Installing left and right turbochargers

Loosen screws (2) .
Remove 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.
Replace the seal (3) .
Parts: Seal

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Replace the oil return line (3) .
Parts: Oil return line
Replace the seal (1) .
Parts: Seal
Position screws (2) in oil return line (3) .
Slide seal (1) onto the screws (2) .

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Position the oil return line (1) .
Tighten down screws (2) .

TIGHTENING TORQUES SPECIFICATION

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

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Make sure that the seal (3) does not fall out during the feed in.
Check oil feed line for contamination or obstruction and clean or replace as needed.
If the oil feed line is heavily contaminated, it is recommended to change the engine oil and oil filter.
Check the clean air ducts on the intake side and charge air cooler for contamination or foreign bodies and clean if necessary.
If installed: Check the coolant feed lines and return lines for turbocharger for contamination or obstruction, clean or replace if necessary.
Check that screw connections and plug connections for all lines are correct.
Check air cleaner for contamination and clean or replace as needed.
Check correct functioning of crankcase ventilation.
Replace all gaskets.
Parts: Seals
Replace O-ring (1) .
Parts: O-ring
Make sure that the O-ring (1) does not fall into the oil duct in the engine block.
If the O-ring (1) cannot be disassembled, the oil return lid must be disassembled.
Coat O-ring (1) with engine oil.

ENGINE OIL SPECIFICATION

Technically suitable engine oils for BMW Group engines

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Thread in turbocharger with oil return line in downward direction and position it.
Make sure that the oil return line is not mechanically deformed.
Connect connectors (1) and lock.

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Replace the V-clip (2) .
Parts: V-band clamp
Position V-clip (2) .
Hand-tighten the bolt (1) .

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Tighten screw (1) on the V-clip.

TIGHTENING TORQUES SPECIFICATION

Turbocharger to exhaust manifold
V-band clamp Replace V-band clamp.	Tightening torque	9 Nm
V-band clamp Replace V-band clamp.	Tightening torque	20 Nm

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Check if the screw connection of the V-band clamp is too loose.
If there is a gap between the ends of the V-band clamps: Loosen the screw and tighten again.

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Check if the screw connection of the V-band clamp is too tight.
When the ends of the V-band clamp are positioned one below the other: Loosen screws and retighten.

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Make sure that the ends of the V-band clamp are parallel to each other.

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Loosen screws (1) .
Remove special tool 2 249 171 (2) .

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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.
Position 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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Tighten down screw (1) .

TIGHTENING TORQUES SPECIFICATION

Oil feed line to turbocharger
Banjo bolt M10x1 Replace screw.	Joining torque	8 Nm
Banjo bolt M10x1 Replace screw.	Angle of rotation	70°

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Tighten down screw (1) .

TIGHTENING TORQUES SPECIFICATION

Oil feed line holder to turbocharger
M6x16 screw	Tightening torque	10 Nm

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Installing right turbocharger

Loosen screws (2) .
Remove oil return line (1) .
Make sure that the sealing surfaces in the area of the oil return line (1) are flat and free of grease.
Replace the seal (3) .
Parts: Seal

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Replace the oil return line (3) .
Parts: Oil return line
Replace the seal (1) .
Parts: Seal
Replace screws (2) .
Parts: Screws
Position screws (2) in oil return line (3) .
Slide seal (1) onto the screws (2) .

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NOTE: TECHNICAL INFORMATION
Complete the following steps with the help of a support person.

Position the oil return line (1) .
Tighten screws (2) with an electronic torque wrench with tightening angle display.

TIGHTENING TORQUES SPECIFICATION

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

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Make sure that the seal (3) does not fall out during the feed in.
Check oil feed line for contamination or obstruction and clean or replace as needed.
If the oil feed line is heavily contaminated, it is recommended to change the engine oil and oil filter.
Check the clean air lines on the intake side and the charge air cooler for contamination or foreign bodies, and clean if necessary.
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 O-ring (1) .
Parts: O-ring
Make sure that the O-ring (1) does not fall into the oil duct in the engine block.
If the O-ring (1) cannot be disassembled, the oil return lid must be disassembled.
Coat O-ring (1) with engine oil.

ENGINE OIL SPECIFICATION

Technically suitable engine oils for BMW Group engines

Courtesy of BMW OF NORTH AMERICA, INC.

Thread in turbocharger with oil return line in downward direction and position it.
Make sure that the oil return line is not mechanically deformed.
Connect connectors (1) and lock.

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Replace the V-clip (2) .
Parts: V-band clamp
Position V-clip (2) .
Hand-tighten the bolt (1) .

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Position special tool 2 249 171 (2) on cylinder head covers.
Tighten special tool 2 249 171 (2) with screws (1) on cylinder head covers. Note the screw length while doing so.

TIGHTENING TORQUES SPECIFICATION

Gauge of turbocharger to cylinder head cover
screw	Tightening torque	10 Nm

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Manually move the screws (1) of the setting gauge up to the contact surface of the turbocharger (2) .
Turbocharger (2) must be aligned on vertical axis on left and right.
Adjust turbocharger (2) parallel to setting gauge.

