11 13 000 Removing and installing, sealing or replacing oil sump (N52T)

IMPORTANT: When performing repair work on the engine oil, coolant or fuel circuit, you must protect the alternator against dirt contamination.
Risk of damage!
Cover alternator with suitable materials.
Failure to comply with this procedure may result in an alternator malfunction.

IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).

Necessary preliminary tasks:

Drain and add ENGINE OIL .
Remove FRONT AXLE DIFFERENTIAL .
Remove BEARING SUPPORT .

Release bolts along line (1).

Tightening torque: 11 13 2AZ .

Installation note:

Replace aluminum screws.

Detach transmission oil lines from oil sump.

Tightening torque: 11 13 10AZ .

Release screws (3), gearbox to oil sump.

Fig 1: Identifying Screw And Nuts Of Oil Level Sensor And Sump

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque: 11 13 8AZ .

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

Tightening torque: 11 13 9AZ .

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.