Removing Pistons

Information 

• Connecting rod bolts and bearing shells must always be replaced. 
• Turn the crankshaft so that the crank pin of the piston to be removed stands vertically upwards. 

Information 

• Note the association between the connecting-rod big end and the connecting-rod bearing cap as the cracked connecting rods only fit in one position. 
• The retaining lugs of the connecting-rod bearing shells are always located on the same side in order to prevent the bearing shells from turning. 
• The connecting-rod bearing cap and the big end of the connecting-rod bearing have the same connecting-rod numbers. 

1. Remove oil return (oil plate) under the oil pump.
   Fig 1: Identifying Oil Return (Oil Plate) - 2WD

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Oil guide (oil plate)
   2. Oil return seal
   3. Screw, M6 x 20
   Fig 2: Identifying Oil Return (Oil Plate) - 4WD

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Oil guide (oil plate)
   2. Oil return seal
   3. Screw, M6 x 20
2. Loosen connecting rod bolts -6-  and take off connecting rod caps -5-  . Push piston in question out of the crankcase using a wooden rod. Hold the piston in your other hand or get another person to help. Fit connecting rod cap hand-tight to the connecting rod again using the old screws and set down after marking according to the relevant cylinder.

   The connecting rods are cracked and the connecting rod code is facing the exhaust side.

   The combustion chamber recess on the piston is facing the injector.

   Fig 3: Identifying Piston And Connecting Rod Components

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Remove the remaining pistons using the same procedure. To do this, turn the crankshaft using a wrench (a/f 27).