Installing the 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 provided only at one component. The procedure is the same for all other 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 TORQUE SPECIFICATIONS

Special tool 2 288 054 to crankshaft
Tightening torque		20 Nm

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Tighten down screws (1) .

TIGHTENING TORQUE SPECIFICATIONS

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 TORQUE SPECIFICATIONS

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 SUMP .
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 CHECKING CAMSHAFT TIMING .
Refer to INSTALLING THE ACOUSTIC COVER FOR THE OIL SUMP .
Refer to INSTALLING THE THERMOSTAT ON THE TRANSMISSION OIL LINES .
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 RETURNING LINE REMOVED) .
Refer to INSTALLING THE COOLANT RETURNING LINE FOR THE EXHAUST TURBOCHARGER (AUXILIARY COOLANT PUMP IS REMOVED) .
Refer to INSTALLING AUXILIARY COOLANT PUMP FOR THE EXHAUST TURBOCHARGER .
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 INJECTORS .
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 INSTALLING FRONT AXLE DIFFERENTIAL .
Refer to INSTALLING BEARING BRACKET .
Refer to REMOVING ENGINE FROM ASSEMBLY STAND .
Refer to INSTALLING THE RIGHT ENGINE SUPPORT BRACKET (PHEV) .
Refer to TIGHTENING THE OIL DRAIN PLUG .
Refer to TIGHTENING THE OIL FILTER CAP .
Refer to INSTALLING THE DRIVE BELT FOR THE COOLANT PUMP .
Refer to INSTALLING ENGINE .
Refer to TOPPING UP THE MOTOR OIL .