Installing the turbocharger for the cylinders 1 to 4

WARNING: Hot surfaces.
Risk of burning!

Perform all work only on components that have cooled down.

CAUTION: Heavy component.
Heavy components can lead to injury or damage.

Remove and install heavy components with the aid of another person/other persons.

NOTE: RISK OF DAMAGE
Contaminant or foreign body.
Contamination can result in malfunctions, loss of function or leaks.

Adhere to the utmost cleanliness.
Protect components from contamination e.g. by covering.
Close off line connections with seal plugs.

NOTE: TECHNICAL INFORMATION
The sealing surfaces must be free of oil, grease and cleaning agents.

Prepare for the installation of the turbocharger

Check the oil feed lines and oil return lines for contamination or obstruction, clean or replace if necessary.
If the oil feed lines or oil return lines are heavily contaminated, it is recommended that the engine oil and oil filter are changed.
If installed: Check the coolant feed lines and coolant return lines for the turbocharger for contamination or obstruction and clean or replace as needed.
Check the screw connections and plug connections of all lines for accuracy.
Check air cleaner for contamination and clean or replace as needed.
Check correct functioning of crankcase ventilation.
Replace all gaskets.
Parts: Seals
Replace the seal (1).
Parts: Seal
Check the pin (arrow) for damage, replace exhaust manifold if necessary.

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Make sure that the O-ring (1) does not fall into the oil duct in the engine block.
Replace O-ring (1).
Parts: O-ring

If the O-ring (1) cannot be disassembled, the oil return lid must be disassembled.
Coat O-ring (1) with engine oil.

ENGINE OIL DESCRIPTION

Technically suitable engine oils for BMW Group engines

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Loosen screws (2).
Remove the oil return line (1).
Ensure that the sealing surfaces in the area of the oil return line are planar and free from oil and grease.

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Replace oil return line (3) after each disassembly of the turbocharger.
Parts: Oil return line
Replace the seal (1).
Parts: Seal
Replace screws (2).
Parts: Screws
Position screws (2) in oil return line (3).
Position the seal (1) on the screws (2).

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Position the oil return line (1).
Screws (2) must be tightened with the aid of an support person.

TIGHTENING TORQUE SPECIFICATIONS

Oil return line at the turbocharger
M6x16 Replace screws.	Joining torque	5 Nm
M6x16 Replace screws.	Angle of rotation	60°

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Feed in and install the turbocharger (2) at right with the coolant lines and oil return line.
When installing the right turbocharger (2), make sure that the oil return line is correctly positioned in the oil return cover.
Make sure the oil feed line (1) is positioned correctly.

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Fasten the wiring harness mounting (1) to the holder (2).

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Insert the holder (2).
Tighten down screws (1).

TIGHTENING TORQUE SPECIFICATIONS

Holder of sensor system
M6x16 screw	tightening torque	8 Nm

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Replace the V-clip (2).
Parts: V-band clamp
Position V-clip (2).
Tighten down screw (1).

TIGHTENING TORQUE SPECIFICATIONS

Turbocharger to exhaust manifold
V-band clamp Replace V-band clamp.	Tightening torque	20 Nm

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Tighten the screw (1) on the oil return pipe (2).

TIGHTENING TORQUE SPECIFICATIONS

Oil return line to oil return cover
M6	tightening torque	10 Nm

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Connect connectors (1) and lock.
The connector (1) must engage audibly.

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Replace sealing ring (1) of the coolant line (2).
Parts: Sealing ring

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Connect coolant lines (4).
Connect coolant lines (3).
Tighten down screws (2).

TIGHTENING TORQUE SPECIFICATIONS

Coolant line from turbocharger to bracket
M6x30	tightening torque	8 Nm

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Remove the lint-free rag (1).
Connect connectors (1) and lock.

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Replace the screw (1).
Parts: Screw
Replace the sealing ring or sealing rings (2).
Parts: Sealing ring or sealing rings
Make sure that when installing sealing rings without a fitting aid (bridge), both sealing rings are replaced.
Position screw (1) with the sealing ring or sealing rings (2) on the oil feed line.

