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12. COOLING SYSTEM
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· The water pump must be serviced after removing the engine. Other cooling system service can
be done with the engine installed in the frame.
· The engine must be cool before servicing the cooling system.
When the coolant temperature is over 100 , never remove the radiator cap to release the
pressure because the boiling coolant may cause danger.
· Avoid spilling coolant on painted surfaces because the coolant will corrode the painted surfaces.
Wash off any spilled coolant with fresh water as soon as possible.
· After servicing the system, check for leaks with a cooling system tester.
TORQUE VALUES
Water pump impeller 1.0~1.4 kgf-m (11.8 N-m)
Water pump cover bolt 1.0~1.4 kgf-m (11.8 N-m)
TROUBLESHOOTING
Engine temperature too high Coolant leaks
· Faulty temperature gauge or thermosensor · Faulty pump mechanical (water) seal
· Faulty radiator cap · Deteriorated O-rings
· Faulty thermostat · Damaged or deteriorated water hoses
· Insufficient coolant
· Passages blocked in hoses or water jacket
· Clogged radiator fins
· Passages blocked in radiator
· Faulty water pump
Temperature gauge shows the wrong temperature
· Faulty temperature gauge or thermosensor
· Faulty thermostat
SPECIFICATIONS
Radiator cap relief pressure 0.90.15 kg/cm
Begins to open 71
Thermostat temperature Full-open 80
Valve lift 3.5 4.5 mm
Radiator & Engine: 950 cc
Coolant capacity Total 1250 cc
Reserve tank: 300 cc
12-2