11 65 022 Removing and Installing/Replacing Exhaust-Gas Turbocharger For Cylinders 4-6 (N54)

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.

Release screws (1).

Tightening torque, see 11 42 7AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Installation: 

Replace seal.

Release screw (2).

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

Remove oil return pipe in direction of arrow.

Installation: 

Replace O-ring.

Fig 1: Removing Oil Return Pipe

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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.

Installation: 

Replace O-rings.

Fig 2: Identifying Water Pipe And 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 8AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Release coolant return pipe if necessary with suitable pliers.

Installation: 

Replace O-ring.

Fig 4: Identifying Screws

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Release screw (1).

Release coolant return pipe (3) if necessary with suitable pliers.

Release coolant return pipe (2) if necessary with suitable pliers and remove.

Installation: 

Replace O-ring.

Fig 5: Identifying Coolant Return Pipe With Screw

Courtesy of BMW OF NORTH AMERICA, INC.

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 6: Detaching Oil Feed Line

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

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

Fig 7: Identifying Screws

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Release screws (1).

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

Fig 8: Locating Screws

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Remove heat shield (1) in direction of arrow.

Fig 9: Removing Heat Shield

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Release screws (1).

Place retaining plate (2) on cylinder head cover.

Fig 10: Identifying Retaining Plate On Cylinder Head Cover

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Unscrew nuts (1).

Remove turbocharger towards bottom.

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

Fig 11: Identifying Turbocharger Nuts

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Replace graphite rings (1).

Fig 12: Identifying Graphite Rings

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Assemble engine.

Clear DME fault memory.