Remove left cylinder head

Preliminary work 

• Refer to SUCTIONING THE AIR CONDITIONING .
• Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
• Refer to SUCTIONING THE AIR CONDITIONING .
• Refer to REMOVING THE COVER PANEL OF THE MASTER DME CONTROL UNIT .
• Refer to REMOVING THE COVER PANEL OF THE SLAVE DME CONTROL DEVICE .
• Refer to REMOVING THE ACOUSTIC COVER .
• Refer to REMOVING THE CONTROL UNIT BRACKET FOR CYLINDERS 1 TO 4 .
• Refer to REMOVING IGNITION COIL OF CYLINDER BANK 2 .
• Refer to REMOVING RAIL FROM BANK 2 .
• Refer to DISCONNECTING PLUG CONNECTIONS OF THE INJECTORS OF CYLINDER BANK 2 .
• Refer to REMOVING INJECTORS .
• Refer to REMOVING THE COVER OF THE ENGINE COMPARTMENT AT THE REAR LEFT .
• Removing the cover of the rear right engine compartment.

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  • Loosen the lock (1)
  • Remove the cover (2).

  Covering the vehicle battery 

  WARNING: Unprotected battery terminals. Risk of short circuits! Risk of fire!

  • Cover the vehicle battery

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  NOTE: The following step(s) must be performed if the listed component(s) is/are installed.
  • Cover the vehicle battery with the special tool 2 452 007  as shown.
• Refer to REMOVING LEFT AND RIGHT WIPER ARM .
• Refer to REMOVING THE COWL COVER .
• Refer to REMOVING TRAILING LINK AT SPRING BOLT .
• Refer to REMOVING THE COWL UPPER PART IN THE CENTER .
• Refer to DISCONNECTING THE REFRIGERANT LINE FROM THE EXPANSION VALVE .
• Refer to REMOVING THE REFRIGERANT LINE BETWEEN THE AIR CONDITIONING CONDENSER AND THE EVAPORATOR .
• Refer to REMOVING THE HOLDER WITH THE VEHICLE WIRING HARNESS FOR THE SENSOR SYSTEM OF CYLINDER BANK 1 .
• Refer to REMOVING THE LAMBDA OXYGEN SENSOR FOR THE CYLINDERS 1 TO 4 .
• Refer to REMOVING LAMBDA OXYGEN SENSOR FOR THE CYLINDERS 5 TO 8 .
• Refer to REMOVING HOLDER OF DME CONTROL UNIT FOR CYLINDERS 5 TO 8 .
• Refer to REMOVING LEFT HIGH PRESSURE PUMP .
• Refer to REMOVING COOLANT EXPANSION TANK .
• Refer to REMOVING EXPANSION TANKS FOR THE CHARGE AIR COOLERS .
• Refer to LIFTING THE HEAT SHIELD AT THE SIDE .
• Refer to REMOVING THE OXYGEN SENSOR MONITOR OF CYLINDER BANK 2 .
• Removing conduit from bank 1.

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  • Loosen screws (1).
  • Slide conduit (2) downwards.
• Removing the tank ventilation line of cylinder bank 1 partially.

