Cooling System Troubleshooting - Honda VTR1000F Service Manual

COOLING SYSTEM
TROUBLESHOOTING
Engine temperature too high
• Faulty temperature gauge or thermosensor
• Thermostat stuck closed
• Faulty radiator cap
• Insufficient coolant
• Passages blocked in radiator, hoses or water jacket
• Air in system
• Faulty cooling fan
• Faulty fan motor switch
• Faulty water pump
Engine temperature too low
• Faulty temperature gauge or thermosensor
• Thermostat stuck open
• Faulty fan motor switch
Coolant leaks
• Faulty water pump mechanical seal
• Deteriorated O-rings
• Faulty radiator cap
• Damaged or deteriorated cylinder head gasket
• Loose hose connection or clamp
• Damaged or deteriorated hoses
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