Removing and Installing/Replacing Exhaust-Gas Turbocharger for Cylinders 1-3

11 65 022 - Removing and installing/replacing exhaust-gas turbocharger for cylinders 1-3 (N54)





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 exhaust-gas converters
- Release tie rod on steering gear
- Remove intercooler
- Draining coolant
- Remove coolant expansion tank
- Remove coolant thermostat Removing and Installing/Replacing Coolant Thermostat
- Remove coolant pump Service and Repair
- Remove both vacuum reservoirs
- Remove right charge-air duct Replacing Right Charge-Air Duct (N54)





Release screws (1).
Tightening torque 11 42 7AZ 11 42 Oil Filter and Pipes.

Installation Note:
Replace seal.

Release screw (2).

Tightening torque 11 42 8AZ 11 42 Oil Filter and Pipes.
Remove oil return pipe in direction of arrow.

Installation Note:
Replace O-ring.





Undo screws (1 and 2)
Tightening torque 11 53 10AZ 11 53 Thermostat and Connections.
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 11 53 Thermostat and Connections.
Remove feed line (2).

Installation Note:
Replace O-ring.





Release screw (1).
Tightening torque 11 53 8AZ 11 53 Thermostat and Connections.
Release coolant return pipe at connection (2) if necessary with suitable pliers.
Unscrew bolt (3).
Tightening torque 11 53 9AZ 11 53 Thermostat and Connections.
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!





Release screws (1).
Tightening torque 11 65 2AZ 11 65 Turbocharger and Control.
Remove retaining plate (2).
Release screws (3).
Tightening torque 11 65 2AZ 11 65 Turbocharger and Control.





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).





Release screws (1).
Tightening torque 11 65 3AZ 11 65 Turbocharger and Control.
Set holder (2) down on cylinder head cover.





Release screw (1).
Tightening torque 11 42 4AZ 11 42 Oil Filter and Pipes.
Detach oil feed line in direction of arrow.

Installation Note:
Replace O-ring.





Release screw (1).
Tightening torque 11 42 5AZ 11 42 Oil Filter and Pipes.
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.





Detach vacuum hose from vacuum unit (wastegate valve).
Unscrew nuts (1).
Tightening torque 11 65 1AZ 11 65 Turbocharger and Control.
Remove turbocharger towards top.

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





Release screw (2).
Tightening torque 11 42 5AZ 11 42 Oil Filter and Pipes.

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.

Installation Note:
Replace graphite sealing rings (1).

Note:
Picture shows turbocharger for cylinders 4 to 6.





Assemble engine.
Clear fault memory in DME control unit.
Check air intake system for leaks.
Observe DME instructions.