11 66 000 Removing and installing/replacing vacuum pump (N74)

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IMPORTANT: Installation:
Due to the risk of damage to the engine gaskets/seals and the lack of brake boosting, make sure before starting the engine that all the vacuum lines are connected.

Necessary preliminary tasks:

Press brake pedal several times in order to reduce vacuum pressure in brake booster.
Remove FAN COWL WITH ELECTRIC FAN .

Unlock and detach vacuum line (1).

Unfasten screws (2).

Tightening torque: see 1AZ in 11 66 VACUUM PUMP

Pull off vacuum hose (3).

Fig 1: Identifying Screws, Vacuum Hose And Vacuum Line

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Release screws (1).

Tightening torque: see 1AZ in 11 66 VACUUM PUMP

Remove vacuum pump (3).

Fig 2: Identifying Vacuum Pump Screw

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Drive (1) must be rotated into correct position prior to installation.

Installation:

Replace sealing ring (2) and coat with grease to facilitate fitting.

Fig 3: Identifying Drive And Sealing Ring

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Installation:

Align vacuum pump drive to groove (1) of intake camshaft.

Vacuum pump can be installed easier when groove (1) is vertically aligned.

NOTE: Illustrations show N73.

Fig 4: Identifying Intake Camshaft Groove

Courtesy of BMW OF NORTH AMERICA, INC.

Check function of DME.

Check vacuum pump for leaks and correct operation.