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Determining the screw type and selecting the appropriate socket wrench:

Screw type	Matching socket wrench
Hexagon screw (3)	Commercial socket wrench (1)
Multi-tooth screw (4)	Multi-tooth socket wrench (2)

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Position oil feed line.
Screw in the banjo bolt (2) several threads.
Hand-tighten the bolt (1).
Tighten the banjo bolt (2).

TIGHTENING TORQUE SPECIFICATIONS

Banjo bolt for oil feed line to turbocharger
M10x1 Replace the screw and sealing rings.	Joining torque	8 Nm
M10x1 Replace the screw and sealing rings.	Angle of rotation	70°

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Tighten down screw (1).

TIGHTENING TORQUE SPECIFICATIONS

Oil feed line to turbocharger
M6x16	tightening torque	10 Nm

Follow-up work

Refer to INSTALLING CLEAN AIR PIPE OF CYLINDER BANK 1 .
Refer to INSTALLING THE RIGHT CHARGE AIR LINE .
Refer to CLOSING THE HIGH-TEMPERATURE COOLANT CIRCUIT .
Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR OR THE FRONT THRUST FIELD .
Refer to INSTALLING FRONT UNDERBODY PROTECTION .
Refer to INSTALLING THE BOTTOM FRONT RIGHT SIDE COVER .
Refer to INSTALLING FAN COWL .
Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
Refer to INSTALLING UPPER CROSS CONNECTION .
Refer to INSTALLING BOTH FRONT-END STRUTS .
Refer to INSTALLING THE CENTER ENGINE COMPARTMENT COVER .
Refer to INSTALLING THE CATALYTIC CONVERTER FOR CYLINDERS 1 TO 4 .
Refer to RELEASING THE HEAT SHIELD .
Refer to INSTALLING THE CENTER COWL UPPER PART .
Refer to INSTALLING TENSION STRUT ON SHOCK TOWER .
Refer to ATTACHING WINDSHIELD PANEL COVER .
Refer to INSTALLING LEFT AND RIGHT WIPER ARM .
Refer to INSTALLING THE REAR RIGHT ENGINE COMPARTMENT COVER .
Refer to INSTALLING THE COVER OF THE ENGINE COMPARTMENT ON THE REAR LEFT .
Refer to INSTALLING RIGHT HEAT SHIELD .
Refer to INSTALLING LEFT HEAT SHIELD .
Refer to INSTALLING HEAT SHIELD, TOP .
Refer to INSTALLING THE RIGHT OXYGEN SENSOR MONITOR .
Refer to INSTALLING THE LEFT OXYGEN SENSOR MONITOR .
Refer to PARTIALLY INSTALLING THE RIGHT LAMBDA OXYGEN SENSOR .
Refer to PARTIALLY INSTALLING THE LEFT LAMBDA OXYGEN SENSOR .
Refer to INSTALLING THE RETAINING BRIDGE .
Refer to INSTALLING EXHAUST SYSTEM .
Refer to INSTALLING CENTER STIFFENING PLATE .
Refer to INSTALLING TANK COVER ON LEFT AND RIGHT .
Refer to INSTALLING REAR BUMPER PANEL .
Refer to INSTALLING BOTH EXHAUST COVERS .
Refer to INSTALLING THE REAR BUMPER TRIM .
Refer to INSTALLING THE REAR DIFFUSER .
Refer to INSTALLING THE TAIL LIGHT ON THE LEFT AND RIGHT SIDE PANELS .
Refer to INSTALLING COVER FOR WATER CHANNEL ON LEFT AND RIGHT .
Refer to INSTALLING THE LUGGAGE COMPARTMENT WHEEL ARCH TRIM PANEL ON THE LEFT AND RIGHT (PARTIALLY REMOVED) .
Refer to INSTALLING LOADING EDGE TRIM .
Refer to INSTALLING LUGGAGE COMPARTMENT FLOOR COVERING .
Refer to FILLING AND VENTING THE HIGH-TEMPERATURE COOLANT CIRCUIT .