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ENGINE 1.3L QUADRAJET (90PS)
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B. COMPONENTS:
ENGINECOOLANTRESERVOIR
In addition to supplying the circuit, the coolant reservoir
absorbs the variations in the volume of the coolant as
the temperature of the engine varies.
A special calibrated valve in the pressurised cap
assures the following:
Q
escape of air from the circuit collected by the pipe
coming from the thermostat.
Q
air intake when the circuit contains a vacuum (due
to engine cooling).
ENGINE COOLING RADIATOR
It consists of a radiant mass and two side tanks for
the intake and outlet of coolant.
The radiator pipes and fins are aluminum, the tanks
are plastic.
WATER PUMP
This is a centrifugal vane pump with an aluminum
alloy casing and phenolic resin impeller. It is secured
to the engine crankcase and driven directly by the
services belt.
THERMOSTAT
Fitted to the rear of the cylinder head and performs
the function of maintaining the engine at optimum
temperature:
Q
With the temperature < 88 +/- 2 °C the thermostat
valve (closed) directs fluid directly toward the
pump.
Q
With the temperature > 88 +/- 2 °C the thermostat
valve (open) directs the coolant directly toward the
radiator.
The engine coolant temperature sensor is fitted on
the thermostat and is connected to the injection
control unit and the instrument panel.
FAN
The two-speed cooling fan increases the heat
dissipation capacity of the radiator and/or air
conditioning condenser.
It is driven directly by the injection control unit on the
basis of a specific operating strategy.