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Replacement of thermostat (4-cyl)

Replacement of thermostat (4-cyl)


To remove


1. Open the drain plug and drain the coolant. Remove the lid on the expansion tank to speed up the draining.

2. Remove the cover over the throttle body (turbo).

3. Undo the bypass hose and the pressure pipe between the charge air cooler and the throttle body (turbo).

4. Undo the screw which holds the coolant pipe to the coolant pump.

5. Undo the screw which holds the coolant pipe in the engine's front left-hand corner.

6. Remove the hose to the throttle body's pre- heating and remove the screws which hold the coolant pipe to the lid of the thermostat housing.


7. Remove the lid of the thermostat housing and remove the thermostat.


To fit



1. Fit the thermostat and the lid of the thermostat housing.

2. Refit the coolant pipe, using a new O-ring, to the coolant pump without tightening the screw.


3. Fit the screw in the corner of the engine and the screws securing the coolant pipe to the lid of the thermostat housing but do not tighten them.

4. When the pipe is fixed at all points you can tighten the screws.

5. Reconnect the hose to the throttle body's pre-heating.

6. Make sure that the radiator drain plug is screwed in tight. Fill with coolant and check the system for leaks.

7. Refit the pressure pipe between the charge air cooler and the throttle body and refit the bypass hose (turbo).