3232862 - 1088C water pump and thermostat

Water pump

It is of the centrifugal vane type, with aluminium alloy pump casing and phenolic resin impeller.It is mounted on the cylinder block/crankcase and driven by the crankshaft via a Poly-V belt.

Thermostat

Fitted on the gearbox side cylinder head, it has the task of keeping the engine at the optimum temperature:

  • at a temperature of < 87 ± 2° C the (closed) thermostatic valve directs the coolant directly towards the pump
  • at a temperature of > 87 ± 2° C the (open) thermostatic valve directs the coolant towards the radiator.
Mounted on the thermostat, there is the coolant temperature sensor connected to the fuel injection control unit.