11 37 020 Removing and installing/replacing positioning motor for eccentric shaft (N51)

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IMPORTANT: Aluminium-magnesium materials.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminium screws/bolts exclusively.

Aluminium screws/bolts must be replaced each time they are released .

Aluminium screws/bolts are permitted with and without color coding (blue).

For reliable identification:

Aluminium 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: Rachet, Allen Key And Removal Directions

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (3).

For tightening torque refer to 11 12 5AZ in 11 12 CYLINDER HEAD WITH COVER (1AZ-12AZ) [N51] .

NOTE: Screw (4) is under servodrive.

Release screw (4).

Fig 2: Vent Hose, Bracket And 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Servodrive can now be withdrawn in direction of arrow.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: Rachet, Allen Key And Removal Directions

Courtesy of BMW OF NORTH AMERICA, INC.