3308479 - 1088C water pump and thermostat (Automatic transmission)

WATER PUMP

It is the centrifugal vane type, with an aluminium alloy pump casing and phenolic resin impeller.Secured to the engine block and driven directly by the timing belt.

THERMOSTAT

Mounted on the rear of the cylinder head, its function is to keep the engine at the optimum temperature:

• at a temperature of < 80 ± 2° C the (closed) thermostatic valve directs the coolant directly to the pump
• at a temperature of > 80 ± 2° C the (open) thermostatic valve directs the coolant to the radiator.

The engine coolant temperature sensor and the combined sender unit for the temperature gauge and engine coolant overheating warning light are fitted on the thermostat and connected to the injection control unit (  See subassembly 1060   DIESEL FUEL INJECTION ).