Removing Drive Chain For Auxiliary Drives

→ Mark running direction of timing chains.

1. Fit special wrench T40049  at the rear of the crankshaft with two screws -arrows-  .
   1. 1.1. When screwing on the special wrench -T40049-  , only use screws with a thread length -a-  of max. 22 mm  .
      Fig 1: Special Wrench T40049

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      Fig 2: Identifying Thread Length

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2. Unscrew screw plug -arrow-  for the "TDC" mark on the crankshaft from the cylinder block.

   Turn crankshaft to "TDC" in direction of rotation of the engine.

   Fig 3: Locating Screw Plug For TDC Mark

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3. Using adapter -T40058-  and an angled ring wrench, turn the crankshaft to "TDC" in direction of rotation of the engine.

   Only turn the crankshaft in direction of rotation of the engine -arrow-! 

   Fig 4: Countering Crankshaft

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4. The notch -A-  must be aligned with the joint -arrow-  .
   Fig 5: Identifying Notch And Joint

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5. Locking pin T40069  must be screwed into the bore hole and tightened to → Tightening torque: 25 Nm (19 ftlb.)  . Turn the crankshaft -1-  back and forth slightly if necessary in order to center the locking pin fully.
   Fig 6: Identifying Locking Pin T40069

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6. Remove chain and chain tensioner.
   1. 6.1. Press the guide rail for the chain tensioner in -direction of arrow-  and lock the chain tensioner in place with the locking pin -T40071-  .
   2. 6.2. Unscrew screws -3-  and remove the balance shaft sprocket.
   3. 6.3. Unscrew screws -1-  and -2-  and remove the chain tensioner and chain.
      Fig 7: Removing Chain Tensioner On Timing Drive For Auxiliary Drive Mechanism

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