Suzuki VX800 1990-1993 Service Manual 05 Cooling system

COOLING SYSTEM

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5- 1

COOLING SOLuTjON RADIATOR AND WATER HOSES

THERMOSTAT

WATER PUMP

THERMO-S WITCH

!_NS!=EC?!G_N AND D!SA SSE_MBL Y FAN MOTOR

TEMPERATURE SWITCH

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5-l COOLING SYSTEM

COOLING SYSTEM

DESCRIPTION

The engine is cooled by coolant set in forced recirculation through jackets formed in the cylinder and head, and through the radiator. For the water pump, a high-capacity centrifugal pump is used. The radiator is a tube-and-fin type made of aluminum material, which is characterized by lightness in weight and good head dissipation.

The thermostat is of wax pellet type, complete with a valve as the means of temperature-dependent control over the flow of coolant through the radiator. The valve is actuated by the temperature-sensitive wax contained in the pellet.

Referring to the following illustration, the thermostat is in the closed condition, so that water recirculates through the route comprising pump, engine, by-pass holes of the thermostat and radiator in the regulated condition.

the coolant temperature rises to 75°C and the thermostat valve unseats, the normal coolant flow is established. At about 90°C of coolant temperature, the thermostat becomes completely open and most of heat is released to the atmosphere through the radiator core.

Reservoir tank

I -

Thermostat

COOLING SOLUTION

At the time of manufacture, the cooling system is filled with a 50 : 50 solution of distilled water and anti-freeze/summer coolant. This 50 : 50 mixture will provide excellent heat protection, and will protect the cooling system from freezing at temperatures above -31°C (-24” F).

If the motorcycle is to be exposed to temperatures below

-31°C (-24”F), this mixing ratio should be increased up to 55% or 60% according to the Fig. 2.

NOTE:

The characteristics of different anti-freezes vary. Read the

label to know the protection you will have.

CAUTION: Do not put in more than 60% anti-freeze or less than 50%. Do

not mix different brands of anti-freeze.

COOLING SYSTEM 5-2

Water 850 ml (1.811.5 US/imp. pt)

50%

Coolant 850 ml (1.8/l .5 US/Imp. pt)

(“F) 1°C)

302,150

284.140

'E .- 266.130

E F 248.120

2 230.110

212 i 100

10 20 30 40 50 60

Density (%)

Fig. 1 Coolant density-boiling

point curve.

(kg/cd)

IoF)

(“c)

32 1 0 14 -10

-4 i -20

‘6

-22. -30

.- : -40+ -40

I; -58. -50

Fig. 2

20 40 60 80 loo

Density (%)

Coolant density-freezing

point curve.

5-3 COOLING SYSTEM

RADIATOR AND WATER HOSES

Radiator Radiator cap Radiator hose Radiator inlet hose Coolant reservoir Radiator overflow hose Thermo-switch Temperature switch Cooling fan Fan motor

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