Classification Of Pistons And Connecting Rods

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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.

Connecting-rod bearing	Permitted colour combinations of bearing shells
top/connecting rod	Yellow	Red	Blue
bottom/connecting rod cap	Yellow	Blue	Red

Insert piston into the cylinder bore.

1.1 Remove connecting-rod bearing cap again.
1.2 Oil the cylinder wall.

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

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
Check the clearance of the oil spray jets.