11 37 020 Removing and installing/replacing positioning motor 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.

The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.

Jointing torque and angle of rotation must be observed without fail (risk of damage ).

Necessary preliminary tasks:

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 And Allen Key

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Release screws (3).

For tightening torque refer to 11 12 5AZ in 11 12 CYLINDER HEAD WITH COVER (N52) .

NOTE: Screw (4) is under servodrive.

Release screw (4).

Fig 2: Identifying Intermediate And Servodrive Mounting Screws

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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Servodrive can now be withdrawn in direction of arrow.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

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Assemble engine.

Check function of DME.