17 11 100 Removing and installing/renewing coolant expansion tank (N63)

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Drain COOLANT .
Remove left TRAILING LINK .
Remove left INTAKE PORT .
Release EXPANSION TANK for hydraulic steering or dynamic drive and place to one side.

Release screw (1).

Tightening torque 17 10 2AZ .

Release and disconnect coolant hoses (2).

Raise expansion tank (3)

Fig 1: Identifying Coolant Expansion Tank, Hoses And Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) on coolant level switch and disconnect.

Remove expansion tank (2).

Fig 2: Identifying Coolant Expansion Tank And Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

Check cooling system for LEAK TIGHTNESS .