WATER PUMP

It is the centrifugal type with vanes secured to the crankcase and operated directly through the timing belt.

THERMOSTAT

Fitted to the rear of the cylinder head and performs the function of maintaining the engine at optimum temperature:

with temperature < 87 ± 2°C the thermostat valve (closed) deviates fluid directly toward the pump.
with temperature > 87 ± 2°C the thermostat valve (open) deviates coolant directly toward the radiator.

The engine coolant temperature sensor is fitted on the thermostat and is connected to the injection control unit (see 1056).