11 66 000 Removing and installing/replacing vacuum pump (N55) - up to March 2012

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Special tools required:

Necessary preliminary tasks:

Remove DRIVE BELT .
Remove TENSIONER for drive belt.
Remove SEALING COVER for vacuum pump.
Remove HIGH PRESSURE PUMP .
Disconnect vacuum line from vacuum pump.

Rotate crankshaft at central bolt.

Turn sprocket wheel until drilled holes and screws of vacuum pump match up.

Screw in special tool 11 8 650 .

Secure special tool 11 0 290 in sprocket and to special tool 11 8 650 .

Release screw (1).

Tightening torque 11 66 2AZ .

Fig 1: Releasing Sprocket Screw

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Press chain tensioner (1) with chain in direction of arrow.

Install special tool 11 4 120 .

Remove sprocket (2) in direction of arrow.

Fig 2: Removing Sprocket

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Release screws (1).

Tightening torque 11 66 1AZ .

Release screws (1).

Secure screws (1) against falling out.

Remove vacuum pump.

Installation note:

Replace seal.

Fig 3: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.