Installing both exhaust turbochargers

Further information is available.

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 exhaust turbocharger

Check the oil feed and oil return lines for contamination or obstruction and clean or replace as needed.
If the oil feed and/or oil return lines are heavily contaminated, we recommend changing the motor oil and the oil filter.
If installed: Check the coolant feed and coolant return lines for the exhaust 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 filter for contamination and clean or replace as needed.
Check correct functioning of crankcase ventilation.
Replace all gaskets.
Parts: Seals
Replace the seal (1).
Parts: Gasket
Check the pin (arrow) for damage and replace the 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

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 exhaust turbocharger.
Parts: Oil return line
Replace the seal (1).
Parts: Gasket
Replace screws (2).
Parts: Screws
Position screws (2) in oil return line (3).
Position the seal (1) on the screws (2).
Position the oil return line (1).

Screws (2) must be tightened with the aid of an support person.

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TIGHTENING TORQUES SPECIFICATION

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

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Feed in and install the exhaust turbocharger (2) at right with the coolant lines and oil return line.
During installation of the right exhaust 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 TORQUES SPECIFICATION

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 TORQUES SPECIFICATION

Exhaust 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 TORQUES SPECIFICATION

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 TORQUES SPECIFICATION

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

Tighten the banjo bolt (2).

TIGHTENING TORQUES SPECIFICATION

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

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Tighten down screw (1).

TIGHTENING TORQUES SPECIFICATION

Oil feed line to exhaust turbocharger
M6x16	tightening torque	10 Nm

Replace the seal (1).
Parts: Gasket
Check the pin (arrow) for damage and replace the 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

Technically suitable engine oils for BMW Group engines

Courtesy of BMW OF NORTH AMERICA, INC.
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 exhaust turbocharger.
Parts: Oil return line
Replace the seal (1).
Parts: Gasket
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 TORQUES SPECIFICATION

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

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Feed in and install the exhaust turbocharger (2) at left with the coolant lines and oil return line.
When installing the right exhaust turbocharger (2), make sure that the oil return line is correctly positioned in the oil return cover.
Connect connectors (1) and lock.
The connector (1) must engage audibly.

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Replace the V-clip (2).
Parts: V-band clamp
Position V-clip (2).

Tighten down screw (1).

TIGHTENING TORQUES SPECIFICATION

Exhaust 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 TORQUES SPECIFICATION

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

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Feed the coolant return line (2) above the coolant feed line (3).
Connect connectors (1) and lock.

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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 TORQUES SPECIFICATION

Coolant line from exhaust turbocharger to bracket
M6x30	tightening torque	8 Nm

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Remove the lint-free rag (1).
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 TORQUES SPECIFICATION

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

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Tighten down screw (1).

TIGHTENING TORQUES SPECIFICATION

Oil feed line to exhaust turbocharger
M6x16	tightening torque	10 Nm

Position the retaining plate (2).
Secure the wiring harness (1) on the retaining plate (2).

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Position the retaining plate (2).

Tighten down screws (2).

TIGHTENING TORQUES SPECIFICATION

Holder control sensor cable to the cylinder head cover
M6x16	tightening torque	8 Nm

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Connect connectors (3) and lock.
Position union nut (2) and turn it a few times.
Position screw (1) and turn it a few times.

Tighten union nut (2).

TIGHTENING TORQUES SPECIFICATION

Fuel delivery line to high pressure pump
M14	tightening torque	30 Nm

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Tighten down screw (1).

TIGHTENING TORQUES SPECIFICATION

Fuel supply line to cylinder head cover/cylinder head
M6x16	tightening torque	10 Nm

Connect connectors (1) and lock.

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Connect connectors (1) and lock.

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Follow-up work

Refer to INSTALLING THE CLEAN AIR PIPE OF CYLINDER BANK 2 .
Refer to INSTALLING THE LEFT 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 THE FRONT UNDERBODY PROTECTION OR FRONT THRUST FIELD .
Refer to INSTALLING THE FRONT LEFT BOTTOM WHEEL ARCH COVER .
Refer to INSTALLING THE FRONT BOTTOM RIGHT WHEEL ARCH COVER .
Refer to INSTALLING FAN COWL .
Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
Refer to INSTALLING FRONT CROSS CONNECTION .
Refer to INSTALLING THE RIGHT INTAKE FILTER HOUSING WITH THE RIGHT FRONT-END STRUT .
Refer to INSTALLING LEFT INTAKE FILTER HOUSING WITH LEFT FRONT-END STRUT .
Refer to INSTALLING THE COVER ON THE LEFT AND RIGHT IN THE ENGINE COMPARTMENT AT THE TOP .
Refer to INSTALLING THE CATALYTIC CONVERTER FOR CYLINDERS 5 TO 8 .
Refer to RELEASING THE HEAT SHIELD .
Refer to INSTALLING THE CENTER COWL UPPER PART .
Refer to INSTALLING TENSION STRUT ON SHOCK TOWER .
Refer to INSTALLING 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 REAR UNDERSHIELD .
Refer to INSTALLING THE CONNECTING SUPPORTS ON THE TUNNEL .