Cooling System Contents; Cooling System Service Information; Cooling System Troubleshooting - Honda Motorcycle Service Manual

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I TEM
SERVICE INFORMATION
TROUBLESHOOTING
SYSTEM DESCRIPTIONS
COOLANT
5-1 SYSTEM TESTING
5-1 THERMOSTAT
5-2 WATER PUMP
5-6
SERVICE INFORMATION
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Wait until the engine is cool before slowly removing the radiator cap. Removing the cap while the engine is hot and the
coolant is under pressure may cause serious scalding.
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Radiator coolant is toxic. Keep
it
away from eyes, mouth, skin and clothes.
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If any coolant gets in your eyes, rinse them with water and consult a doctor immediately.
- If any coolant is swallowed, induce vomiting, gargle and consult a physician immediately.
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If any coolant gets on your skin or clothes, rinse thoroughly with plenty of water.
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KEEP OUT OF REACH OF CHILDREN
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Add coolant at the reserve tank. Do not remove the radiator cap except to refill or drain the system.
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All cooling system service can be made with the engine in the frame.
e Avoid spilling coolant on painted surfaces.
e
After servicing the system, check for leaks with a cooling system tester.
e Refer to section 25 for fan motor thermostatic switch and temperature sensor inspections.
TROUBLESHOOTING
Engine temperature too high
Faulty temperature gauge or gauge sensor (see section 25)
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Thermostat stuck closed
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Faulty radiator cap
Insufficient coolant
Passages blocked in radiator, hoses, or water jacket
Air in system
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Faulty cooling fan motor
Faulty fan motor switch (see section 25)
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Faulty water pump
Engine temperature too low
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Faulty temperature gauge or gauge sensor
Thermostat stuck open
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Faulty cooling fan motor switch (see section 25)
Coolant leaks
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Faulty pump mechanical seal
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Deteriorated O-rings
Faulty radiator cap
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Damaged or deteriorated gaskets
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Loose hose connection or clamp
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Damaged or deteriorated hoses
Date of Issue: Sep., 1988
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HONDA MOTOR CO., LTD