Removing and Installing/Replacing Positioning Motor for Eccentric Shaft

11 37 020 Removing and installing/replacing servomotor for eccentric shaft (N52)







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 colour 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 the electric motor.







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

Using reversible ratchet (1) with hexagon socket wrench, turn screw (2) clockwise in direction of arrow and relieve tension on intermediate shaft.

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







Release screws (3).
Tightening torque: 11 12 5AZ.

NOTE: Screw (4) is under the actuator drive.

Release screw (4).







Turn actuator drive with screw (2) to left in direction of arrow.
The actuator drive can now be pulled out in direction of arrow.

Installation note:
The gearing of the worm gear and the eccentric shaft must be greased with Longtime PD 1 (4.1).
Turn shaft (2) to the left until the actuator drive is in contact with the flange of the cylinder head cover..







Assemble engine.
Check function of DME.

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