Install counterbalance shafts (B48 technical update 0/1)

• Vehicle up to production year 07/16 
• Mount the gears (1) (2) and (3) so that the marks point vertically  up to the oil sump sealing surface (upwards).

  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) so that the marks point vertically  up to the oil sump sealing surface (upwards).

  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 the gear (1).

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• Tighten the nut (1) hand-tight.

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• Make sure that the gears are not switched.

  The gear (1) is marked with an (A)  and must be installed on the exhaust side  .

• Replace the gear (1).

  Parts  : Gear

• Install the gear (1).

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• Make sure that the gears are not switched.

  The gear (1) is marked with an (E)  and must be installed on the intake side  .

• Replace the gear (1).

  Parts  : Gear

• Install the gear (1).

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• Carefully install the counterbalance shafts (1) in the opposite direction of the arrow in the crankcase.

  Do not drop the counterbalance shafts (1) into the bearing positions.

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• Slide the special tool 0 493 681 (64 1 020)  or 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 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 bolts (1) into the counterbalance shafts on the left and right.
• Bolts must (1) not be tightened.

  The counterbalance shafts will be positioned in the next operation.

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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 bolts (1).

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• Make sure the special tool 2 288 054  is correctly fitted in the guides (1) of the counterbalance shaft (2).
• If necessary, turn the crankshaft slightly.
• Tighten special tool 2 288 054  .

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• Tighten the screws (1).

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

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• Align the gear (1) in the direction of the arrow  until it rests against the gear (2).
• Tighten nut (3).

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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 BEARING SUPPORT .
• Refer to INSTALLING FRONT AXLE DIFFERENTIAL .
• Refer to INSTALLING THE ACOUSTIC COVER FOR THE OIL SUMP .
• Refer to INSTALLING THE FLYWHEEL .
• Refer to INSTALLING THE VIBRATION DAMPER .
• 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 PRETENSION 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 RETURNING 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 THE HEAT SHIELD ON THE CYLINDER HEAD .
• Refer to INSTALLING CYLINDER HEAD COVER .
• Refer to INSTALLING BOTH ACTUATORS .
• Refer to PREPARING THE INJECTORS FOR INSTALLATION .
• Refer to INSTALLING THE RAIL WITH INJECTORS .
• Refer to INSTALLING THE HIGH PRESSURE PUMP .
• Refer to INSTALLING HIGH PRESSURE LINE BETWEEN RAIL AND HIGH PRESSURE PUMP .
• Refer to INSTALLING ALL SPARK PLUGS .
• Refer to INSTALLING THE INTAKE PLENUM .
• Refer to INSTALLING THE TANK VENT VALVE .
• Refer to TOPPING UP THE ENGINE OIL .
• Refer to CHECK/ADD FRONT AXLE TRANSMISSION OIL .
• Refer to REMOVING THE ENGINE FROM THE ASSEMBLY STAND .
• Refer to INSTALLING ENGINE .