IMPORTANT: Aluminum-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 work:
Release connector (1) and remove.
Slacken nut (2).
Installation note:
Disconnect positive battery cable from alternator.
Release screws (3) and remove alternator.
Installation note:
Replace aluminum screws.
Assemble engine.
BMW X3 Service & Repair Manual > Body repair instructions: Opening welded connections
1. Components made of steel:
1.1 Opening welding spots (resistance pressure spot welding):
Sheet steel panels made from high- and super-high-strength materials make great demands on the
tools used.
Only with special carbide milling cutters can welding spots be drilled out on these sheet panel ...