17 11 100 Removing and installing/replacing coolant expansion tank (M57T2, N57 D30 O/T/S 0/1)

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

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

Necessary preliminary work:

Follow NOTES FOR CARRYING OUT REPAIR WORK on the cooling system.

Clamp off coolant hose (1) with a suitable tool.

Unlock and detach coolant hose (1).

Catch and dispose of escaping coolant.

Release screws.

Raise coolant expansion tank (2) slightly until the connector for coolant level switch and lower coolant hose are accessible.

Installation note:

Make sure expansion tank is in correct installation position.
Tightening torque: 17 10 2AZ .

Fig 1: Identifying Coolant Hose And Coolant Expansion Tank
Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) and remove.

Clamp off coolant hose (2) with a suitable tool.

Unlock and detach lower coolant hose (2).

Catch and dispose of escaping coolant.

Remove expansion tank (3).

NOTE: The coolant hose is shown removed to for purposes of clarity.

Fig 2: Identifying Coolant Hose, Expansion Tank And Connector

Courtesy of BMW OF NORTH AMERICA, INC.