Assembly Overview - Pistons

Connecting rod/piston: 

Fig 1: Piston/Connecting Rod Components Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Piston/connecting rod

1. Plain compression ring - groove 1
2. Stepped taper-faced ring - groove 2
3. Oil scraper ring - groove 3
4. Pistons
5. Piston-pin circlip
6. Piston pin
7. Connecting rod
8. Bearing shells - in red, yellow or blue
9. Connecting rod bolts - always replace  > Initial tightening 5 Nm (3.5 ftlb.)  > Subsequent tightening torque 16 Nm (12 ftlb.)  > Tightening torque 20 Nm (15 ftlb.)  > Tightening angle 80°  > Loosen screws - 360°  > Initial tightening 5 Nm (3.5 ftlb.)  > Subsequent tightening torque 16 Nm (12 ftlb.)  > Tightening torque 20 Nm (15 ftlb.)  > Final tightening angle 80° +/- 3°