Cooling System Service Information; Cooling System Troubleshooting; Engine Temperature Too High; Engine Temperature Too Low - Honda CTX700N/ND Service Manual

COOLING SYSTEM
SERVICE INFORMATION
GENERAL
Removing the radiator cap while the engine is hot can allow the coolant to spray out , seriously scalding you .
Always let the engine and radiator cool down before removing the radiator cap .
NOTICE
Using coolant with silicate inhibitors may cause premature wear of water pump seals or blockage of radiator
passages
.
Using tap
water may cause
engine damage
.
•
Add coolant at the reserve
tank . Do not remove the radiator cap except to refill or drain the system
.
•
All cooling system services can be done with the engine installed in the frame .
•
Avoid spilling coolant on painted surfaces
.
•
After servicing the system
, check
for leaks with a cooling system tester
.
• Refer to
the ECT sensor inspection ( page 22
-
13 )
.
TROUBLESHOOTING
Engine temperature too high
• Faulty high coolant
temperature indicator or ECT sensor
•
Thermostat stuck closed
• Faulty radiator cap
• Insufficient coolant
•
Passage
blocked in radiator , hoses or water jacket
•
Air in system
•
Faulty cooling fan motor
• Faulty fan
control relay
• Faulty water pump
Engine temperature too low
•
Faulty high coolant
temperature indicator or ECT sensor
• Thermostat stuck open
• Faulty fan control relay
Coolant leak
• 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 hose
• Damaged
radiator
8
-
3