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  .

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• Tighten down screws (1).

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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).

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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 BEARING BRACKET .
• 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 HE 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 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 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 .