Install counterbalance shafts (B48 technical update 0/1)

Vehicle up to production year 07/16
Mount the gears (1) (2) and (3) in such a way that the marks point vertically to the sealing surface of the oil pan (to the top).
Mark on the gear (1) on the intake side: Triangle

Mark on gear (2) on exhaust side: two rectangles

Mark on gear (3) on exhaust side: one rectangle

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Vehicle from production year 07/16
Mount the gears (1) (2) and (3) in such a way that the marks point vertically to the sealing surface of the oil pan (to the top).
Mark on the gear (1) on the intake side: Triangle

Mark on the gear (2) on the exhaust side: Triangle

Mark on gear (3) on exhaust side: one rectangle

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Replace the gear (1).
Parts: Gear
Install gearwheel (1).

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Tighten the nut (1) hand-tight.

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Ensure that the gears are not reversed.
The gearwheel (1) is marked with an (A) and must be installed on the exhaust side .
Replace the gear (1).
Parts: Gear
Install gearwheel (1).

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Ensure that the gears are not reversed.
As gearwheel (1) is marked with an (E) and must be installed on the intake side .
Replace the gear (1).
Parts: Gear
Install gearwheel (1).

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Carefully install the counterbalance shafts (1) against the arrow direction in the crankcase.
The counterbalance shafts (1) must not fall into the bearing positions.

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Slide the special tool 0 493 681 (64 1 020) or push another suitable tool through the gear into the counterbalance shaft.
Carefully insert the counterbalance shaft (1) into the gear on the intake side.

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Slide the special tool 0 493 681 (64 1 020) or push another suitable tool through the gear into the counterbalance shaft.
Carefully insert the counterbalance shaft (1) into the gear on the exhaust side.

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Screw the screws (1) into the counterbalance shafts on the left and right.
Bolts must (1) not be tightened.
The counterbalance shafts are positioned in the next step.

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Rotate the crankshaft to the lower dead center of the first cylinder .
Mount the special tool 2 288 054 and abut the screws (1).

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NOTE: The description is for one component only. The procedure is identical for all further components.
Observe the correct fit of special tool 2 288 054 in the guides (1) of counterbalance shaft (2).
Where appropriate, turn the crankshaft slightly.

Tighten special tool 2 288 054 .

TIGHTENING TORQUES SPECIFICATION

Special tool 2 288 054 to crankshaft
	tightening torque	20 Nm

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Tighten down screws (1).

TIGHTENING TORQUES SPECIFICATION

Drive wheel to counterbalance shafts
Screw Replace screws.	Tightening torque	20 Nm
	Angle of rotation	180°

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Unscrew the bolts (1) and remove the special tool 2 288 054 .

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Move the gear (1) in the arrow direction up against the gear (2).

Tighten nut (3).

TIGHTENING TORQUES SPECIFICATION

Idler gear to crankcase
M12X1.5	Tightening torque	10 Nm
	Angle of rotation	45°

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Replace the sealing cap (1).
Parts: Sealing cap
Make sure the O-rings of the sealing cap (1) are fitted correctly.
Mount both sealing caps (1).

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Follow-up work

Refer to INSTALLING THE OIL DEFLECTOR .
Refer to INSTALLING THE OIL VACUUM PUMP .
Refer to INSTALLING THE REAR TIMING CASE COVER .
Refer to REFITTING ENGINE OIL PAN .
Refer to INSTALLING THE FLYWHEEL .
Refer to INSTALLING THE VIBRATION DAMPER .
Refer to SEALING THE OIL DUCT .
Refer to CLEANING SEALING SURFACES .
Refer to REPLACING CYLINDER HEAD GASKET .
Refer to INSTALLING THE CYLINDER HEAD .
Refer to ATTACHING THE OIL RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to BLOCKING THE CAMSHAFTS .
Refer to INSTALLING EXHAUST CAMSHAFT ADJUSTER .
Refer to INSTALLING THE INTAKE ADJUSTER .
Refer to PRELOAD TIMING CHAIN .
Refer to TIGHTENING THE VANOS CENTRAL VALVE .
Refer to DISASSEMBLING ALL SPECIAL TOOLS .
Refer to CRANKING ENGINE TWICE (AUTOMATIC TRANSMISSION) .
Refer to INSTALLING THE CYLINDER HEAD COVER (ENGINE REMOVED) .
Refer to INSTALLING FRONT ENGINE ENCAPSULATION .
Refer to INSTALLING THE COOLANT FEED LINE FOR THE EXHAUST TURBOCHARGER (COOLANT RETURN LINE REMOVED) .
Refer to INSTALLING THE COOLANT RETURN LINE FOR THE EXHAUST TURBOCHARGER (AUXILIARY COOLANT PUMP REMOVED) .
Refer to INSTALLING BOTH ACTUATORS (ENGINE REMOVED) .
Refer to PREPARING FOR THE INSTALLATION OF THE HIGH PRESSURE PUMP .
Refer to INSTALLING HIGH PRESSURE PUMP .
Refer to INSTALLING FUEL DELIVERY LINE .
Refer to PREPARING THE INJECTORS FOR INSTALLATION .
Refer to INSTALLING THE HIGH-PRESSURE LINE BETWEEN THE HIGH-PRESSURE PUMP AND THE HIGH-PRESSURE RAIL .
Refer to INSTALLING THE IGNITION COILS .
Refer to INSTALLING THE INTAKE PLENUM .
Refer to INSTALLING THE TANK VENT VALVE .
Refer to REMOVING ENGINE FROM ASSEMBLY STAND. .
Refer to TIGHTENING THE OIL DRAIN PLUG .
Refer to TIGHTENING THE OIL FILTER CAP
Refer to INSTALLING THE DRIVE BELT FOR ALTERNATOR .
Refer to INSTALLING ENGINE .
Refer to TOPPING UP THE MOTOR OIL .