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Home >> Porsche >> 2011 >> 911 Speedster >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 13 - Engine - CRANKGEAR, Pistons -- CARRERA (997) >> WM 131020 Removing And Installing Pistons (With Cylinder Sleeve) - Gt3 (Gt3, Gt3 RS) >> Removing Pistons - GT3 >> Removal For Cylinder Bank 1-3

Removal For Cylinder Bank 1-3

  1. Mark pistons in installation position with a paint marker (do not scratch piston crown).
    Fig 1: Locating Mark Pistons
    G09816366Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. Mark cylinder housing with a paint marker and lift it carefully up and off the pistons.

    Slide hose pieces or aluminum sleeves over the threaded bolts to protect the pistons and piston rings.

  3. Turn engine clockwise at the crankshaft pulley until piston 1 is at the top dead center.
    NOTE: Loose parts in crankcase
    • Risk of engine damage

    → Cover crankcase bores with a clean cloth.

  4. Cover crankcase bores behind the pistons with a clean cloth so that parts cannot fall into the crankcase.
  5. Remove piston-pin circlip on piston 1 on the inside (towards piston 2) using a small screwdriver.
    Fig 2: Locating Piston-Pin Circlip
    G09816367Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  6. Slide piston pin out with your hand. Carefully tap it out using a plastic or aluminum mandrel if necessary. Remove piston and place it on a clean surface.
  7. Continue to turn engine clockwise at the crankshaft pulley until piston 3 is at the top dead center.
  8. Remove piston-pin circlip on piston 3 on the inside (towards piston 2) using a small screwdriver.
  9. Slide piston pin out with your hand. Carefully tap it out using a plastic or aluminum mandrel if necessary. Remove piston and place it on a clean surface.
  10. Continue to turn engine clockwise at the crankshaft pulley until piston 2 is at the top dead center.
  11. Remove piston-pin circlip on piston 2 on any side using a small screwdriver.
  12. Slide piston pin out with your hand. Carefully tap it out using a plastic or aluminum mandrel if necessary. Remove piston and place it on a clean surface.
    Fig 3: View Of Piston Pins On Outer Pistons
    G09816368Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  13. Check piston and cylinder sleeve for signs of wear and damage.
  14. Tap cylinder sleeves out of the cylinder housing. To do this, insert the pressure piece of the pushing device 9660  at the base of the cylinder sleeve and drive the cylinder sleeve out with a plastic hammer.
    Fig 4: Driving Out Cylinder Sleeve
    G09816369Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  15. Remove O-rings from the cylinder housing and O-rings from the cylinder sleeves and dispose of them. Mark cylinder sleeves with a paint marker and assign them to the corresponding pistons.
  16. Complete the same steps to remove pistons for cylinder bank 4-6.
  17. To make the assembly marking (engraved letter -E-)  → Assembly marking on piston  visible on the piston crown, the combustion residues must be removed using an ultrasound bath or with a brass brush with solvent naphtha.
    Fig 5: Identifying Assembly Marking On Piston
    G09816370Courtesy of PORSCHE CARS NORTH AMERICA, INC.
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