11 28 010 Removing and installing/replacing drive belt for alternator (N57 Diesel)

Special tools required:

11 3 340 .

IMPORTANT: Check drive belt for coolant and oil residues, replace if necessary.
The drive belt must be replaced if it is contaminated with hydraulic fluid.
If the drive belt is to be reused, mark direction of travel and reinstall drive belt in same direction of rotation. Before removing, note how the drive belt is routed.

Necessary preliminary work:

Remove front ACOUSTIC COVER (not F25)
Remove FAN COWL .

IMPORTANT: Belt tensioner (1) is preloaded.

Fig 1: Identifying Belt Tensioner

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Courtesy of BMW OF NORTH AMERICA, INC.

Increase preload on tensioning pulley (1) with tool (2) until special tool can be positioned on tensioning pulley 11 3 340 (1).

Preload belt tensioner (1).

Both bore holes, see arrow, must be flush.

Fig 2: Increasing Preload On Tensioning Pulley

G09920794

Courtesy of BMW OF NORTH AMERICA, INC.

Routing of drive belt without Dynamic Drive

Remove drive belt.

Fig 3: Identifying Belt Tensioner

G09920795

Courtesy of BMW OF NORTH AMERICA, INC.

Routing of drive belt with Dynamic Drive

Remove drive belt.

Fig 4: Drive Belt Routing Diagram

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Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Installation note:

Check drive belt for correct installation position and, if reusing, observe direction of travel. Risk of damage .