312000123 - 1088C WATER PUMP AND THERMOSTAT
WATER PUMP
This is a centrifugal vane pump with an aluminium alloy casng and phenolic resin impeller.Secured to the engine crankcase and driven directly by the services belt.1. Metal insert2. Pulley3. Shaft4. Plug5. Pump casing6. Dynamic seal7. 6 vane impeller8. Metal insert for impeller9. GasketTHERMOSTAT
Fitted to the rear of the cylinder head, it performs the function of maintaining the engine at optimum temperature:
- with temperature < 80 ± 2°C the thermostat valve (closed) deviates fluid directly toward the pump.
- with temperature > 80 ± 2°C the thermostat valve (open) deviates coolant directly toward the radiator.
A. By-pass valve travel (9 ± 0.5 mm max)1. Thermostat casing2. Main filler (to the radiator)3. O-ring seal4. Seal5. Sensitive element6. Pin7. Main valve8. Main spring9. By-pass spring10. Crosspiece11. By-pass valve12. Gasket13. Engine coolant filler to water/oil heat exchanger14. Engine coolant filler to EGR and passenger compartment heater15. Engine coolant temperature sensorThe engine coolant temperature sensor is fitted on the thermostat and is connected to the injection control unit and the instrument panel. See descriptions 1060G DIESEL INJECTION PRESSURE PUMP ELECTRONIC CONTROL
