Disassembling Engine

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Secure the crankshaft.
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 .
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Securing crankshaft

Remove upper chain housing cover -1- .

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

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

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Upper chain housing cover

Remove camshaft actuators.
> 158420 REMOVING AND INSTALLING CAMSHAFT ACTUATORS (INCLUDES SETTING TIMING)
Remove cylinder head cover.
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
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  
  Tightening sequence for cylinder head cover

Remove camshafts.

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

Remove cylinder heads.

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

> WM, 157019 REMOVING AND INSTALLING CYLINDER HEAD

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Cylinder head

Remove crankcase cover at the front.
> 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
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  
  Crankcase cover
Remove lower chain housing 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
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  
  Tightening sequence for chain housing cover
Remove guide and tensioning rails.
> 154719 REMOVING AND INSTALLING GUIDE AND TENSIONING RAILS (V8 BITURBO)

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Guide and tensioning rails
Remove intermediate shaft -1- .
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- .
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Intermediate shaft

Remove piston and connecting rod.

11.1 For re-installation: Mark connecting rod and connecting-rod bearing cap with respect to each other and with respect to the cylinder.
11.2 Unscrew screws -2- and remove connecting-rod bearing cap -1- .
11.3 Push piston out of the crankcase using a wooden handle and remove it with your other hand.

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

Remove crankshaft.
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.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Crankshaft bearing covers
Clean the crankcase and sealing faces.