KYMCO Downtown 300i ABS, Service Manual

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12. COOLING SYSTEM
12-2
Downtown 300i ABS
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 0.9
±
0.15 kg/cm
²
Begins to open 71
℃
Thermostat temperature Full-open 80
℃
Valve lift 3.5
～
4.5 mm
Coolant capacity Total 1719 cc
Radiator: 766 cc
Reserve tank: 590 cc
Hose: 363 cc