Thermostat: Service and Repair

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






Special tools required:
- 17 2 050






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.