Remove The Control Chain

NOTIFICATION 

Timing not set correctly 

• Risk of engine damage 
• Rough running engine 
• Loss of engine power 
  1. → Do not use force when fitting the staking tool.
  2. → Make sure that the gap is equal on both sides.
  3. → When inserting the staking tools, do not use force to turn the camshafts against any resistance.
  4. → The engine must be exactly at top dead centre.
  5. → The opposite cylinder must be at ignition TDC.

1. T40263 - Wrench, SW21-2-  and > T40314 - adapter-1-  must be fitted on the crankshaft -3-  .

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   Tools on crankshaft

2. Use > T40263 - wrench, SW21  and > T40314 - adapter  to turn the crankshaft clockwise until the marking on the vibration damper -1-  is at TDC -2-  .

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   TDC marking on vibration damper

3. Check that the markings on the camshaft actuators (cylinder bank 1) -1 and 2-  are aligned with the reference points -Arrows-  on the camshaft housing. If necessary: Turn the crankshaft one turn further until it is back at TDC.

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   Markings on camshaft actuator (cylinder bank 1)

4. The markings on the camshaft actuators (cylinder bank 2) -1 and 2-  must be aligned with the reference points -Lines-  on the camshaft housing.

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   Markings on camshaft actuator (cylinder bank 2)

5. Remove stoppers on camshafts -1-  .
   1. 5.1  Unscrew screws on stoppers on camshafts -2-  .
   2. 5.2  Remove stoppers -1-  .

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   Stoppers on camshafts

   Information 

   The camshaft clamp must be easy to insert and must not be fitted using a striking tool. 

6. Insert > T40331 - camshaft clamp-2 to 5-  .
   1. 6.1  Tightening adapter for camshaft clamp T40331/2  on camshaft housing 9 Nm 
   2. 6.2  Insert camshaft clamp T40331/1 -3-  on the right cylinder bank 2 with the inscription "B" facing away from the engine.

      Turn the crankshaft back and forth slightly to do this, if necessary.

   3. 6.3  Insert camshaft clamp T40331/1 -3-  on the right cylinder bank 1 with the inscription "B" facing away from the engine.

      Turn the crankshaft back and forth slightly to do this, if necessary.

   4. 6.4  On the right cylinder bank 1, secure camshaft clamps T40331/1, T40331/8 and T40331/5 -3 - to 5-  using T40331/9 -2-  .
   5. 6.5  On the right cylinder bank 2, secure camshaft clamps T40331/1, T40331/8 and T40331/5 -3 - to 5-  using T40331/9 -2-  .
   6. 6.6  Tighten screws on the camshaft clamps -Arrows- Nm  .

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   Camshaft clamp

7. Secure the crankshaft.
   1. 7.1  Unscrew screw plug -1-  from bore -2-  .
   2. 7.2  Screw > T40069 - locking pin  into the bore -2-  by hand.

      Turn the crankshaft back and forth slightly to do this, if necessary.

   3. 7.3  Tighten > T40069 - fastening screw. 20 - N.m 

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   Securing crankshaft

   Information 

   The > T90001 - counterhold tool  can only be inserted at one position. To do this, the markings -1 and 2-  on the camshaft actuator and chain housing must be aligned.

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   T90001 on camshaft actuator

8. Fit > VAS 261 001 - ring spanner insert, a/f 41  with > T90001 - counter-hold tool  on the camshaft actuator. > T90001 on camshaft actuator 

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   T90001 on camshaft actuator

9. Release camshaft actuator -1-  .
   1. 9.1  Counter the camshaft actuator -1-  using > VAS 261 001 - ring spanner insert, a/f 41-2-  and > T90001 -counterhold tool  and loosen using > T90000 - socket E24-3-  .

      Do not unscrew the camshaft actuator -1-  from the camshaft.

   2. 9.2  Mark camshaft actuators and camshafts for re-installation using a coloured marker.

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      Camshaft actuator

10. Lock both chain tensioners -1-  .

    Information 

    The chain tensioner piston is oil-damped and can only be pressed back slowly and with constant pressure.

    1. 10.1  Press the chain tensioner piston -1-  back fully using a screwdriver.
    2. 10.2  Fix the chain tensioner -1-  in place using > T03006 - locking pin-3-  .

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    Securing the chain tensioner

11. Unscrew control valves and remove camshafts actuators.
12. Remove tensioning rail -1-  .
    1. 12.1  Unscrew bearing pin for tensioning rail -2-  .
    2. 12.2  Remove tensioning rail -1-  .

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    Tensioning rail for cylinder bank 1

13. Remove timing chains together with tensioning rail.