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Home >> BMW >> 2008 >> 323i Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair - E90/E91 (-08); E92/E93 (N51/N52) >> Intake Manifold >> 11 61 050 Removing and installing intake air manifold (N51)

11 61 050 Removing and installing intake air manifold (N51)

Necessary preliminary tasks: 

Open holder (2).

Disconnect plug connection (1) under manifold.

Release both crankcase breathers (3).

Fig 1: Crankcase Breathers, Plug Connection And Holder
G04751268Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Disconnect plug connection (3).

Release bolts (4).

Detach engine wiring harness (2) from manifold and lay to one side.

Fig 2: Engine Wiring Harness, Screws And Plug Connections
G04751269Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1) on oil pressure switch.

Fig 3: Plug Connection And Oil Pressure Switch
G04751270Courtesy of BMW OF NORTH AMERICA, INC.

Release fuel rail (2) and lay to one side.

NOTE: Do not detach fuel line.

Release screws (1).

Unscrew nuts (3).

For tightening torque refer to 11 61 1AZ in 11 61 AIR INTAKE MANIFOLD .

Fig 4: Fuel Rail, Nuts And Screws
G04751271Courtesy of BMW OF NORTH AMERICA, INC.

Raise air intake manifold approx. 10 cm.

Disconnect plug connections (1) at bottom.

Release tank vent line behind throttle valve assembly.

Fig 5: Plug Connections
G04751272Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Replace all seals.

Assemble engine.