11 28 010 Replacing drive belt for alternator (N63)

Special tools required:

IMPORTANT: If contaminated with hydraulic fluid: Replace drive belt.

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:

Coolant hoses do not need to be released!

IMPORTANT: Belt tensioner is under high initial spring preload.

Pre-tension belt tensioner (1) in direction of arrow with tool (2).

Insert special tool 11 0 390 in dowel hole.

Remove drive belt.

Illustration shows N63.

Fig 1: Turning Belt Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Make sure drive belt is in correct installation position.

Assemble engine.