Thermostat: Service and Repair

11 53 000 - Removing and installing/replacing coolant thermostat (S85)





Necessary preliminary tasks:
- Remove intake air manifold Service and Repair.
- Drain coolant.





Release bolt on hose bracket (2).
Unlock and detach water hoses (1).
Unfasten banjo bolt (3).

Installation:
Replace sealing rings.

Release screws (4).





Remove thermostat housing with thermostat in upward direction.
Remove connecting pipes (2).

Installation:
Replace all O-rings on connecting pipes (2).

Clean sealing surface (3).





Remove thermostat (1) in direction of arrow.
Check rubber section (2) for damage.





Assemble engine.
Vent cooling system Venting Cooling System and Checking for Water Leaks and check for leaks.