LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 2021 >> Macan S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (13 Engine - Crank Drive, Pistons 2.0L -- 95B - MACAN (95B)) >> WM, 131037 - Disassembling And Assembling Pistons (R4) >> Disassembling And Assembling Pistons >> Disassembling Pistons

Disassembling Pistons

WARNING: This page is about a different variant/trim than selected.
CAUTION: Engine damage due to improper handling of piston rings! 
  • Engine damage and strain, damage to piston rings 
    1. → Do not overstretch piston rings with the piston ring pliers. Only open up the piston rings until they just fit over the piston.
    2. → Do not use force to install pistons.

Information 

Information 

Pistons must not be marked using mechanical tools.

  1. Mark allocation of piston, connecting rod and cylinder for re-installation using a coloured marker.
  2. Removing piston pin circlip 1  .
    G15144708Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Piston pin circlip

    1. 2.1  Insert a suitable screwdriver behind the circlip 1  into the cut-out -Arrow-  .
    2. 2.2  Carefully lever piston pin circlip -1-  out of the groove and remove it.

      Make sure not to damage the pistons -2-  and piston pins -3-  .

    3. 2.3  Repeat the procedure on the opposite side.
  3. Remove connecting rod -1- 
    G15144709Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Connecting rod

    1. 3.1  Carefully drive out piston pin -2-  using VW222A - drift  .

      If the piston pin -2-  is stiff, heat the piston -3-  to around 60°C (140°F).

    2. 3.2  Remove piston pin -2-  and connecting rod -1-  from the piston -3-  .

    Information 

    The holding arms of the piston ring pliers should clasp the compression ring from above.

  4. Removing compression rings -1 and 2-  .
    G15144710Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Compression rings

    1. 4.1  Place the piston on a clean surface and look for the gaps -Arrows-  in the compression rings -1 and 2-  .
    2. 4.2  Position piston ring pliers in the gap in the upper compression ring -1-  carefully spread it out and remove it by pulling it upwards.
    3. 4.3  Loosen the piston ring pliers and remove the compression ring -1-  from the piston pliers.
    4. 4.4  Repeat the procedure for the lower compression ring -2-  .
  5. Removing oil scraper ring -1-  .
    G15144711Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Oil scraper ring

    1. 5.1  Removing upper and lower discs.
      1. 5.1.1  Look for gaps in the oil scraper ring -1-  .
      2. 5.1.2  Fit piston ring pliers in the gap on the upper disc, carefully spread it out and remove it by pulling it upwards.
      3. 5.1.3  Release the piston ring pliers and remove upper disc from the piston ring pliers.
      4. 5.1.4  Repeat the procedure for the lower disc.
    2. 5.2  Open spring at the connection point -Arrow-  and remove it.
scientia non olet · About LEMON Manuals