64 12 577 Replacing changeover valve for independent/auxiliary heating

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.

WARNING: Risk of scalding!

Only perform the following repair work on an engine that has cooled down.

Follow notes for repair work on cooling system. See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT or 17 00 039 BLEEDING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N63 B44 O 0) .

Necessary preliminary work

COMPLETELY REMOVE THE INDEPENDENT HEATER .

IMPORTANT: Risk of damage!

Observe marked coolant flow direction.

NOTE: Mark position of coolant hoses prior to dismantling.

Release spring clamps (1) and detach coolant hoses.

Fig 1: Identifying Coolant Hoses And Spring Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Unfasten screws (2).

Remove changeover valve for independent/auxiliary heating (3).

Fig 2: Identifying Independent/Auxiliary Heating Changeover Valve And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

After installation

Top up coolant and vent cooling system. See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT or 17 00 039 BLEEDING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N63 B44 O 0)