Thermostat: Service and Repair

Thermostat

Removing

CAUTION!
Hot steam may escape when opening expansion tank. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a rag and open very carefully.

• Always replace gaskets and seals.

- Drain the coolant => [ Cooling System, Draining and Filling ] Cooling System, Draining and Filling.

- Remove the generator.

- Disconnect the coolant hose from the thermostat housing.

- Disconnect the connector - 6 - from the Engine Coolant Temperature (ECT) sensor (on radiator) (G83) - 5 -.





- Unscrew the bolts - 1 - from the thermostat housing - 2 - and remove the housing - 2 - with the coolant thermostat - 4 -.

- Turn the coolant thermostat - 4 - 1/4 turn (90°) to the left and remove it from the housing. - 2 -.

Installing

Installation is performed in reverse order. When doing this note the following:

- Coat new O-ring - 3 - with coolant.





- Insert coolant thermostat - 4 - into the thermostat housing - 2 - and turn to the right 1/4 turn (90°).

• The clip of the thermostat must be positioned at approximately right angle.

- Set the housing - 2 - with the coolant thermostat - 4 - into the cylinder block.

- Tighten housing bolts - 1 - to 15 Nm.

- Connect the connector - 6 - to the Engine Coolant Temperature (ECT) sensor (on radiator) (G83) - 5 -.

- Fill with coolant => [ Cooling System, Draining and Filling ] Cooling System, Draining and Filling.