11 13 000 Removing and installing, sealing or replacing oil sump (N55) AWD

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IMPORTANT: Aluminum screws/bolts are permitted with and without color coding (blue).
Aluminum screws/bolts must be replaced each time they are released .
For reliable identification:
Aluminum screws/bolts are not magnetic .
Joining torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary tasks:

Remove left CHARGE AIR DUCT .
Drain and add ENGINE OIL .
Remove FRONT AXLE DIFFERENTIAL .
Remove BEARING SUPPORT .
Detach power steering pump and set it aside (Dynamic Drive only). See REMOVING/INSTALLING POWER STEERING PUMP and REMOVING/INSTALLING HYDRAULIC PUMP FOR DYNAMIC DRIVE .
Remove ENGINE SUPPORT ARM .
Detach deflecting element and holder from oil sump.

NOTE: The lines must be detached from the oil sump on vehicles with automatic transmission; if necessary, detach oil pump and place to one side.

Release bolts (3) on transmission.

Tightening torque 11 13 6AZ .

Detach return hose (2).

IMPORTANT: For vehicles with four-wheel drive or automatic transmission, bolts of different lengths are installed for mounting the oil sump.
Observe different tightening torques .

Fig 1: Identifying Bolts, Screws, And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolts along line (1).

For vehicles with four-wheel drive or automatic transmission:

Tightening torque 11 13 2 AND 3AZ .

Additionally for vehicles with four-wheel drive:

Tightening torque 11 13 4AZ .

Installation note:

Replace aluminum screws .

If necessary, release nuts (4). Remove oil level sensor.

Tightening torque 11 13 7AZ .

Installation note:

Replace sealing ring .

IMPORTANT: There must be no adhesive residues in the lower crankcase section retaining threads.
Clean retaining threads and sealing surfaces .

Installation note:

Replace all gaskets .

Assemble engine.