Alternator: Service and Repair

12 31 020 Removing And Installing Alternator (N52T)







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 colour 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 work:
- Switch off ignition.
- Disconnect battery earth lead.
- Remove intake silencer housing.
- Remove alternator drive belt.







Release connector (1) and remove.
Slacken nut (2).

Installation note:
Tightening torque 12 42 1AZ.
Disconnect positive battery cable from alternator.

Release screws (3) and remove alternator.

Installation note:
Replace aluminium screws.
Tightening torque 12 31 1AZ.







Assemble engine.