11 28 010 Replacing drive belt for alternator (N54, N54T)

Special tools required:

11 3 340

IMPORTANT: Mark the direction of rotation of the drive belt if it is to be reused.
Depending on the build date (version), the idler pulleys can be fitted with and without grooves.

Necessary preliminary tasks:

Remove FAN COWL

Unfasten hose clip (1).

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

Pull off air hose (2).

Installation note:

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

Recirculated air hose must audibly snap into place.

Fig 1: Removing Boost Pressure Hose Quick Connect Fastener

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

Fig 2: Removing Alternator Drive Belt Line From Holder

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

Fig 3: Identifying Coolant Hose And Bracket

Release screw (1).

Fold air duct (2) down.

NOTE: Do not remove air duct (2).

Fig 4: Folding Down Air Duct

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 .

Fig 5: Securing Belt Tensioner Using Special Tool (11 3 340)

Remove drive belt (1).

Installation note:

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

Pretension tensioning pulley (1) in direction of arrow.

Remove special tool 11 3 340 .

Fig 6: Identifying Alternator Drive Belt

Installation note:

Note arrangement of drive belt

Arrow shows the direction of rotation.

Fig 7: Identifying Drive Belt Rotation Direction

Assemble engine.

Installation note:

Risk of damage!

Check that drive belt is in correct installation position.