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

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Remove both catalytic converters See 18 32 050 REMOVING AND INSTALLING/REPLACE CATALYTIC CONVERTER FOR CYLINDERS 1-3 (N54, N54T) or 18 32 060 REMOVING AND INSTALLING/REPLACE CATALYTIC CONVERTER FOR CYLINDERS 4-6 (N54, N54T)
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.

Fig 1: Removing Exhaust Turbocharger Oil Return Pipe

Release screw (2).

Tightening torque 11 42 8AZ .

Remove oil return pipe in direction of arrow.

Installation note:

Replace O-ring.

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 Exhaust Turbocharger Coolant Feed Lines And Screws

Release screws (1).

Tightening torque 11 53 3AZ .

Remove feed line (2).

Installation note:

Replace O-ring.

Fig 3: Identifying Exhaust Turbocharger Feed Line And Screws

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.

Installation note:

Replace O-rings.

Fig 4: Identifying Snap Ring, Coolant Feed Pipe, Coolant Return Pipe And Screws

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 Exhaust Turbocharger Retaining Plate And Screws

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 Exhaust Turbocharger Heat Shields

Release screw (1).

Tightening torque 11 42 4AZ .

Detach oil feed line in direction of arrow.

Installation note:

Replace O-ring.

Fig 7: Removing Exhaust Turbocharger Oil Feed Line

Release screws (1).

Tightening torque 11 65 3AZ .

Set holder (2) down on cylinder head cover.

Picture shows E9x.

Fig 8: Identifying Cylinder Head Cover Holder And Screws

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 9: Identifying Exhaust Turbocharger Nuts

Picture shows E9x.

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: Removing Exhaust Turbocharger Oil Feed Line Using Pliers

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.