11 13 000 Removing and installing, sealing or replacing oil sump (N51)

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 color 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 engine splash guard.
Secure engine in Installation Position.
Lower Front Axle.
In all-wheel-drive vehicles:
- Remove drive shafts.
- Remove front axle differential.

NOTE: The lines must be detached from the engine oil sump in the case of the optional extra automatic transmission; if necessary, detach vane pump and place to one side.

Release bolts (3) on transmission.

Detach return hose (2).

Release screws along line (1).

For tightening torque refer to 11 13 1AZ in 11 13 OIL PAN .

Fig 1: Screw, Screw Release Line And Return Hose

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace aluminium screws.

If necessary, unfasten screws (4). Remove oil level sensor.

Installation:

Replace all seals.

Assemble engine.