Disassembling Crankshaft

NOTIFICATION 

Dirt and contamination 

• Risk of damage to units or components 
  • → Protect components from dirt and contamination.
  • → Clean or replace dirty components.

Crankshaft main bearing shells: 

Fig 1: Crankshaft Bearing Shells Components Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Allocation of crankshaft bearing shells

1. Main bearing - smooth bearing
2. Main bearing - partial-groove bearing
3. Thrust washers
4. Supporting mount

Overview of components - connecting rods/pistons: 

Fig 2: 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. Piston
5. Piston-pin circlip
6. Piston pin
7. Connecting rod
8. Bearing shells - in red, yellow or blue
9. Connecting rod bolts - always replace 

1. Fit special tool > P209a - retainer plate  on the crankshaft flange (flywheel side) using two flywheel screws.
   CAUTION: Fine thread!
   1. 1.1 Clamp crankshaft -1-  with retainer plate -2-  in a vice.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Crankshaft with retainer plate (view of 6-cylinder crankshaft)

2. Loosen and unscrew connecting rod bolts for connecting rods for cylinders 1-2 using a multiple-tooth socket-wrench insert.
   1. 2.1 Remove connecting rod cap and connecting rod, remove bearing shells and store the parts together.
   2. 2.2 Replace connecting rod bolts.
3. Clean the crankshaft and connecting rods.