Removing Camshaft Controller Up To October 2008

→ Never turn the crankshaft against the rolling direction or when the chain tensioner is removed.

→ Proceed carefully with your work.

→ Only turn the engine at the crankshaft.

→ Reset the timing after working on the camshaft.

→ Observe general warning notes and working regulations.

→ Do not let the diamond washer and other small parts fall into the timing case.

Information 

• The diamond washers on the camshaft controllers must be replaced following the complete removal of the camshaft controllers. If the fastening screw for the camshaft controller is only loosened in order to set the timing (1 or 2 revolutions), the diamond washer does not need to be replaced. 

1. Turn the crankshaft at the vibration balancer so that the vibration balancer's staking bore -2-  is located approx. 45° degrees in front of the lower staking point on the timing-case cover -1-  .
   Fig 1: Staking Bore 45 Degrees Before TDC Of Cylinder 1

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2. Remove chain tensioner. → Removing chain tensioner  .
3. Loosen all four screws on the camshafts (sprockets and camshaft controllers) by one to two turns. Counter at the respective hexagon.
   Fig 2: Loosening Camshafts

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   Information 

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

   Information 

   A data matrix coding is shown on the staking dihedron of the camshafts. This is a square black/white dotted marking used for electronic 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 press against the valves the least when the data matrix coding is facing upwards during installation.

4. Turn all four camshafts so that all the data matrix codings at the adjustment edges are pointing upwards almost simultaneously (this enables the camshafts to exert the minimum amount of pressure on the valve lifters) . Observe identical information on assembling the camshafts.
   Fig 3: Identifying Camshaft Position For Cylinders 1 To 4

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   Fig 4: Identifying Camshaft Position For Cylinders 5 To 8

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   Fig 5: Loosening Camshaft Hexagon Screws

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5. Loosen timing chain.
6. Remove screw for the respective camshaft controller -1-  and carefully take out camshaft controller -3-  with both hands under the timing chain . Carefully loosen the camshaft controller from behind using a rubber hammer if necessary . Replace the diamond friction washer when removing the camshaft controller.
   Fig 6: Exploded View Of Camshaft Control

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   1. Screw, M12 Tighten completely after setting timing.
   2. Hexagon sleeve
   3. Camshaft controller
   4. Washer (reusable); replace if disassembled completely
   5. Camshaft control hydraulic valve
   6. Screw, M5 x 12
   1. Direction of travel
      Fig 7: Identifying Hexagon Sleeve And Camshaft Controller Screw

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      Fig 8: Loosening Camshaft Controller

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   Fig 9: Removing Camshaft Controller From Chain

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