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Home >> BMW >> 2012 >> 128i 2D Convertible, Eng CD N51, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair (N51) >> Vacuum Pump
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Vacuum Pump

Rotate crankshaft at central bolt.

Rotate camshaft sprocket (3) until drilled holes and screws (1) match up.

Screw in special tool 11 4 362 (adapter).

Secure special tool 11 0 290 in sprocket (3) and on special tool 11 4 362 (adapter).

Release screw (2).

Tightening torque: 11 66 2AZ .

Release screws (1) and secure against falling out.

Tightening torque: 11 66 1AZ .

Remove vacuum pump towards rear.

Installation note: 

Replace gasket.

Fig 1: Identifying Special Tool (11 0 290) And (11 4 362)
G04751256Courtesy of BMW OF NORTH AMERICA, INC.

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

Insert special tool 11 4 120 .

Remove special tool 11 0 290 .

Remove camshaft sprocket (2) in direction of arrow.

Fig 2: Removing Camshaft Sprocket
G05501869Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.