Disassembling Pistons/connecting Rods, Cylinder 1-3

Information 

When removing pistons, the piston-pin circlip always remains in the piston, which is installed opposite the large assembly bore (no chamfer) for the piston pin.

1. Remove piston/connecting rod unit. To do this, clamp the connecting rod to a vice with aluminum jaws, for example.
   NOTE: Incorrect handling of piston rings

   • Risk of strain and damage to piston rings

   → Only open up the piston ring using the piston ring pliers sufficiently to allow you to remove or fit it.

   → Do not use force to install pistons.

2. Remove piston ring groove 1 and groove 2 separately using piston ring pliers size 1 Nr.58  . Remove piston ring groove 1 first. The piston rings must not be overstretched.
   Fig 1: Removing Piston Rings

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. The three-piece oil scraper ring can be removed by hand. First, carefully remove both rings, then remove the springs.
4. Insert piston/connecting rod unit into the retaining device 9597  in such a way that the twist lock in the second piston ring groove faces the observer.
   Fig 2: Identifying Piston Assembly Device 9597

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Carefully press out piston-pin circlip with a screwdriver; while doing so, place a cloth over the piston so that the circlip does not pop out.
   Fig 3: Removing Piston Pin Circlip

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
6. Turn piston/connecting rod unit through 180° on the assembly device and press out piston pin with the plunger special tool assembly tool 9500  .
   Fig 4: Pressing Out Piston Pin

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
7. Repeat steps for removing pistons/connecting rods on cylinders 2 and 3.