Remove left cylinder head

Preliminary work 

• Refer to SUCTIONING THE AIR CONDITIONING .
• Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
• Refer to REMOVING THE LEFT AND RIGHT UNDERSHIELD (TANK COVER) .
• Refer to REMOVING THE REAR LEFT AND RIGHT TENSION STRUT .
• Refer to REMOVING THE LEFT AND RIGHT REAR DIFFUSER .
• Refer to REMOVING THE STIFFENING PLATE .
• Refer to REMOVING EXHAUST SYSTEM .
• Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
• Refer to REMOVING THE ACOUSTIC COVER .
• Refer to REMOVING LEFT OXYGEN CONTROL SENSOR .
• Refer to REMOVING RIGHT OXYGEN CONTROL SENSOR .
• Refer to REMOVING SUSPENSION STRUT BRACE .
• Refer to REMOVING RIGHT SUSPENSION STRUT BRACE .
• Refer to REMOVING INTAKE SILENCER HOUSING .
• Refer to REMOVING COVER FOR THE RIGHT DME CONTROL UNIT .
• Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
• Refer to REMOVING COVER FOR THE DME CONTROL UNIT ON LEFT .
• Refer to REMOVING THE DME CONTROL UNIT FOR CYLINDERS 5 TO 8 .
• Refer to REMOVING THE HOLDER FOR THE DME CONTROL UNIT ON THE LEFT .
• Refer to REMOVING THE RIGHT OXYGEN SENSOR MONITOR .
• Refer to REMOVING LEFT OXYGEN MONITOR SENSOR .
• Refer to REMOVING THE RIGHT-HAND ENGINE VENTILATION LINE AND THE CRANKCASE VENTILATION INTAKE PIPE .
• Refer to REMOVING THE LEFT ENGINE VENTILATION LINE .
• Refer to REMOVING UPPER HEAT SHIELD .
• Refer to RELEASING SCREW BETWEEN THE LEFT AND RIGHT HEAT SHIELD .
• Refer to REMOVING THE LEFT HEAT SHIELD .
• Refer to REMOVING RIGHT HEAT SHIELD .
• Refer to REMOVING THE CATALYTIC CONVERTER FOR CYLINDERS 5 TO 8 .
• Refer to REMOVING THE TOP RIGHT AND LEFT COVER IN THE ENGINE COMPARTMENT .
• Refer to REMOVING UPPER CROSS CONNECTION .
• Refer to REMOVING THE TENSION STRUT AT THE SHOCK TOWER ON THE LEFT AND RIGHT .
• Refer to REMOVING THE REAR TOP CROSS CONNECTION .
• Refer to REMOVING THE LEFT UNFILTERED-AIR DUCT .
• Refer to REMOVING FAN COWL .
• Refer to DRAINING THE COOLANT FROM THE HIGH-TEMPERATURE COOLING SYSTEM .
• Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to RELEASING LEFT CHARGE AIR LINE PARTIALLY .
• Refer to PARTIALLY RELEASING THE RIGHT CHARGE AIR LINE .
• Refer to REMOVING LEFT CLEAN AIR PIPE .
• Refer to REMOVING RIGHT CLEAN AIR PIPE .
• Refer to REMOVING THE COOLANT EXPANSION TANK FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to REMOVING DRIVE BELT
• Refer to REMOVING LEFT CHARGE AIR COOLER .
• Refer to REMOVING RIGHT CHARGE AIR COOLER .
• Refer to REMOVING THE LEFT AND RIGHT EXHAUST TURBOCHARGER .
• Refer to REMOVING THE COOLANT PUMP .
• Refer to REMOVING THE BELT TENSIONER
• Refer to REMOVING THE BELT PULLEY ON THE TORSIONAL VIBRATION DAMPER
• Refer to REMOVING THE IGNITION COIL FROM CYLINDER 1 .
• Refer to REMOVING THE IGNITION COILS OF CYLINDERS 5-8 .
• Refer to RELEASING THE WIRING HARNESS SECTION FROM THE LEFT HAND CYLINDER HEAD COVER .
• Refer to REMOVING THE HIGH-PRESSURE RAIL ON THE LEFT .
• Refer to REMOVING THE INJECTORS FOR CYLINDERS 5 TO 8 .
• Refer to REMOVING FUEL DELIVERY LINE .
• Refer to REMOVING LEFT HIGH PRESSURE PUMP .
• Refer to REMOVING FRONT HEAT SHIELD .
• Refer to REMOVING VANOS SOLENOID ACTUATOR, EXHAUST OF CYLINDER BANK 2 .
• Refer to REMOVING VANOS SOLENOID ACTUATOR, INTAKE OF CYLINDER BANK 2 .
• Refer to REMOVING THE FRONT INTAKE PIPE PARTIALLY .
• Refer to REMOVING LEFT CYLINDER HEAD COVER .
• Refer to REMOVING THE SEALING CAP ON THE CYLINDER HEAD OF THE CYLINDER BANK 2 .
• Refer to MOVING THE CRANKSHAFT TO THE INSTALLATION POSITION TO ADJUSTING THE TIMINGS .
• Refer to CHECKING THE VANOS ADJUSTER OF CYLINDER BANK 2 .
• Refer to RELAXING CHAIN TENSIONER ON BANK 2 FOR CHECKING OR SETTING TIMING .
• Refer to REMOVING HYDRAULIC CHAIN TENSIONER OF CYLINDER BANK 2 .
• Refer to PRELOADING THE TIMING CHAIN OF CYLINDER BANK 2 .
• Refer to FIXING THE ENGINE IN THE INSTALLATION POSITION ON CYLINDER 1 (SET VALVE TIMINGS) .
• Refer to REMOVING BOTH LEFT VANOS ADJUSTERS .
• Refer to REMOVING SPECIAL TOOL FOR FIXING CAMSHAFTS IN POSITION ON BANK 2 .
• Refer to REMOVING SPECIAL TOOL TO PRETENSION TIMING CHAIN ON CYLINDER BANK 2 .

