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

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Special tools required:

12 7 120

Remove and install alternator drive belt.

Grip alternator shaft with:

internal serration

Fig 1: Identifying Special Tool 12 7 121 And 12 7 122
Courtesy of BMW OF NORTH AMERICA, INC.

Release nut with special tools 12 7 120.

Installation:

Tightening torque: see 12 31 3AZ .