11 28 010 Replacing Alternator Drive Belt (N54)

Special tools required:

11 3 340

IMPORTANT: Mark the direction of rotation of the drive belt if it is to be reused.

Necessary preliminary tasks:

Remove fan cowl.

Unfasten hose clip (1).

Release quick-connect fastener (3) 90° on boost pressure pipe in direction of arrow.

Pull off air hose (2).

Installation:

Bring lock (3) back 90° into installation position.

Recirculated air hose must audibly snap into place.

Fig 1: Identifying Air Hose Installation Position

G04754914

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip line (1) from holder (2) in direction of arrow.

Fig 2: Identifying Air Hose Holder

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Courtesy of BMW OF NORTH AMERICA, INC.

Release coolant hose (1) from holder (2).

Fig 3: Identifying Coolant Hose & Holder

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Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Fold air duct (2) down.

NOTE: Do not remove air duct (2).

Fig 4: Identifying Air Duct With Screw

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Courtesy of BMW OF NORTH AMERICA, INC.

Turn belt tensioner (1) in direction of arrow until bore is flush on housing.

Secure belt tensioner in place with special tool 11 3 340. See 11 3 340 LOCKING PIN (2)

Fig 5: Identifying Belt Tensioner With Special Tool (11 3 340)

G04754918

Courtesy of BMW OF NORTH AMERICA, INC.

Remove drive belt (1).

Installation:

Mark the direction of rotation of the drive belt if it is to be reused.

Fig 6: Identifying Drive Belt

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Courtesy of BMW OF NORTH AMERICA, INC.

Pretension tensioning pulley (1) in direction of arrow.

Remove special tool 11 3 340. See 11 3 340 LOCKING PIN (2)

Fig 7: Identifying Tensioning Pulley

G04754920

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Note arrangement of drive belt

Fig 8: Identifying Drive Belt Installation Position

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Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Installation:

Check that drive belt for is in correct installation position - risk of damage.