Thermostat

Refit reversing the sequence followed for removal and refer to GROUP 00 for installing the valve gear drive belt and timing and for installing the engine components belt.

THERMOSTAT

This is fitted on the rear of the cylinder head and it keeps the engine at the optimum temperature:

• With the temperature < 80 ± 2°C the thermostatic valve (closed) diverts the fluid directly towards the pump
• with the temperature > 80 ± 2°C the thermostatic valve (open) ducts the coolant fluid towards the radiator.

The engine water temperature sensor connected to the injection control unit and instrument cluster is fitted on the thermostat.

REMOVAL/REFITTING

• Set the car on a lift.

1. Slacken the fastenings and remove the under engine guard.

1. Drain the engine coolant fluid, disconnecting the radiator outlet sleeve.

NOTE: Collect the engine coolant fluid in a suitable container.

• Remove the battery (see GROUP 55).

1. Disconnect the air inlet sleeve from the air box.
2. Disconnect the electrical connection from the air flow meter.
3. Disconnect the oil vapour re-circulation pipe from the oil vapour separator.

1. Loosen the clamps and remove the complete air delivery pipe from the cleaner to the turbocharger.