223000254 - INTRODUCTION - WATER PUMP AND THERMOSTAT (BIPOWER)
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 service 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.