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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 2053 (Engine Electrical System - Repair (N63)) >> Alternator With Drive And Mount >> 12 31... Replacing alternator belt pulley (with overrunning clutch)

12 31... Replacing alternator belt pulley (with overrunning clutch)

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Special tools required: 

Remove and install alternator drive belt.

Grip alternator shaft with:

Release nut with special tools 12 7 120.

Installation: 

Tightening torque 12 31 3AZ  , see 12 31 ALTERNATOR WITH DRIVE AND MOUNTING PARTS .

Fig 1: Installing Alternator Drive Belt
G05476051Courtesy of BMW OF NORTH AMERICA, INC.