• Prepare the special tool 0 494 116 (11 8 352)  from the set of special tools 0 493 997 (11 8 350)  in a vice.
• Mark special tool 0 494 116 (11 8 352)  in area A = 50 mm.
• Set a punch in the center of the marked area.
• Drill a hole with a diameter of 8.5 mm.

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  NOTE: RISK OF DAMAGE 
  Improper screw length can cause component damage  .
  The use of screws of improper length can lead to component damage  .

  • Note the correct screw length.
  • Install screws that correspond to the original length.
• Tighten the special tool 0 494 116 (11 8 352)  from the set of special tools 0 493 997 (11 8 350)  on the cylinder head with standard M8 screws (1)  .
  TIGHTENING TORQUES SPECIFICATION
  
  

  Special tool to cylinder head bank 2
  M8 screw	tightening torque	25 Nm

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• Loosen hose clamp (1)  .
• Detach the coolant hose from the left cylinder head.

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• Release the wiring harness section (1)  together with the clamps (arrowed) from the intake plenum (2)  .

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• Unlock the connector (1)  and detach from the servomotor.
• Unlock the connector (2)  and detach from pressure sensor on intake plenum.

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• Feed out the coolant hose (1)  and set it aside.

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• Loosen screws (1)  .
• Remove the heat shield (2)  at rear on the cylinder head.

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• Release the screws (1)  the timing case cover.

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• Release the screw of the slide rail on the cylinder head of cylinder bank (1)  .

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• Loosen screws (1)  to (10)  .
  Fig 1: Slide Rail To Cylinder Head Screws Loosening Sequence

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• To remove the cylinder head bolt (1)  on the fifth cylinder, turn camshaft (2)  with standard open-end wrench (3)  on the hexagon head.

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Attach the special tool 0 490 561 (11 0 000)  on the retaining tab (1) and on the special tool 0 494 116 (11 8 352) from the set of special tools 0 493 997 (11 8 350)  .

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• Mind the free movement of the tensioning rails and slide rails  .

  Risk of breakage! 

• Carefully  lift the cylinder head using a workshop crane.
• Carefully feed out and remove the cylinder head with a workshop crane and three support persons.
• Remove cylinder head gasket (1)  .

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