LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 2020 >> 718 Spyder >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 13 Engine - Crank Drive, Pistons 4.0L -- 718 SPYDER >> WM, 131020 Removing And Installing Pistons >> Removing Pistons >> Removing Pistons - Cylinders 4-6

Removing Pistons - Cylinders 4-6

  1. Secure the crankshaft to the main bearing in the middle using > P90028 - holding bridge-1-  .
    1. 1.1  Screw in and tighten two fastening screws -2-  hand-tight.
      G16219223Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      Holding bridge P90028 for crankshaft

  2. Mark installation position of the pistons -4 to 6-  with a touch-up stick.
    G16219224Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Pistons 4 to 6

  3. Turn crankshaft into position.
    G16219225Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Crankshaft (without vibration damper)

    1. 3.1  Screw in screws -2-  by hand.
    2. 3.2  Fit > 9773 - turning device-1-  and turn the crankshaft so that the screws for the connecting-rod bearing caps are accessible.
  4. Remove piston 4 and connecting rod.
    G16219226Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Connecting rod cap screws

    1. 4.1  Unscrew screws on connecting-rod bearing cap -1-  .
    2. 4.2  Remove connecting-rod bearing cap -2-  and bearing shell.
    3. 4.3  Unscrew handle of the > 9783 - assembly aid-2-  and screw the bar into a threaded bore on the connecting rod -1-  .
    4. 4.4  Press piston 4 with connecting rod down out of the cylinder bore.
      G16219227Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      Piston with connecting rod

    5. 4.5  Store the piston together with the connecting-rod bearing cap and bearing shell so that they cannot get mixed up.
    6. 4.6  Repeat these steps for pistons 5 and 6.
  5. Unscrew screws -2-  and remove connecting rod cap and connecting rods -1-  for cylinders 1 to 3.
    G16219228Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Connecting rod for cylinder bank 1

  6. Remove crankshaft sealing rings on the transmission and belt side.

    > WM, 135955 REPLACING CRANKSHAFT SEALING RING - FLYWHEEL SIDE 

    > REPLACING CRANKSHAFT SEALING RING 

  7. Remove > 9773 - turning device-1-  and unscrew screws -2-  .
    G16219229Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Turning crankshaft (without vibration damper)

  8. Remove crankshaft with timing chains from crankcase half for cylinder bank 2. > Crankshaft with timing chains in crankcase half for cylinder bank 2 
    G16219230Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Crankshaft with timing chains in crankcase half for cylinder bank 2

    1. 8.1  Remove bearing shells from crankcase halves and dispose of them.
    2. 8.2  Remove O-ring from crankcase half for cylinder bank 2 and dispose of it.
    3. 8.3  Clean the crankcase and sealing faces.
    4. 8.4

    If pistons or connecting rods have to be replaced: 

  9. Insert connecting rod -1-  with piston into > 9778 - retaining device-2-  (can be used for pistons with a diameter of 102 mm).
    G16219231Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Piston/connecting rod in 9778 - retaining device

    1. 9.1  Remove piston-pin circlip using > 9764 - disassembly tool  .
    2. 9.2  Press out piston pin and place it with the relevant piston to avoid confusion.
  10. If pistons have to be re-installed: 

    Check pistons for wear.

scientia non olet · About LEMON Manuals