11 28 050 Replacing A/C compressor drive belt with belt tensioner (N74)

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IMPORTANT: Risk of damage!

Release screws (1) on vibration damper only if removal position is adjusted.

Fig 1: Identifying Screws On Vibration Damper

Courtesy of BMW OF NORTH AMERICA, INC.

If contaminated with hydraulic fluid: Replace drive belt.

Crank engine at central bolt in direction of engine rotation.

Installation:

If the drive belt is to be reused, mark direction of travel and reinstall drive belt in same direction of rotation.

Necessary preliminary tasks:

Remove alternator DRIVE BELT

NOTE: Observe direction of engine rotation.

Crank engine at central bolt until marking (see arrow in illustration) is reached on vibration damper.

Release screws (1).

Tightening torque: see 3AZ in 11 28 V-RIBBED BELT WITH TENSION AND DEFLECTION ELEMENT

IMPORTANT: Belt pulley is pretensioned.

Belt pulley tension is relieved abruptly during the cranking process!

NOTE: Observe direction of engine rotation.

Crank engine at central bolt until marking (see arrow in illustration) is reached on vibration damper.

Fig 2: Removing Elasto-Belt

Courtesy of BMW OF NORTH AMERICA, INC.

Remove elasto-belt.

Assemble engine.