61 31 382 Replacing Level Switch For Coolant

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

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

Release screws (1).

Pull expansion tank (2) in direction of arrow out of grommet (3) underneath and place to one side.

Installation:

Make sure expansion tank (2) is correctly seated in grommet (3).

If necessary, replace grommet (3).

Disconnect plug connection (4).

Fig 1: Identifying Grommet And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: For purposes of clarity, illustration shows expansion tank (2) removed.

IMPORTANT: Do not damage connected water hoses.
Reposition expansion tank as far as possible until coolant level switch (2) forms the highest point. This will prevent coolant from escaping on opening.
If necessary, catch escaping coolant and feed back in later.

Turn coolant level switch (1) in direction of arrow, pull downwards out of expansion tank (2) and remove.

Fig 2: Identifying Coolant Level Switch And Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.