Thermostat: Service and Repair

11 53 000 Removing and installing or replacing coolant thermostat (N18)

Special tools required:





Warning!
Risk of scalding!
Only perform these tasks on an engine that has cooled down.





Recycling:
Catch and dispose of drained coolant.

Observe country-specific waste disposal regulations.





Necessary preliminary work:
^ Drain coolant from radiator.





Release lock (1) on coolant pipe in direction of arrow.





Disconnect plug connection (1) on coolant thermostat.





Detach all coolant hoses from thermostat.

Note:
^ Release metal hose clamps with special tool 17 2 050.

Unfasten screws (2 and 3).

Tightening torque: 11 53 1AZ.

Note:
Pictures show N12.





Installation note:
Replace gasket (1).





Assemble engine.

Vent cooling system and check for leaks.