11 65 035 Removing And Installing/Replacing Charger (BMW ALPINA B7 Radial Compressor)

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove clean air pipe . See 13 71 038 REMOVING AND INSTALLING/REPLACING CLEAN AIR PIPE (BMW ALPINA B7) .
Remove radial compressor drive belt . See 11 28... REMOVING AND INSTALLING/REPLACING RADIAL COMPRESSOR DRIVE BELT (BMW ALPINA B7) .

IMPORTANT: When working on radial compressor:

Engine must be cooled down
Switch off ignition
Do not switch on ignition when charge-air pressure actuator is disconnected (engine limp-home program)
Do not under any circumstances start engine

After completing work:

Check engine oil level
Clear fault memory

Disconnect plug connection (1).

Unlock and detach quick-connect couplings (2).

Unclip cable from holder (3).

Release hose clamps (4) and remove charge air hose.

Installation:

Tightening torque: 5 Nm.

Charge air hose must be installed dry and free from grease!

Fig 1: Identifying Quick-Connect Couplings And Charge Air Hose

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Unscrew screws (1) and (2).

IMPORTANT: Bear in mind different bolt length (risk of damage):

Bolt (1), front: 8x30
Bolt (2), rear: 8x35

Installation:

Tightening torque: 21 Nm.

Fig 2: Identifying Screws

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Unclip vacuum line from holder (1).

Remove screws (2) and (3).

IMPORTANT: Bear in mind different bolt length (risk of damage):

Bolt (2), front: 8x30
Bolt (3), rear: 8x35

Carefully lift out radial compressor (4).

Installation:

Replace both lower sealing rings on radial compressor.

Tightening torque: 21 Nm.

Fig 3: Identifying Vacuum Line And Screws

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IMPORTANT: When reinstalling the radial compressor, make sure that both adapter sleeves (1) are in place.

Fig 4: Identifying Adapter Sleeves

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Modify following components when replacing the radial compressor.

Release screws (1) and modify belt pulley (2) to new radial compressor.

Installation:

Tighten screws crosswise.

Tightening torque: 9 Nm.

IMPORTANT: Make sure that spacer is fitted between radial compressor and belt pulley.

Fig 5: Identifying Screws And Belt Pulley

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Release bolts (1) and modify manifold with charge-air pressure actuator to new radial compressor.

Installation:

Tightening torque: 9 Nm.

IMPORTANT: Follow instructions in the next work step.

Fig 6: Identifying Bolts And Modify Manifold

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Make sure that spacer sleeve (1) is modified in new radial compressor.

Seal (2) must always be replaced.

Fig 7: Identifying Spacer Sleeve And Seal

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Release screws (1) and modify manifold (2) to new radial compressor.

Installation:

Replace seal.

Tightening torque: 9 Nm.

Fig 8: Identifying Screws And Modify Manifold

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