Install both left VANOS adjusters (cylinder head installation cylinder bank 2)

Installing the special tool to secure the camshafts of cylinder bank 2 

Check 

• Position the special tool 2 249 117 (1) on the camshafts of cylinder bank 2.
• Check if the camshafts can be fastened with the special tool 2 249 117 (1).
• Check if the special tool 2 249 117 can be brought in contact with the cylinder head using the two screws of the cylinder head cover (2).

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  Result 

  » The camshafts can be fastened.

  Measure

• Loosen screws (2).

  Remove the special tool 2 249 117 (1).

  Continue the repair in the next step.

  Result 

  » The camshafts cannot be fastened.

  Measure

• Adjust the timings of cylinder bank 2.
• The installation position of the VANOS adjusters must be observed in every case.

  IN is the intake adjuster (1).

  EX is the exhaust camshaft adjuster (2).

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• Replacement:  Replace VANOS adjusters.

  Parts:  VANOS adjusters, exhaust

  Parts:  VANOS adjusters, intake

• Thread VANOS adjusters (1) in and position.

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• Replacement: Replace VANOS central valves.

  Parts:  VANOS central valves, exhaust

  Parts:  VANOS central valves, intake

• Position VANOS central valves (1).
• Tighten VANOS central valves (1) hand-tight.

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Installing the slide rail of cylinder bank 2 (removal/installation/replacement of the VANOS adjuster) 

• Position the slide rail of cylinder bank 2 (3).
• Tighten down screw (2).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Flat-head screw to the slide rail
  Flat-head screw M6x67	Tightening torque	10 Nm

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• Tighten down screw (1).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Collar screw to the slide rail
  Collar screw M6x48	Tightening torque	10 Nm

Preloading the timing chain of cylinder bank 2 

• Position the special tool 2 249 162 on the cylinder head and apply the screws (1) hand-tight.
• Exchange the screw (2) on the special tool 2 249 162 with an (M8x15) hexagon screw.

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• Pretension special tool 2 249 162 using special tool 0 496 778 (00 9 460) at 0.6 Nm.

  The flexible shaft on the special tool  0 496 778 (00 9 460)  must not touch any other components, as the torque value will be falsified. 

  TIGHTENING TORQUE SPECIFICATION
  
  

  Preload timing chain
  tightening torque	0.6 Nm

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• Make straight marks on the VANOS central valves (1) and the VANOS adjusters (2) in the area of the hexagon head.

  The angle must be 60°. 

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• Release the VANOS central valves (1) in the area of the hexagon head in a counterclockwise direction until the upper mark of the VANOS central valve matches with the lower mark.

  The rotational angle is 60°. 

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• Turn the engine counter-clockwise by 90° at central bolt.

  Make sure that the special tools (1) 0 493 882 (11 9 190) and  0 496 366 (11 8 570)  (2) do not collide with other components. 

• Remove the special tool 0 496 366 (11 8 570) (2).

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• Position the special tool (1) 0 493 882 (11 9190)  in the recess on the engine block.
• Turn the engine on the central bolt clockwise until the special tool 0 493 882 (11 9 190) (1) lies against special tool 0 496 366 (11 8 570) (2).
• Tighten special tool 0 496 366 (11 8 570) (2) hand-tight to the vibration absorber with a screw of the belt pulley (3).
• Take out the special tool (1) 0 493 882 (11 9190). 

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Checking the preload of the timing chain for cylinder bank 2 

• Check the preload on the special tool 2 249 162 with the special tool 0 496 778 (00 9 460) with 0.6 Nm.

  The flexible shaft on the special tool  0 496 778 (00 9 460)  must not touch any other components, as the torque value will be falsified. 

  TIGHTENING TORQUE SPECIFICATION
  
  

  Preload timing chain
  tightening torque	0.6 Nm

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• Tighten VANOS central valves (1).
  TIGHTENING TORQUE SPECIFICATION
  
  

  VANOS central valve initial torque
  VANOS central valve	Joining torque	5 Nm

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• Turn engine on the central bolt until the special tool is aligned with the struts on the engine block.
• The special tool 0 496 366 (11 8 570) (3) must be fastened to the vibration absorber with a screw from the belt pulley (2).
• Slide the crankshaft in the installation position with the special tool 0 493 882 (11 9 190) (1) on the bars and fix it.

