11 37 020 Removing And Installing/Replacing Positioning Motor For Eccentric Shaft (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Aluminum-magnesium materials. No steel screws/bolts may be used due to the threat of electrochemical corrosion. A magnesium crankcase requires aluminum screws/bolts exclusively. Aluminum screws/bolts must be replaced each time they are released . Aluminum screws/bolts are permitted with and without color coding (blue). For reliable identification: Aluminum screws/bolts are not magnetic . Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary tasks:

Remove acoustic cover.
Unfasten ignition wiring harness and lay to one side.
Remove the two rod-type ignition coils next to electric motor.

IMPORTANT: The screw connection must not be released before the servodrive is in the service position.
Risk of damage to intermediate shaft.

Turn ratchet (1) with Allen key (2) clockwise in direction of arrow and relieve tension on intermediate shaft.

NOTE: Do not turn shaft (2) too far.

Fig 1: Turning Ratchet With Allen Key

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (3).

Tightening torque. See 11 12 5AZ in CYLINDER HEAD WITH COVER .

NOTE: Screw (4) is under servodrive.

Release screw (4).

Fig 2: Removing Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Turn servodrive with screw (2) counterclockwise in direction of arrow.

Servodrive can now be withdrawn in direction of arrow.

Installation:

All removed subassemblies are reinstalled in reverse sequence.

Screw in shaft (2) in counterclockwise direction until servodrive rests on flange of cylinder head cover.

Fig 3: Turning Servodrive With Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.