11 53 000 Removing And Installing/Replacing Coolant Thermostat (S85)

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW M5, 2009 BMW M6, 2009 BMW M5, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove intake air manifold .
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).

Fig 1: Identifying Water Hoses, Hose Bracket And Banjo Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

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).

Fig 2: Identifying Connecting Pipes

Courtesy of BMW OF NORTH AMERICA, INC.

Remove thermostat (1) in direction of arrow.

Check rubber section (2) for damage.

Fig 3: Removing Thermostat

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Vent cooling system and check for leaks.