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

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 528xi, 2010 BMW 528i, 2009 BMW 528xi, 2009 BMW 528i, and 2008 BMW 528xi. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Procedure shown is for 328.

IMPORTANT: Aluminium-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:

Lower FRONT AXLE CARRIER

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 13 OIL SUMP. .

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 tightening torque refer to 11 13 2AZ in 13 OIL SUMP. .

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

Fig 2: Screw And Return Hose

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace aluminum 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.