Cooling System; Description; Cooling Circuit - Suzuki AN400 Service Manual

6-2 COOLING AND LUBRICATION SYSTEM

COOLING SYSTEM

DESCRIPTION

The engine is cooled by the forced circulation of engine coolant, using a high-capacity, centrifugal water
pump, through water jackets formed in the cylinder and cylinder head, and through the radiator. The
tube-and-fin type radiator is made of aluminum, which is characterized by lightness in weight and good heat
dissipation.
A wax-pellet type thermostat is used to regulate the flow of engine coolant through the radiator. As the cool-
ant temperature rises to about 82 °C (180 °F) the thermostat valve unseats and a normal coolant flow is
established. At about 95 °C (203 °F) the thermostat becomes completely open and, as a result, heat is
released to the atmosphere through the radiator core.

COOLING CIRCUIT

RESERVOIR
TANK
BREATHER
BY-PASS
THERMOSTAT
RADIATOR
COOLANT COOLING
TEMPERATURE FAN THERMO
SENSOR SWITCH
RH CYLINDER
CYLINDER
CRANKCASE HEAD
WATER PUMP