12 41 020 Removing and installing/replacing starter (N52K)

WARNING: This page is about a different variant/trim than selected.

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

Unlock plug (1) and remove.

Unfasten nut.

Tightening torque 12 42 2AZ .

Remove battery positive lead (2).

Fig 1: Identifying Plug And Battery Positive Lead

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Installation:

Replace aluminum screws.

Tightening torque 12 41 1AZ .

Unfasten screws (2).

Installation:

Replace aluminum screws.

Tightening torque 12 41 2AZ .

Remove starter motor (3).

Fig 2: Identifying Starter Motor And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check starter pinion and ring gear for damage. Replace starter if necessary.

Assemble engine.