61 31 382 Replacing Level Switch For Coolant

WARNING: This page is about a different car, the 2010 BMW 650i, 2009 BMW 650i, 2008 BMW 650i, 2007 BMW 650i, and 2006 BMW 650i. 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).

Unlock plug connection for coolant level switch (4) and disconnect.

Pull coolant expansion tank (2) in direction of arrow out of grommet (3) underneath.

Installation:

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

If necessary, replace grommet (3).

Fig 1: Identifying Coolant Expansion Tank, Grommet & Screws

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Do not damage connected water hoses.

Reposition coolant expansion tank (2) as far as possible until coolant level switch (4) forms the highest point. This will prevent coolant from escaping on opening.

If necessary, catch escaping coolant and feed back in later.

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

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

Fig 2: Identifying Coolant Level Switch & Coolant Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.