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• Tighten VANOS central valves (1).
  TIGHTENING TORQUE SPECIFICATION
  
  

  VANOS central valve second tightening
  VANOS central valve	Snug torque	1 30 Nm
  	Snug torque	2 50 Nm

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• Position special tool 0 490 504 (00 9 120) (1) on the VANOS exhaust central valve.

  The magnetic foot of the special tool 0 490 504 (00 9 120) must be attached to a magnetic component in the engine compartment.

• The flexible element of the special tool 0 490 504 (00 9 120) (1) may not collide with other components.

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• Set the angle of rotation on the special tool 0 490 504 (00 9 120) to zero.

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• Tighten VANOS central intake valve until the needle on the special tool 0 490 504 (00 9 120) is at 30°.
  TIGHTENING TORQUE SPECIFICATION
  
  

  VANOS central valve third tightening
  VANOS central valve	Angle of rotation	30°

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• Position special tool 0 490 504 (00 9 120) (1) on the VANOS central intake valve.

  The magnetic foot of the special tool 0 490 504 (00 9 120) must be attached to a magnetic component in the engine compartment.

• The flexible element of the special tool 0 490 504 (00 9 120) (1) may not collide with other components.

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• Set the angle of rotation on the special tool 0 490 504 (00 9 120) to zero.

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• Tighten VANOS central intake valve until the needle on the special tool 0 490 504 (00 9 120) is at 30°.
  TIGHTENING TORQUE SPECIFICATION
  
  

  VANOS central valve third tightening
  VANOS central valve	Angle of rotation	30°

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• Turn the engine clockwise at the central bolt by 2 crankshaft revolutions until the installation position (IP) (1) of the vibration absorber (1) aligns with the struts of the engine block.

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• Check the camshaft positions of bank 1.

  The cams (1) must be in the position shown.

  Increment wheels (2) must form a straight line to the exhaust camshaft bearing cap and the intake camshaft bearing cap.

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  NOTE: Description is for right component only. The procedure on the left side is identical.
  NOTE: To provide a better overview: Schematic diagram with partially hidden components.

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• Ensure that the ground surfaces of camshafts (1) point up.
• Make sure that the rounded surfaces (1) point downwards to the cylinder head.
• Check and evaluate the timing once again.

Remove the special tools to disconnect the crankshaft 

• Remove special tool 0 493 882 (11 9 190) (1).
• Release the screw (2) of the belt pulley.
• Remove special tool 0 496 366 (11 8 570) (3).

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Removing special tool for fixing camshafts in position on bank 2 

• Loosen screws (2).
• Remove the special tool 2 249 117 (1).

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• Turn the engine clockwise at the central bolt by 2 crankshaft revolutions until the installation position (IP) (1) of the vibration absorber (1) aligns with the struts of the engine block.

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Fixing the engine in the installation position on cylinder 1 (set valve timings) 

• Position special tool 0 496 366 (11 8 570) (3) on the vibration absorber.
• Position special tool 0 493 882 (11 9 190) (1) in special tool 0 496 366 (11 8 570). 

  The special tool 0 493 882 (11 9190  ) (1) must not be inserted very far as it may collide with other components while turning the crankshaft.

• Position reversible ratchet.
• Rotate engine on the central bolt until the special tool lines up with the engine block marks.
• Hand-tighten the special tool 0 496 366 (11 8 570) (3) with a screw (2) of the belt pulley on the vibration absorber.
• Slide the crankshaft in the installation position with the special tool 0 493 882 (11 9 190) (1) at the marks and fix it.

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  Check 

• Position special tool 2 249 117 (1) on the camshafts of cylinder bank 2.
• Check whether the camshafts can be fixed with the special tool 2 249 117 (1).
• Check if the special tool 2 249 117 can be brought in contact with the cylinder head using the two screws of the cylinder head cover (2).

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  Result 

  » The camshafts can be fastened.

  Measure

• Loosen screws (2).

  Remove the special tool 2 249 117 (1).

  Continue the repair in the next step.

  Result 

  » The camshafts cannot be fastened.

  Measure

• Adjust the timings of cylinder bank 2.