11 53 000 Removing and installing/replacing coolant thermostat (S63)

WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of scalding!
Only perform this work after engine has cooled down.

Recycling

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste disposal regulations.

Necessary preliminary tasks:

Remove COOLANT PUMP .

Unlock plug connection (1) and pull off.

Unlock and detach coolant hose (2).

Unfasten nut.

Release screws.

Tightening torque 11 53 1AZ .

Remove coolant thermostat (3).

Fig 1: Identifying Plug Connection, Coolant Hose And Coolant Thermostat

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The coolant thermostat is integrated in the housing cap and can only be replaced as a complete unit.

Clean sealing surfaces.

Installation note:

Replace sealing ring (1).

Fig 2: Identifying Coolant Thermostat Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

Vent COOLING SYSTEM and check for water leaks.