11 65 024 Removing and installing/replacing exhaust-gas turbocharger for cylinders 4-6 (N54)

Necessary preliminary tasks:

Remove both catalytic exhaust-gas converters. See REMOVING CATALYTIC CONVERTER FOR CYLINDERS 1-3 and REMOVING CATALYTIC CONVERTER FOR CYLINDERS 4-6 .
Remove RIGHT ENGINE SUPPORT ARM
Remove COOLANT PUMP
Unlock coolant hose from coolant thermostat to coolant pump and detach
Remove right CHARGE-AIR DUCT
Remove VACUUM UNIT (WASTEGATE VALVE) , cylinders 4-6
Remove AIR DUCT , cylinders 4-6

Release screws (2).

Tightening torque 11 42 7AZ .

Installation:

Replace seal.

Unscrew bolt (3).

Tightening torque 11 42 8AZ .

Remove oil return line (1) in direction of arrow.

Fig 1: Identifying Screws, Bolt And Oil Return Line

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Installation:

Replace O-ring.

IMPORTANT: Risk of damage!
Where necessary, to release the coolant feed lines (3 and 4), do not place pliers on the pipes.

Release screws (1 and 2).

Tightening torque 11 53 10AZ .

If necessary, release coolant feed lines (3 and 4) with suitable pliers at connection.

Installation:

Replace O-rings.

Fig 2: Identifying Coolant Feed Lines And Screws

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NOTE: For purposes of clarity, the illustration shows the released coolant feed lines removed.

Release screws (1).

Tightening torque 11 53 3AZ .

Remove feed line (2).

Installation:

Replace seal.

Fig 3: Identifying Feed Line And Screws

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IMPORTANT: Risk of damage!
Where necessary, to release the coolant return line (2), do not place pliers on the pipe.

Release screw (1).

Fig 4: Identifying Coolant Return Line And Screw

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Tightening torque 11 53 9AZ .

If necessary, release coolant return line (2) with suitable pliers at connection.

Installation:

Replace O-ring.

IMPORTANT: Risk of damage!
Where necessary, to release the coolant feed and return lines (2 and 3), do not place pliers on the pipes.

Release screw (1).

Tightening torque 11 53 8AZ .

If necessary, release coolant feed line (3) with suitable pliers at connection.

Installation:

Replace O-rings.

Fig 5: Identifying Coolant Feed And Return Lines

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If necessary, release coolant return line (2) with suitable pliers at connection and remove.

Installation:

Replace O-rings.

Release screws (1).

Tightening torque 11 65 2AZ .

Remove retaining plate (2).

Unfasten screws (3 and 4).

Tightening torque 11 65 2AZ .

Fig 6: Identifying Retaining Plate And Screws

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IMPORTANT: Risk of damage!
Carefully swing out heat shields (2 and 3) in direction of arrow.
Remove heat shield (3) in direction of arrow.
Remove heat shield (2) in direction of arrow.

NOTE: Coolant feed line (1) can be removed with heat shield (2).

Fig 7: Removing Heat Shields

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Release screw (1).

Tightening torque 11 42 4AZ .

Release oil feed line (2) in direction of arrow.

Installation:

Replace O-ring.

Fig 8: Releasing Oil Feed Line

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Release screws (1).

Tightening torque 11 65 3AZ .

Set holder (2) down on cylinder head cover.

Fig 9: Identifying Screws And Holder

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Unscrew nuts (1).

Tightening torque 11 65 1AZ .

Remove turbocharger (2) downwards through installation location of catalytic converters.

Fig 10: Identifying Turbocharger And Nuts

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Release screw (2).

Tightening torque 11 42 5AZ .

IMPORTANT: Risk of damage!
Where necessary, to release the oil feed line (3), do not place pliers on the pipe.

Fig 11: Identifying Oil Feed Line And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, release oil feed line (3) with suitable pliers at connection and remove.

Installation:

Replace O-rings.

Installation:

Replace graphite sealing rings (1).

Assemble engine.

Clear fault memory in DME control unit.

Carry out BMW LEAK TEST for intake system.

Observe DME control unit instructions.