18 40 010 Removing and installing/renewing left exhaust manifold (N63O1)

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WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.

Necessary preliminary tasks:

Remove left TURBOCHARGER .
Remove right TURBOCHARGER .
Remove ALTERNATOR

Release screws (1).

Tightening torque 11 65 6AZ

Fig 1: Identifying Screws

G06178815

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 11 65 6AZ

Remove heat shield (2).

Fig 2: Identifying Heat Shield And Screws

G06178816

Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts 1 to 8.

Remove exhaust manifold, bank 2.

Installation note:

Replace gasket.

Fig 3: Left Exhaust Manifold Nuts Tightening/Loosening Sequence (N63 B40/B44 O 1)

G09876688

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace gasket (1) for bank 2.

Fig 4: Identifying Gasket For Bank 2

G09876689

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace gasket on exhaust manifold.

Installation note:

Check locating apparatus on exhaust manifold.

Fig 5: Identifying Exhaust Manifold Locating Apparatus

G06178785

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten all nuts in sequence (1 to 8).

Tightening torque: 11 62 1AZ .

Fig 6: Left Exhaust Manifold Nuts Tightening/Loosening Sequence (N63 B40/B44 O 1)

G09876691

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.