11 13 000 Removing and installing, sealing or replacing oil sump (N52K)

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:

Lower Front Axle

NOTE: The lines must be detached from the oil sump on vehicles with optional extra SA205 (automatic transmission); if necessary, detach oil pump and place to one side.

Unclip electric leads (2) of oxygen monitor sensors from holder (3).

Disconnect plug connections (1) of oxygen monitor sensors and lay to one side.

Release bolts (5) on transmission.

For tightening torque refer to 11 13 7AZ in 11 13 OIL PAN .

Disconnect plug connection (4) on oil level sensor.

Lay holder (3) to one side.

Fig 1: Oxygen Monitor Sensors, Electric Leads, Holder, Plug Connection And Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Detach return hose (2).

IMPORTANT: For vehicles with optional extra SA205 (automatic transmission), bolts of different lengths are installed for mounting the oil sump.

Observe different tightening torques.

Release screws along line (1).

For vehicles with optional extra SA205 (automatic transmission):

For tightening torque refer to 11 13 2AZ in 11 13 OIL PAN .

For tightening torque refer to 11 13 3AZ in 11 13 OIL PAN .

For vehicles without optional extra SA205 (automatic transmission):

For tightening torque refer to 11 13 5AZ in 11 13 OIL PAN .

Fig 2: Screw And Return Hose

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace aluminium screws.

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

IMPORTANT: There must be no adhesive residues in the oil sump retaining threads.

Clean retaining threads.

Installation:

Replace all seals.

Assemble engine.