Disassembling Engine

1. 1.1 Unscrew stoppers.
2. 1.2 Turn engine to ignition TDC of cylinder 1.
3. 1.3 Secure the crankshaft using > T40069 - locking pin  .

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Securing crankshaft

1. 2.1 Unscrew screws -2-  and remove chain housing cover -1-  .

   > WM, 153319 REMOVING AND INSTALLING UPPER CHAIN HOUSING COVER (V8 BITURBO)

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   Upper chain housing cover

> 158420 REMOVING AND INSTALLING CAMSHAFT ACTUATORS (INCLUDES SETTING TIMING)

1. 4.1 Unscrew screws -24 to 1-  and remove cylinder head cover.

   > 158219 REMOVING AND INSTALLING CYLINDER HEAD COVER

   Fig 1: Cylinder Head Cover Screws Tightening Sequence

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   Tightening sequence for cylinder head cover

1. 5.1 Unscrew screws -3-  and remove bearing cover -4-  and camshaft -1 and 2-  .

   > 150520 REMOVING AND INSTALLING CAMSHAFTS (V8 BITURBO)

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   Camshafts

1. 6.1 Unscrew screws -2 and 3-  and remove cylinder head.

   > WM, 157019 REMOVING AND INSTALLING CYLINDER HEAD

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   Cylinder head

> WM, 101419 REMOVING AND INSTALLING FRONT CRANKCASE COVER (V8 BITURBO) 

1. 7.1 Unscrew screws -10 to 1-  and remove crankcase cover at the front.
2. 7.2 Screw in three screws uniformly by half a turn each -Arrows-  .
3. 7.3 Remove crankcase cover.
   Fig 2: Crankcase Cover Screws Loosening Sequence

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   Crankcase cover

1. 8.1 Unscrew screws -19 to 1-  and remove lower chain housing cover.

   > 153319 REMOVING AND INSTALLING LOWER CHAIN HOUSING COVER (V8 BITURBO)

   Fig 3: Chain Housing Cover Screws Tightening Sequence

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   Tightening sequence for chain housing cover

> 154719 REMOVING AND INSTALLING GUIDE AND TENSIONING RAILS (V8 BITURBO)

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Guide and tensioning rails

1. 10.1 Lock bracing gear wheel -10-  using > T40362 - locking tool-9-  .
2. 10.2 Unscrew screw -3-  on coolant pump drive gear wheel -2-  and screw -8-  on bracing gear wheel -10-  .
3. 10.3 Remove coolant pump drive gear wheel -2-  and bracing gear wheel -10-  .
4. 10.4 Unscrew screws -7 -  and remove cover -6-  with seal -5-  and axial bearing -4-  .
5. 10.5 Guide out intermediate shaft -1-  .

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Intermediate shaft

1. 11.1 For re-installation: Mark connecting rod and connecting-rod bearing cap with respect to each other and with respect to the cylinder.
2. 11.2 Unscrew screws -2-  and remove connecting-rod bearing cap -1-  .
3. 11.3 Push piston out of the crankcase using a wooden handle and remove it with your other hand.
4. 11.4 Fit connecting-rod bearing cap hand-tight on the connecting rod and set it down on a clean surface after marking it according to the relevant cylinder.

   > WM, 131020 REMOVING AND INSTALLING PISTONS (V8 BITURBO)

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   Connecting-rod bearing cap

1. 12.1 Unscrew > T40069 - locking pin  .
2. 12.2 Remove bearing cover -1-  . Unscrew screws -2 and 3-  and pull off bearing cover -1-  using a puller.
3. 12.3 Remove crankshaft with the help of another person and set it down on a clean surface.

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Crankshaft bearing covers