64 12 577 Replacing changeover valve for independent/auxiliary heating

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. 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 .

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

Necessary preliminary tasks:

REMOVE FRONT LEFT WHEEL ARCH COVER

Removal:

Release screws (1).

Disconnect fuel line (2).

Fig 1: Identifying Fuel Line And Screws

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Release screws (1).

Unclip the fuel line (2).

Detach the holder (3).

Fig 2: Identifying Holder, Fuel Line And Screws

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IMPORTANT: Risk of damage!
Observe coolant through flow direction, mark coolant hoses before removing.

NOTE: If necessary, catch escaping coolant.

Unlock and disconnect the connector (1).

Release hose clips (2) and detach coolant hoses (3).

Fig 3: Identifying Hose Clips, Connector And Coolant Hoses

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Release screws (4).

Remove changeover valve for independent/auxiliary heating (5).

Installation:

Replacement:

Release screws (1).

Remove holder (2) from changeover valve for independent/auxiliary heating (3).

Fig 4: Identifying Holder From Changeover Valve And Screws

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Position changeover valve for independent/auxiliary heating (5) correctly.

Tighten screws (4).

Attach coolant hoses (3) correctly and secure with spring band clamps (2).

Connect the connector (1).

Fig 5: Identifying Hose Clips, Connector And Coolant Hoses

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Position the holder (3) correctly.

Tighten down the screws (1).

Clip in the fuel line (2).

Fig 6: Identifying Holder, Fuel Line And Screws

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Tighten down the screws (1).

Connect fuel line (2).

Fig 7: Identifying Fuel Line And Screws

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Required reworking:

INSTALL FRONT LEFT WHEEL ARCH COVER
Vent cooling system and check on watertightness. See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT , 17 00 009 CHECKING COOLING SYSTEM FOR WATERTIGHTNESS , 17 00 039 BLEED COOLING SYSTEM AND CHECK FOR WATERTIGHTNESS (N52T, N55) or 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N20)