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Home >> Porsche >> 2016 >> Cayman GTS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (13 - Engine - CRANKGEAR, Pistons) >> WM 131020 Removing And Installing Pistons On 4.8-Litre DFI Engines (Cayenne Tip, Cayenne Man, Cayenne Diesel) >> Information >> Component Overview

Component Overview

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Overview Of Piston And Connecting Rod
G09409064Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Piston-ring set; oil with engine oil; TOP marking facing upwards; oil scraper ring down
  2. Piston; different on naturally aspirated and turbo engines; combustion chamber recess facing centre of engine; left and right different; direction of travel 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 bolt → Tightening torque: 8 Nm (6 ft lbs.)+2 Nm (+1.5 ft lbs.)  → Tightening torque: 20 Nm (15 ft lbs.)  → Tightening torque: 40 Nm (30 ft lbs.)  → Torque angle: 90° 
  7. Connecting rod bearing shells; oil with engine oil
Fig 2: Locating Oil Applying Area On Connecting-Rod Assembly And Bearing Shells
G09409065Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. View A (identification area for connecting-rod number; fit connecting rod with identification area facing exhaust side; markings on rod and cap must be on the same side)
  2. View B (fit bearing shells flush and press in by hand)
  3. View C (fit bearing shells flush and press in by hand)
    Fig 3: Identifying Piston Classification
    G09409066Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Inspection stamp (supplier)
  2. Arrow marking in direction of travel
  3. Porsche short numeric code without main or middle number
  4. Cylinder bank identification
  5. Marking area for weight group
  6. Marking area for dimension group
  7. Barcode 128 (short numeric code (without main group) and weight group)
  8. Direction of travel arrow
  9. Short numeric code (supplier)
Fig 4: Exploded View Of Crankshaft
G09409067Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Crankshaft
  2. Straight pin, 6 x 20
  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. Crankshaft bearing classification (example: GGGGG-BBBB; 5 main shaft bearings with yellow marking, 4 double (8) connecting rod bearings with blue marking) => For numbering, see A 
  1. Direction of travel (main bearing 1 is the first in direction of travel against output)
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