11 65 022 Removing and installing/replace exhaust turbocharger for cylinders 1-3 (N54, N54T)

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

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 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)
Release right TRACK ROD from steering gear
Drain COOLANT
Remove coolant EXPANSION TANK
Remove COOLANT THERMOSTAT
Remove COOLANT PUMP
Remove both vacuum accumulators with bracket
Remove right CHARGE-AIR DUCT
Drain ENGINE OIL and collect in a clean container, oil is reused

Release screws (1) and remove protective plate (2) above tie rod.

Fig 1: Identifying Exhaust Turbocharger Protective Plate And Screws

Release screws (1).

Tightening torque 11 42 7AZ .

Installation note:

Replace gasket.

Fig 2: 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.

Fig 3: Identifying Coolant Feed Lines And Screws

Undo 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!

Release screws (1).

Tightening torque 11 53 3AZ .

Remove feed line (2).

Installation note:

Replace O-ring.

Fig 4: Identifying Exhaust Turbocharger Feed Line And Screws

Release screw (1).

Tightening torque 11 53 8AZ .

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

Release screw (3).

Tightening torque 11 53 9AZ .

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

Unfasten coolant return pipe.

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

Fig 5: Identifying Exhaust Turbocharger Coolant Return Pipe Connection And Screws

Release screws (1).

Tightening torque 11 65 2AZ .

Remove retaining plate (2).

Release screws (3).

Tightening torque 11 65 2AZ .

Fig 6: Identifying Exhaust Turbocharger Retaining Plate And Screws

Remove heat shield (1) in direction of arrow.

NOTE: Carefully swing out heat shield (1) in direction of arrow.

Risk of damage!

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

Fig 7: Removing Exhaust Turbocharger Heat Shield

Release screws (1).

Tightening torque 11 65 3AZ .

Set holder (2) down on cylinder head cover.

Fig 8: Identifying Cylinder Head Cover Holder And Screws

Release screw (1).

Tightening torque 11 42 4AZ .

Detach oil feed line in direction of arrow.

Installation note:

Replace O-ring.

Fig 9: Removing Exhaust Turbocharger Oil Feed Line

Release screw (1).

Tightening torque 11 42 5AZ .

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

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

Installation note:

Replace O-rings.

Fig 10: Identifying Exhaust Turbocharger Oil Pressure Line And Screw

Detach vacuum hose from vacuum unit (wastegate valve).

Unscrew nuts (1).

Tightening torque 11 65 1AZ .

Remove turbocharger towards top.

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

Fig 11: Identifying Turbocharger Nuts

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 12: Identifying Exhaust Turbocharger Graphite Sealing Rings, Oil Feed Line And Screw

Installation note:

Replace graphite sealing rings (1).

NOTE: Picture shows turbocharger for cylinders 4 to 6.

Assemble engine.

Delete fault memory in Digital Engine Electronics.

Check air intake system for leaks.

Observe DME instructions.