Suzuki drz 400 2003 Service Manual

5-2 COOLING 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
coolant temperature rises to about
75 °C (16]oF) the thermostat valve unseats and a normal coolant flow is
established. At about 90°C (194° F) the thermostat becomes completely open and, as a result, heat is re-
leased to the atmosphere through the radiator core.
Referring
to the following illustration, the thermostat is in the closed condition, so that engi ne coolant re c ir-
culates through the route comprising the water pump, engine, by-pass hole of the thermostat and radiator in
the regu lated condition.
CD Impeller
® Radi ato r cap
@ RighI radiator
C!) L eft radiator
® Th e rm os tat
4
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Suzuki drz 400 2003 Specifications

General

Brand	Suzuki
Model	drz 400 2003
Category	Motorcycle
Language	English