Removing Actuator For Camshaft (Camshaft Controller)

NOTIFICATION 

Incorrect handling of crankshafts 

• Risk of damage to the timing system 
  1. → Never turn the crankshaft against the rolling direction or when the chain tensioner is removed.
  2. → Proceed carefully with your work.
  3. → Only turn the engine at the crankshaft.
  4. → Observe general warning notes and working regulations.

NOTIFICATION 

Small parts falling into the timing ens: 

• Risk of engine damage 
  1. → Do not let the diamond washer and other small parts fall into the timing case.

Fig 1: Camshaft Control Components Location

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Camshaft control

1. Turn the crankshaft at the vibration balancer using 9714 - socket-wrench insert  so that the staking bore of the vibration balancer -2-  is approx. 45 degrees in front of the lower staking point on the timing-case cover -1-  .

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   Staking bore 45 degrees in front of overlapping TDC of cylinder 1

2. Remove chain tensioner.

   > 153619 REMOVING AND INSTALLING CHAIN TENSIONER 

3. Loosen all four screws on the camshafts (sprockets and camshaft controllers) by one to two turns. Counter at the respective hexagon.

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   Loosening camshafts (shown with timing-case cover removed)

   Information 

   • Move the camshafts carefully. Do not force. 
   • Turn in the other direction if necessary. 

   Information 

   • A data matrix code is shown on the staking dihedron of the camshafts. 
   • This is a square black/white dotted marking used for identification purposes during the production process. 
   • This marking can be used as an aid when inserting the camshafts into the cylinder head. All four camshafts exert the least amount of pressure on the valves when the data matrix code is facing upwards during installation. 
4. Turn all four camshafts so that all data matrix codings on the adjustment edges are pointing upwards almost simultaneously (this enables the camshafts to exert the minimum amount of pressure on the valve lifters) Camshaft position for cylinders 1 to 4 > Camshaft position for cylinders 5 to 8.  The camshafts are turned at their hexagon using an appropriate open-ended wrench Hexagon at camshaft.  Refer to identical information on installing camshafts.

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   Camshaft position for cylinders 1 to 4

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   Camshaft position for cylinders 5 to 8

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   Hexagon at camshaft

5. Loosen timing chain.
6. Remove screw for the respective camshaft controller -1-  (counter at the hexagon) and carefully take out the camshaft controller with both hands under the timing chain Camshaft control.  Carefully loosen the camshaft controller from behind using a rubber hammer if necessary.
   Fig 2: Camshaft Control Components Location

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   Camshaft control

   1	Screw, M12 Tighten fully after setting valve timing. Always use a new screw
   2	Camshaft controller with integrated hexagon for countering
   3	Hydraulic valve for camshaft control
   4	Screw, M5 x 12

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   Loosening camshaft controller

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   Taking camshaft controller out of the chain