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

Necessary preliminary tasks:

Remove both catalytic converters. See 1832050 REMOVING AND INSTALLING/REPLACING CATALYTIC EXHAUST-GAS CONVERTER FOR CYLINDERS 1-3 (N54) or 1832060 REMOVING AND INSTALLING/REPLACING CATALYTIC EXHAUST-GAS CONVERTER FOR CYLINDERS 4-6 (N54)
Drain COOLANT
Remove coolant EXPANSION TANK
Remove both vacuum reservoirs
Remove right CHARGE AIR DUCT
Drain ENGINE OIL and collect in a clean container, oil is reused
Remove RIGHT ENGINE SUPPORT ARM

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 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 Line With Mounting 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 And Screws

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Release snap ring (1) from linkage of wastegate valve and disengage linkage.

Release screw (5).

Tightening torque 11 53 9AZ .

Release coolant return pipe if necessary with suitable pliers.

Release screw (4).

Tightening torque 11 53 8AZ .

Release coolant feed pipe (2) if necessary with suitable pliers.

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

Fig 4: Identifying Snap Ring, Coolant Return Line And Screws

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Installation note:

Replace O-rings.

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

Release screws (1).

Tightening torque 11 65 2AZ .

Remove retaining plate (2).

Unfasten screws (3 and 4).

Tightening torque 11 65 2AZ .

Fig 5: Identifying Retaining Plates And 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.

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

Fig 6: Removing Heat Shield

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Release screw (1).

Tightening torque 11 42 4AZ .

Detach oil feed line in direction of arrow.

Installation note:

Replace O-ring.

Fig 7: Removing Oil Feed

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Release screws (1).

Tightening torque 11 65 3AZ .

Set holder (2) down on cylinder head cover.

Picture shows E9x.

Fig 8: Identifying Holder And 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!

Picture shows E9x.

Fig 9: Identifying 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.

Installation note:

Replace O-rings.

Fig 10: Identifying Oil Feed Line And Graphite Sealing Rings

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Installation note:

Replace graphite sealing rings (1).

Assemble engine.

Delete fault memory in Digital Engine Electronics.

Check air intake system for leaks.

Observe DME instructions.