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Home >> BMW >> 2017 >> X3 sDrive28i >> Repair and Diagnosis >> External Pages >> Different car >> Section 372 (Engine - Repair) >> V-Ribbed Belt With TENSIONER/Deflection Element >> 11 28 050 Replacing A/C compressor drive belt with belt tensioner (N63)

11 28 050 Replacing A/C compressor drive belt with belt tensioner (N63)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
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 work: 

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: Locating Engine Central Bolt Marking
G09952492Courtesy 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.
Fig 2: Locating Engine Central Bolt Marking
G09952493Courtesy of BMW OF NORTH AMERICA, INC.

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

Remove elasto-belt.

Assemble engine.