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Home >> Porsche >> 2012 >> Panamera S >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 13 - Engine - CRANKGEAR, Pistons 4.8L Turbo -- 970 - PANAMERA (970) >> WM, 131020 Removing And Installing Pistons >> Information >> Component Overview

Component Overview

Fig 1: Piston, Connecting Rod Components Location
G15197911Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Piston, connecting rod

1  Piston-ring set; oil with engine oil; TOP marking facing upwards; oil scraper ring down; ring gaps offset by 120°
2  Piston; different on naturally aspirated and turbo engines; combustion chamber recess facing centre of engine; left and right different; arrow in direction of travel
3  Piston-pin circlip (positioned at 6 o'clock or 11 o'clock)
4  Piston pin; oil
5  Connecting rod
6  Connecting rod bolt; replace as it must be tightened in the plastic area; oil screw
7  Connecting rod bearing shells; oil with engine oil
Fig 2: Connecting-Rod Assembly, Bearing Shells Components Location
G15197912Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Connecting-rod assembly, bearing shells

A  View A (identification area for connecting-rod number; fit connecting rod with identification area facing exhaust side; marking on rod and lid must be on the same side)
B  View B (fit bearing shells flush and press in by hand)
C  View C (fit bearing shells flush and press in by hand)
Fig 3: Piston Classification, Naturally Aspirated Engine Components Location
G15197913Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Piston classification, naturally aspirated engine

1  Marking for dimension group (just one permitted per engine, in this case x)
2  Porsche short numeric code without main or middle number
3  Short numeric code (supplier)
4  Marking area for weight group (just one permitted per engine, + or -)
5  Cylinder bank identification (V6 1-3 and 4-6) (V8 1-4 and 5-8)
6  Barcode 128 (short numeric code without main group or weight group)
7  Arrow marking in direction of travel
8  Identification for dimension group
9  Arrow marking in direction of travel
10  Inspection stamp (supplier)
Fig 4: Piston Classification, Turbo Engine Components Location
G15197914Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Piston classification, turbo engine

1  Arrow marking in direction of travel
2  Porsche short numeric code without main or middle number
3  Short numeric code (supplier)
4  Cylinder bank identification (V8 1-4 and 5-8)
5  Marking area for weight group (just one permitted per engine, + or -)
6  Barcode 128 (short numeric code without main group or weight group)
7  Arrow marking in direction of travel
8  Marking for dimension group (just one permitted per engine, in this case x)
9  Marking area for weight group (just one permitted per engine, + or -)
10  Inspection stamp (supplier)
Fig 5: Crankshaft Components Location
G15197915Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Crankshaft

1  Crankshaft
2  Straight pin, 6x20
3  Spring, 5 x 6.5
4  Thrust washer (grooves facing out)
5  Main bearing shell, upper
6  Main bearing shell, lower
7  Shaft sealing ring => Do not touch sealing ring lip! Clean crankshaft flange and oil lightly
8  View of crankshaft flange
9  Allocation of main bearing
10  Allocation of connecting-rod bearing
A  Direction of travel (main bearing 1 is the first in direction of travel against output)
B  Bearing shell with blue colour marking
G  Bearing shell with yellow colour marking
N  Bearing shell with green colour marking
R  Bearing shell with red colour marking