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.Mounted on the cylinder block/crankcase, it is operated 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 towards the pump
- at a temperature of > 87 ± 2° C the (open) thermostatic valve directs the coolant towards the radiator.