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 < 83 ± 2° C, the (closed) thermostatic valve directs the coolant directly to the pump
  • at a temperature of > 83 ± 2° C, the (open) thermostatic valve directs the coolant to the radiator.
Mounted on the thermostat, there is the coolant temperature sensor connected to the fuel injection control unit (  See subassembly 1056   PETROL INJECTION SYSTEM ).