64 12 577 Replacing changeover valve for independent/auxiliary heater

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WARNING: Danger of scalding!
Only perform the following tasks on an engine that has cooled down.
Follow instructions for working on cooling system. See 17 00... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

NOTE: Disconnect coolant hoses from changeover valve for independent/auxiliary heater.

Necessary preliminary tasks:

Remove front left wheel arch trim . See 51 71 040 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER .

IMPORTANT: Risk of damage!
Observe marked coolant flow direction.

Disconnect plug connection (1).

NOTE: Mark position of coolant hoses prior to removal.

Release spring clamps (2) and detach coolant hoses.

Unscrew nuts (3).

Remove changeover valve for independent/auxiliary heater (4) in direction of arrow.

Fig 1: Identifying Spring Clamps, Coolant Hoses, Auxiliary Heater And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Top up coolant and vent cooling system. See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N52) .