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

WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work

Drain COOLANT.
Remove left TRAILING LINK.
Remove left intake port. See 13 .. ... REMOVING INTAKE DUCT (N63) .
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 With 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 With Coolant Level Switch Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT.

Check cooling system for LEAK TIGHTNESS.