11 37 020 Removing and installing/replacing servomotor for eccentric shaft (N52T)

Necessary preliminary tasks:

Remove ACOUSTIC COVER

Remove ignition coils (1) next to the servomotor (2).

Detach the ignition wiring harness (3) from the cylinder head cover and place it to one side.

Fig 1: Identifying Ignition Coils, Servomotor And Ignition Wiring Harness From Cylinder Head Cover

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Courtesy of BMW OF NORTH AMERICA, INC.

Unlock the plug connection (1) on the servomotor (2) and disconnect the plug.

Fig 2: Identifying Plug Connection On Servomotor

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Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The servomotor must be returned to its service position before the screws are removed.
Risk of damage to intermediate shaft.

Using a hexagon socket wrench (2) and reversible ratchet, turn the screw (1) to the right as indicated by the arrow. This releases the tension on the intermediate shaft.

NOTE: Do not turn the screw beyond the pressure point.

Fig 3: Using A Hexagon Socket Wrench And Reversible Ratchet, Turn The Screw

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Release the screw (1) beneath the servomotor.

Tightening torque: 11 37 3AZ .

Fig 4: Identifying Servomotor Screw

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Release screws (1).

Tightening torque: 11 37 3AZ .

Fig 5: Identifying Servomotor Screws

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Courtesy of BMW OF NORTH AMERICA, INC.

Turn the screw (1) to the left and remove the servomotor (2) by extracting it in the direction indicated by the arrow.

Fig 6: Removing Servomotor

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If necessary, detach the screws (1) and replace the seal (2).

Fig 7: Identifying Servomotor Seal With Screws

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Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

The gearing of the worm gear and the eccentric shaft must be greased with LONG-TIME PD 1 (4.1) .

Insert the servomotor (1) and turn the screw (2) to the right, continuing until the servomotor (1) is against the sealing flange (3).

Fig 8: Identifying Servomotor, Screw & Sealing Flange

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Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.