Installing Pistons - Cylinder Bank 1-3

→ Wear personal protective gear.

→ Secure components to prevent them from falling off suddenly.

1. Assemble the crankcase.

   → 1001Z2 ASSEMBLING ENGINE - TURBO

2. Secure the vibration damper to the crankshaft flange with two screws (M8 x 1 x 25).
3. Turn con-rod journal for cylinder 3 to installation position.
   1. 3.1. To do this, use turning device 9773  to turn the crankshaft to the bottom dead center position U 3/6  at the vibration damper. → Position U 3/6 
      Fig 1: Identifying Vibration Damper (Position U 3/6)

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Pull off the boot on the connecting rod -1-  , set it in a vertical position and secure in place with a centering mandrel 9782  (side with diameter of 23 mm) -2-  .
   Fig 2: Guiding Centering Mandrel Into Assembly Bore

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   View of centering mandrel 9782 in crankcase → Centering the connecting rod using tool 9782 

   Fig 3: Installing Connecting Rod Using Tool 9782

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Install pistons for cylinders 1-3.
   1. 5.1. For re-installation, fit the relevant piston into the related cylinder bore according to the inscription -1 to 3-  .
      Fig 4: Locating Mark Pistons

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. 5.2. Check installation position of pistons. The cone-shaped neck  and data matrix code on the piston -1-  must be facing the intake side, while the matching number -2-  and data matrix code on the connecting rod must be facing the exhaust side.
      Fig 5: Identifying Matching Number On Connecting Rod

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   3. 5.3. Align piston rings. Offset the ring gaps by 120°. Check the twist lock -arrow-  at the second ring groove.
      Fig 6: Locating Twist Lock On Second Piston Ring

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   4. 5.4. Coat piston and tool funnel 9784/2  (diameter: 102 mm) with new engine oil.
   5. 5.5. Insert the piston -1-  as far as required into the assembly sleeve -2-  until the lower edge of the piston is flush with the surface of the sleeve.
      Fig 7: Identifying Lower Edge Of Piston Flush With Surface Of Assembly Funnel

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   6. 5.6. Guide the piston -1-  into the cylinder bore and carefully position the funnel -2-  on the crankcase.
      Fig 8: Inserting Piston Into Cylinder Bore

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   7. 5.7. Press the piston into the cylinder bore immediately and hold the assembly funnel -1-  firmly while doing this. The handle of a hammer -2-  or similar tool can be used to do this.
      Fig 9: Pressing Piston

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   8. 5.8. Remove assembly funnel.
   9. 5.9. Piston assembly aid 9787/1  must now be screwed to the handle of the assembly aid 9598  .
   10. 5.10. Use assembly aid 9787/1 -1-  to press the piston into the cylinder bore as far as the contact surface of the centering mandrel 9782 -2-  .
       Fig 10: Pressing Piston Using Assembly Aid 9787

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   11. 5.11. Pull out the centering mandrel and press the piston down at the same time until the assembly aid is positioned correctly.
6. Fix piston and connecting rod in place using a centering mandrel 9782  (side with diameter of 23 mm).
   Fig 11: Installing Piston And Connecting Rod

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
7. Fit the piston pin.
   1. 7.1. Coat the piston pin (diameter: 23 mm) with new engine oil and slide it onto the disassembly tool 9777  (use 56-mm insert)
   2. 7.2. Secure the tool at the front hexagon -1-  and turn it anti-clockwise as far as it will go at the rear hexagon -2-  .
      Fig 12: Sliding Tool 9777 Into Piston Pin

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   3. 7.3. Slide the piston pin -1-  into the piston/connecting rod eye. Use the tool -2-  to guide the pin past the edge of the cylinder to the piston -arrow-  .
      Fig 13: Fitting Piston Pin

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   4. 7.4. Tap the tool lightly with the ball of your hand, if necessary, while holding the tool firmly in place -1-  . Insert pin as far as it will go.
      Fig 14: Tapping Piston Pin Using Tool

