11 65 024 Removing and installing/replace exhaust turbocharger for cylinders 4-6 (N54, N54T)

Necessary preliminary tasks

Remove both catalytic converters . See 18 32 050 REMOVING AND INSTALLING/REPLACE CATALYTIC CONVERTER FOR CYLINDERS 1-3 (N54, N54T) or 11 65 024 REMOVING AND INSTALLING/REPLACE EXHAUST TURBOCHARGER FOR CYLINDERS 4-6 (N54, N54T) .
Remove CHARGE AIR COOLER .
Drain coolant. See 17 00 008 DRAINING AND ADDING COOLANT (N54, N54T) .
remove coolant expansion tank. See 17 11 100 REMOVING AND INSTALLING/REPLACING COOLANT EXPANSION TANK (N53, N54, N54T) .
Remove both vacuum reservoirs.
Remove right CHARGE-AIR DUCT .
Remove the ENGINE SUPPORT ARM on the right (not E60, 61).

Release screws (1).

Tightening torque: 11 42 7AZ .

Installation note:

Replace gasket.

Release screw (2).

Tightening torque: 11 42 8AZ .

Remove oil return pipe in direction of arrow.

Installation note:

Replace O-ring.

Fig 1: Identifying Oil Return Line Screws

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Release screws (1 and 2).

Tightening torque: 11 53 10AZ .

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

IMPORTANT: Do not place pliers on pipes. Risk of damage!

Installation note:

Replace O-rings.

Fig 2: Identifying Coolant Feed Lines And Screws

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Release screws (1).

Tightening torque: 11 53 3AZ .

Remove feed line (2).

Installation note:

Replace O-ring.

Fig 3: Identifying Feed Line Screws

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Release screw (1).

Tightening torque: 11 53 9AZ .

Release coolant return pipe if necessary with suitable pliers.

IMPORTANT: Do not place pliers on pipes. Risk of damage!

Installation note:

Replace O-ring.

Fig 4: Identifying Coolant Return Pipe Screw

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Release screw (1).

Tightening torque: 11 53 8AZ .

IMPORTANT: When detach coolant feed pipe (3), pay attention to linkage of vacuum unit (wastegate valve).
Risk of damage!

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

Fig 5: Identifying Coolant Feed And Return Pipe

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

IMPORTANT: Do not place pliers on pipes. Risk of damage!

Installation note:

Replace O-ring.

Release screws (1).

Tightening torque: 11 65 2AZ .

Remove retaining plate (2).

Release screws (3 and 4).

Tightening torque: 11 65 2AZ .

Fig 6: Identifying Retaining Plate Screws

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

Remove heat shield (3) in direction of arrow.

Remove heat shield (2) in direction of arrow.

Fig 7: Removing Heat Shield

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

Release screw (1).

Tightening torque: 11 42 4AZ .

Detach oil feed line in direction of arrow.

Installation note:

Replace O-ring.

Fig 8: Disconnecting 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 Holder On Cylinder Head Cover With Mounting Screws

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Detach vacuum hose from vacuum unit (wastegate valve).

Unscrew nuts (1).

Remove turbocharger towards bottom.

Tightening torque: 11 65 1AZ .

IMPORTANT: Do not misuse linkage of vacuum unit (wastegate valve) for transportation.
Risk of damage!

Fig 10: Identifying Turbocharger Nuts

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Release screw (2).

Tightening torque: 11 42 5AZ .

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

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

Fig 11: Identifying Oil Feed Line With Screw

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Installation note:

Replace O-rings.

Installation note:

Replace graphite sealing rings (1).

Assemble engine.

Clear fault memory in DME control unit.

Check air intake system for leaks.

Observe DME instructions.