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  • Press the tank vent line (2) on the catch (1) and unlock.
  • Disconnect the tank vent line (2).
  • Fold the tank vent line (2) to the side
• Refer to REMOVING ENGINE VENTILATION LINE OF CYLINDER BANK 2 .
• Refer to REMOVING THE WIRING HARNESS FROM THE CYLINDER BANK 2 .
• Refer to REMOVING UPPER HEAT SHIELD .
• Refer to REMOVING THE COVER IN THE ENGINE COMPARTMENT ON THE LEFT .
• Refer to REMOVING THE COVER IN THE ENGINE COMPARTMENT ON THE RIGHT .
• Refer to RELEASING LEFT FRONT-END STRUT .
• Refer to RELEASING THE RIGHT FRONT-END STRUT .
• Refer to REMOVING FRONT CROSS CONNECTION .
• Refer to REMOVING LEFT INTAKE SILENCER HOUSING .
• Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 2 .
• Refer to REMOVING RIGHT INTAKE SILENCER HOUSING .
• Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 1 .
• Refer to REMOVING THE REAR TOP CROSS CONNECTION .
• Refer to REMOVING FAN COWL WITH ELECTRIC MOTOR .
• Refer to REMOVING DRIVE BELT .
• Refer to REMOVING THE ALTERNATOR .
• Refer to REMOVING THE BELT TENSIONER .
• Refer to REMOVING THE COOLANT PUMP .
• Refer to REMOVING THE STIFFENING PLATE .
• Refer to REMOVING THE WHEEL ARCH COVER ON THE FRONT LEFT AND BOTTOM RIGHT .
• Refer to DRAINING THE COOLANT FROM THE COOLANT PUMPS .
• Refer to REMOVING OIL FILLER NECK .
• Refer to REMOVING RIGHT CHARGE AIR COOLER .
• Refer to REMOVING LEFT CHARGE AIR COOLER .
• Refer to REMOVING THE INTAKE PIPE .
• Refer to REMOVING LEFT THROTTLE VALVE ASSEMBLY .
• Refer to REMOVING THE HOLDER WITH THE VEHICLE WIRING HARNESS FOR THE SENSOR SYSTEM OF CYLINDER BANK 1 .
• Refer to REMOVING THE HOLDER WITH THE VEHICLE WIRING HARNESS FOR THE SENSOR SYSTEM OF CYLINDER BANK 2 .
• Refer to REMOVING UPPER CATALYTIC CONVERTER NEAR ENGINE FROM CYLINDER BANK 1 .
• Refer to REMOVING THE CATALYTIC CONVERTER NEAR THE ENGINE AT TOPPING OF CYLINDER BANK 2 .
• Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 2 .
• Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 1 .
• Refer to REMOVING LEFT MOUNT .
• Refer to REMOVING RIGHT MOUNT .
• Refer to REMOVING THE LEFT AND RIGHT EXHAUST TURBOCHARGER .
• Refer to REMOVING HEAT SHIELD OF THE CYLINDER HEAD COVER FOR CYLINDERS 1 TO 4 .
• Refer to REMOVING HEAT SHIELD OF CYLINDER HEAD COVER OF CYLINDERS 5 TO 8 .
• Refer to REMOVING BOTH EXHAUST MANIFOLDS .
• Refer to REMOVING FRONT HEAT SHIELD .
• Refer to REMOVING HEAT SHIELD AT BOTTOM .
• Refer to REMOVING FUEL DELIVERY LINE .
• Refer to REMOVING LEFT CYLINDER HEAD COVER .
• Refer to REMOVING THE SEALING CAP ON THE CYLINDER HEAD OF THE CYLINDER BANK 2 .
• Refer to REMOVING THE BELT PULLEY ON THE TORSIONAL VIBRATION DAMPER .
• Refer to MOVING THE CRANKSHAFT INTO THE INSTALLATION POSITION OF CYLINDER BANK 1 .
• 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 SECURING THE ENGINE IN INSTALLATION POSITION AT CYLINDER 1 .
• Refer to INSTALLING THE SPECIAL TOOL TO SECURING THE CAMSHAFTS OF CYLINDER BANK 2 .
• 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 special tool (8.5 mm diameter) 

• 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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• Loosen hose clamp (1)  .
• Pull off coolant hose.

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  NOTE: To provide a better overview: Schematic diagram with partially hidden components.
• Release the wiring harness mountings (1)  below the intake system.

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Remove both exhaust manifolds 

• Loosen screws (1)  .
• Remove exhaust manifold (2)  .

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• Loosen screws (1)  .
• Remove exhaust manifold (2)  .

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• Remove gaskets (1)  .

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Release the cylinder head bolt at the timing case cover 

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

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Release the screw of the slide rail at the cylinder head of cylinder bank 2 

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

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• 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)  .

Release cylinder head, left 

Releasing the left cylinder head 

Fig 1: Left Cylinder Head Screws Loosening Sequence

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• Loosen screws (1)  to (10)  .
• 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 0 490 567 (11 0 020) 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). 
  NOTE: TECHNICAL INFORMATION 
  The work must be performed with vehicle care to prevent component damage.

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

  Risk of breakage. 

• Carefully  lift the cylinder head using a workshop crane.
• Turn the cylinder head to the V-area and feed out.
• Remove cylinder head gasket (1)  .

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