11 28 025 Replace tensioning device pulley for alternator drive belt (N74)

Necessary preliminary tasks: 

• Remove alternator DRIVE BELT 

Remove pulley (2) protective cap.

Release screw (3).

Tightening torque: see 1AZ in 11 28 V-RIBBED BELT WITH TENSION AND DEFLECTION ELEMENT

Remove idler pulley (4).

Fig 1: Identifying Idler Pulley With Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.