Honda V65 Magna-VF1100C 1983 Shop Manual page 89

6. COOLING SYSTEM
SERVICE INFORMATION
TROUBLESHOOTING
SYSTEM TESTING
COOLANT REPLACEMENT
SERVICE INFORMATION
GENERAL
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6- 1
6-2
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THERMOSTAT
RADIATOR/COOLING FAN
WATER PUMP
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6-6
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Do not remove the radiator cap when the engine is hot. The coolant is under pressure and severe scalding could result.
The engine must be cool before servicing the cooling system.
• Use only distilled water and ethylene glycol in the cooling system. A 50-50 mixture is recommended for maximum corro-
sion protection. Do not use alcohol-based antifreeze.
• Add coolant at the reserve tank. Do not remove the radiator cap except to refill or drain the system.
• All cooling system service can be made with the engine in the frame.
• Avoid spilling coolant on painted surfaces.
• After servicing the system, check for leaks with a cooling system tester.
• Refer to Section 21 for fan motor thermostatic switch and temperature sensor inspections.
SPECIFICATIONS
Radiator cap relief pressure
0.75-1.05 kg/cm
2
(10.7-14.9 psi)
55% Distilled water+ 45% ethylene glycol: -32°C (-25°F)
Freezing point
50% Distilled water+ 50% ethylene glycol: -37°C (-34°F)
45% Distilled water+ 55% ethylene glycol: -44.5°C (-48°F)
Coolant capacity:
Radiator and engine
3.0 liters (3.2 US qt)
Reserve tank
0.45 liters (0.5 US qt)
Total system
'83, '84, '85:
3.45 liters (3.65 US qt)
After '85:
3 .2 liters (3.38 US qt)
Thermostat
Begins to open: 80° to 84°C (176° to 183° F)
Valve lift: Minimum of 8 mm at 95°C (0.315 in. at 203°F)
Boiling point (with 50-50 mixture):
Unpressurized: 107.7°C (226°F)
Cap on, pressurized: 125.6°C (258°F)
TOOLS
Special
Cooling system tester
Commercially available in U.S.A.
TROUBLESHOOTING
Engine temperature too high
Engine temperature too low
1. Faulty temperature gauge or gauge sensor
1. Faulty temperature gauge or gauge sensor
2. Thermostat stuck closed
2 . Thermostat stuck open
3. Faulty radiator cap
4. Insufficient coolant
Coolant leaks
5. Passages blocked in radiator, hoses, or water jacket
1. Faulty pump mechanical seal
6. Fan blades bent
2. Deteriorated 0-rings
7. Faulty fan motor
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