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Tighten screw (1) on the V-clip.

TIGHTENING TORQUES SPECIFICATION

Turbocharger to exhaust manifold
V-band clamp Replace V-band clamp.	Tightening torque	9 Nm
V-band clamp Replace V-band clamp.	Tightening torque	20 Nm

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Check if the screw connection of the V-band clamp is too loose.
If there is a gap between the ends of the V-band clamps: Loosen the screw and tighten again.

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Check if the screw connection of the V-band clamp is too tight.
When the ends of the V-band clamp are positioned one below the other: Loosen screws and retighten.

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Make sure that the ends of the V-band clamp are parallel to each other.

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Loosen screws (1) .
Remove special tool 2 249 171 (2) .

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Tighten down screw (1) .

TIGHTENING TORQUES SPECIFICATION

Oil return line to crankcase
screw	Tightening torque	10 Nm

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Push hose clamps (1) onto hoses.
Push the hoses onto the connections.
Secure hose clamps (1) .

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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.
Position 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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Tighten screw (1) by hand.

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Tighten screw (1) by hand.

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Tighten down screw (2) .

TIGHTENING TORQUES SPECIFICATION

Oil feed line holder to turbocharger
M6x16 screw	Tightening torque	10 Nm

Tighten down screw (1) .

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TIGHTENING TORQUES SPECIFICATION

Oil feed line to turbocharger
Banjo bolt M10x1 Replace screw.	Joining torque	8 Nm
Banjo bolt M10x1 Replace screw.	Angle of rotation	70°

Follow-up work

Refer to MOUNTING FIXTURE ON THE RIGHT .
Refer to INSTALLING LEFT MOUNT .
Refer to INSTALLING THE CLEAN AIR PIPE OF CYLINDER BANK 2 .
Refer to INSTALLING CLEAN AIR PIPE OF CYLINDER BANK 1 .
Refer to INSTALLING CATALYTIC CONVERTER NEAR THE ENGINE ABOVE CYLINDER BANK 1 .
Refer to INSTALLING UPPER CATALYTIC CONVERTER NEAR ENGINE FOR BANK 2 .
Refer to INSTALLING HEAT SHIELD, TOP .
Refer to INSTALLING EXPANSION TANK FOR THE CHARGE AIR COOLER .
Refer to INSTALLING COOLANT EXPANSION TANK .
Refer to INSTALLING THE HOLDER OF THE DME CONTROL UNIT FOR CYLINDERS 5 TO 8 .
Refer to INSTALLING THE LAMBDA OXYGEN SENSOR FOR CYLINDERS 5 TO 8 .
Refer to INSTALLING THE PRIMARY OXYGEN SENSOR FOR CYLINDERS 1 TO 4 .
Refer to INSTALLING THE CHARGE AIR COOLER ON THE LEFT AND RIGHT .
Refer to CLOSING THE COOLANT PUMPS .
Refer to FILLING THE LOW-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
Refer to VENTING THE LOW-TEMPERATURE COOLING SYSTEM .
Refer to INSTALLING THE WHEEL ARCH COVER ON THE FRONT LEFT AND BOTTOM RIGHT .
Refer to INSTALLING FAN COWL WITH ELECTRIC MOTOR .
Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
Refer to INSTALLING RIGHT INTAKE SILENCER HOUSING .
Refer to INSTALLING LEFT INTAKE SILENCER HOUSING .
Refer to INSTALLING FRONT CROSS CONNECTION .
Refer to TIGHTENING THE LEFT FRONT-END STRUT .
Refer to TIGHTENING THE FRONT-END STRUT ON THE RIGHT .
Refer to INSTALLING THE CENTER ENGINE COMPARTMENT COVER .
Refer to INSTALLING THE FRONT HOOD SEAL .
Refer to INSTALLING ACOUSTIC COVER .
Refer to INSTALLING THE COVER PANEL OF THE SLAVE DME CONTROL UNIT .
Refer to INSTALLING THE COVER PANEL OF THE MASTER DME CONTROL UNIT .
Refer to INSTALLING THE CATALYTIC CONVERTER NEAR ENGINE, BOTTOM AT BANK 1 .
Refer to INSTALLING THE CATALYTIC CONVERTER NEAR ENGINE, BOTTOM AT BANK 2 .
Refer to CONNECTING THE EXHAUST SYSTEM .
Refer to INSTALLING THE STIFFENING PLATE .
Refer to REMOVING UNDERBODY PROTECTION AT SIDE RIGHT AND LEFT .
Refer to INSTALLING FRONT UNDERBODY PROTECTION .
Refer to FILLING THE HIGH-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
Refer to VENTING THE HIGH-TEMPERATURE COOLANT SYSTEM .
Refer to VENTING THE LOW-TEMPERATURE COOLING SYSTEM .
Refer to ACTIVATING VEHICLE ELECTRICAL SYSTEM .
Refer to CHECKING ENGINE OIL LEVEL .