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   5. 7.5. Turn the tool at the rear hexagon -2- in clockwise direction  until it pulls easily out of the piston pin without resistance.
      Fig 15: Loosening Tool 9777 On Piston Pin

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Information 

   • Always replace piston-pin circlips following removal. 
8. Insert new piston-pin circlip into assembly tool 9776/1  .
   1. 8.1. The large hook -1-  on the circlip will have to be at 9 o'clock  position later (when engine is vertical).
      Fig 16: Inserting Large Circlip Hook At 9 O'Clock Position

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. 8.2. Turn the groove for the small hook on the tool -1-  towards the observer.
      Fig 17: Pressing Piston-Pin Circlip Into Tool 9776/1

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   3. 8.3. Slide a new circlip -2-  into the assembly tool and press the edges together.
   4. 8.4. Position the small hook towards the groove -arrow-  . Turn the circlip slightly if necessary.
      Fig 18: Identifying Small Hook Facing Groove

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      Lift up the circlip again and turn it if necessary.

      Fig 19: Turning Piston-Pin Circlip In Tool

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   5. 8.5. Pull back and hold push bar in tool. Place the pipe -1-  on a hard surface. Slowly guide the push bar down and press the circlip into installation position. You should hear a distinct click.
      Fig 20: Pressing Circlip Into Installation Position

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
9. Fit the piston-pin circlip on the piston.
   1. 9.1. Assembly tool 9776/1 -1-  must now be guided into the assembly bore.
      Fig 21: Guiding Tool Into Assembly Bore

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      View of circlip in tool:

      Fig 22: View Of Front Assembly Bore Circlip

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. 9.2. Position the tool with the small hook -arrow-  at about 11 o'clock  position and place it in the assembly groove on the piston.
      Fig 23: Locating Small Hook At 11 O'Clock Position

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   3. 9.3. Carefully turn the tube of the tool to the left and right while pressing slightly against the piston at the same time. You should feel a certain amount of resistance in the half-moon-shaped bore on the piston at both sides.
      Fig 24: Turning Tube Of Tool 9776/1

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   4. 9.4. Press the tube of the tool against the piston and hold it firmly in place. Then, tap the push bar slightly towards the piston with the ball of your hand. The circlip will lock with a clearly audible click.
   5. 9.5. Assembly tool 9776/1  must now be removed.
   6. 9.6. Check that the piston-pin circlip is seated correctly over cylinder bore 2 using a mirror -1-  and a torch. The correct assembly position is clearly visible -2-  .
      Fig 25: Checking Piston-Pin Circlip Using Mirror

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
10. Turn con-rod journal for cylinder 2 to installation position.
    1. 10.1. To do this, use turning device 9773  to turn the crankshaft to the bottom dead center position U 2/5  at the vibration damper.
       Fig 26: Identifying Vibration Damper (Position U 2/5)

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    2. 10.2. Repeat steps  3-- 9 for cylinder 2. Check the position of the circlip over cylinder bore 1.
11. Turn con-rod journal for cylinder 1 to installation position.
    1. 11.1. To do this, use turning device 9773  to turn the crankshaft to the bottom dead center position U 1/4  at the vibration damper.
       Fig 27: Identifying Vibration Damper (Position U 1/4)

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    2. 11.2. Repeat steps  3-- 9 for cylinder 1.
    3. 11.3. The position of the circlip can be checked on cylinder 1 through the assembly bore. The large hook -1-  must be at 9 o'clock position  when the engine is vertical.
       Fig 28: Identifying Piston Circlip Installation Position

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
12. Fit screw plug (M30 x 1.5) -1-  for fitting piston pin with a new sealing ring.
    Fig 29: Identifying Screw Plug And Piston Pins

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 12.1. → Tightening torque: 80 Nm (59 ftlb.) 
13. Complete the engine.

    → WM 1001Z2 ASSEMBLING ENGINE - TURBO