11 65 022 Removing and Installing/Replacing Exhaust-Gas Turbocharger For Cylinders 1-3 (N54)

IMPORTANT: It is not necessary to carry out a chassis/wheel alignment check to release the steering tie rod.

Necessary preliminary tasks:

Remove both catalytic exhaust-gas converters.
Remove intercooler.
Drain coolant.
Remove coolant expansion tank.
Remove coolant thermostat. (See 11 53 000 REMOVING AND INSTALLING/REPLACING COOLANT THERMOSTAT (N54) )
Remove coolant pump. (See 11 51 000 REMOVING AND INSTALLING/REPLACING WATER PUMP (N54) )
Remove both vacuum reservoirs.
Remove front pipe to turbocharger.
Remove right charge-air duct. (See 11 61 368 REPLACING CHARGE-AIR DUCT (N54) )
Release tie rod from steering gear.

Release screws (1).

Tightening torque, see 1 42 7AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Installation:

Replace seal.

Release screw (2).

Tightening torque, see 11 42 8AZv in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Remove oil return pipe in direction of arrow.

Installation:

Replace O-ring.

Fig 1: Locating Oil Return Pipe Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Undo screws (1 and 2)

Tightening torque, see 11 53 3AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Release coolant feed lines (3 and 4) if necessary with suitable pliers.

IMPORTANT: Do not position pliers on pipes - risk of damage! .

Fig 2: Identifying Water Pipe & Screws

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Release screws (1).

Tightening torque, see 11 53 9AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Remove feed line (2).

Installation:

Replace O-ring.

Fig 3: Identifying Feed Line With Screws

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Release screw (1).

Tightening torque, see 11 53 6AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Release coolant return pipe at connection (2) if necessary with suitable pliers.

Release screw (3).

Tightening torque, see 11 53 8AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Release coolant return pipe at connection (4) if necessary with suitable pliers.

Unfasten coolant return pipe.

Fig 4: Identifying Coolant Return Pipe Connection

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not position pliers on pipes - risk of damage! .

Release screws (1).

Tightening torque, see 11 65 2AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Remove retaining plate (2).

Release screws (3).

Tightening torque see 11 65 2AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Fig 5: Identifying Retaining Plate & Screws

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Remove heat shield (1) in direction of arrow.

NOTE:

Carefully swing heat shield out in direction of arrow - risk of damage!

Coolant feed pipe can be removed with heat shield.

Fig 6: Removing Heat Shield

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Release screws (1).

Place retaining plate (2) on cylinder head cover.

Fig 7: Identifying Retaining Plate On Cylinder Head Cover

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Release screw (1).

Tightening torque, see 11 42 4AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Detach oil feed line in direction of arrow.

Installation:

Replace O-ring.

Fig 8: Detaching Oil Feed Line

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Release screw (1).

Tightening torque, see 11 42 5AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Release oil pressure line (2) if necessary with suitable pliers.

IMPORTANT: Do not position pliers on pipes - risk of damage! .

Fig 9: Identifying Oil Pressure Line With Screw

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Unscrew nuts (1).

Remove turbocharger towards top.

Tightening torque, see 11 65 1AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

IMPORTANT:

Risk of damage! To wastegate linkage.

Do not misuse wastegate linkage for carrying.

Fig 10: Identifying Turbocharger Nuts

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Replace graphite rings (1).

NOTE: Illustration shows turbocharger (cyl. 4 to 6).

Fig 11: Identifying Turbocharger Graphite Rings

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Assemble engine.

Clear DME fault memory.