11 28 050 Replacing A/C compressor drive belt with belt tensioner (S63)

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IMPORTANT: Risk of damage.
Release screws (1) on vibration absorber only if removal position is adjusted.
If contaminated with hydraulic fluid: Replace drive belt.
Crank engine at central bolt in direction of engine rotation.

Installation note:

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 DRIVE BELT for alternator.

NOTE: Observe direction of engine rotation.

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

Release screws (1).

Tightening torque 11 28 2AZ .

Fig 1: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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) is reached on vibration absorber.

Fig 2: Identifying Central Bolt And Marking

Courtesy of BMW OF NORTH AMERICA, INC.

Remove elasto-belt.

Assemble engine.