 1140ml
Reservoir tank capacity 340ml
Coolant
Capacity
Standard density 30%
Opening pressure of radiator cap 108kpa(1.1kgf/cm
2
)
Valve open temperature
72±2℃
Full open Temperature
88℃
Thermostat
Full open lift 3.5-4.5mm
Tightening torque
Drainage bolt, water pump: 8N·m(0.8kgf·m)
Thermoswitch 10N·m(1.0kgf·m)
4-1
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