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.	1. Tightening torque	20 Nm
Screw Replace screws.	2. Angle of rotation	180°

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Refer to 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	1. Tightening torque	10 Nm
M12x1.5	2. 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 INSTALLING THE OIL PAN .
Refer to INSTALLING THE FLYWHEEL .
Refer to INSTALLING THE VIBRATION DAMPER .
Refer to INSTALLING THE ACOUSTIC COVER FOR THE OIL PAN .
Refer to BLOCKING THE CRANKSHAFT IN THE TDC FIRING POSITION OF CYLINDER 1 .
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 ADJUSTING THE CAMSHAFTS WITH THE SPECIAL TOOL .
Refer to INSTALLING EXHAUST CAMSHAFT ADJUSTER .
Refer to INSTALLING THE INTAKE ADJUSTER .
Refer to INSTALLING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
Refer to INSTALLING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to PRE-TENSIONING THE TIMING CHAIN WITH THE SPECIAL TOOL .
Refer to TIGHTENING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to TIGHTENING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
Refer to DISASSEMBLING ALL SPECIAL TOOLS .
Refer to INSTALLING CHAIN TENSIONER .
Refer to CHECKING THE TIMINGS OF THE CAMSHAFT .
Refer to INSTALLING THE OIL RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to INSTALLING THE COOLANT RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to INSTALLING COOLANT FEED LINE FOR EXHAUST TURBOCHARGER .
Refer to INSTALLING CYLINDER HEAD COVER .
Refer to INSTALLING BOTH ACTUATORS .
Refer to INSTALLING THE HEAT SHIELD ON THE CYLINDER HEAD .
Refer to PREPARING THE INJECTORS FOR INSTALLATION .
Refer to INSTALLING THE RAIL WITH INJECTORS .
Refer to INSTALLING HIGH PRESSURE PUMP .
Refer to INSTALLING THE HIGH-PRESSURE LINE BETWEEN THE HIGH-PRESSURE PUMP AND THE HIGH-PRESSURE RAIL .
Refer to INSTALLING ALL SPARK PLUGS .
Refer to INSTALLING INTAKE PLENUM .
Refer to INSTALLING THE TANK VENT VALVE .
Refer to TOPPING UP THE MOTOR OIL .
Refer to REMOVING THE ENGINE FROM ASSEMBLY JIG .
Refer to INSTALLING ENGINE .