Classification Of Pistons And Connecting Rods

Information 

• For more information, see Porsche Spare Parts Information. 

Allocation of connecting-rod bearing shells:

The connecting-rod bearing classification sequence begins at connecting-rod bearings 1+4

The combination of bearing shells red/blue and blue/red have the same tolerance class as yellow/yellow.

1. Insert piston into the cylinder bore.
   1. 1.1 Remove connecting-rod bearing cap again.
   2. 1.2 Oil the cylinder wall.
   3. 1.3 Push piston -1-  into the cylinder bore from above by hand according to the marking using the > T40369 - funnel-2-  . -arrow- 

      The arrow on the piston crown must be facing the pulley side of the engine. The marking L or R next to the arrow indicates assignment to the left or right cylinder bank.

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      Fitting piston

2. Fit connecting rod and piston -3-  on the crankshaft.
   1. 2.1 Replace connecting-rod bearing shells and connecting-rod bearing cap screws -1-  .
   2. 2.2 Oil the running surfaces of the connecting-rod bearing shells.
   3. 2.3 Fit connecting rod on the crankshaft.
   4. 2.4 Fit connecting-rod bearing cap -2-  with new connecting-rod bearing shells on the connecting rod. Check that the retaining lugs are fitted correctly.
   5. 2.5 Oil new  connecting-rod bearing cap screws -1-  , fit them and tighten to > Initial tightening 50 Nm (37 ftlb.)  and > Final tightening + 90°  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Piston and connecting rod on crankshaft

3. Check the clearance of the oil spray jets.