Removing Fuel Distribution Pipe (Fuel Rail)

→ Ventilate the work area well.

→ Never ingest or inhale.

→ Read specific information on the Hazard Sheet.

→ Wear personal protective gear.

→ Do not smoke, eat or drink in the work area.

→ Avoid contact with hot parts or sources of ignition.

→ Use suction to remove ignitable vapours.

→ Attach warning sign in a clearly visible position.

→ Thoroughly clean connection points and adjacent areas before loosening them. If the engine is very dirty, wash it before starting disassembly work.

→ Lay removed parts on a clean surface and cover them. Do not use fibre-shedding cloths.

→ Carefully cover components or seal them if repair work will not be carried out immediately. Place rubber caps on connections. Seal intake openings with film or adhesive tape.

→ Only install clean parts. Do not take spare parts out of the packaging until just before installation.

→ Never use compressed air when the system is open. Do not move the vehicle.

→ Perform leak test.

Information 

• Do not bend high-pressure lines. Always remove the high-pressure distributor pipe and other fuel-supply components in the high-pressure area completely. Check that the connection points are not damaged and are perfectly clean and make sure there is no thread damage. Fit union nuts on all connection points by hand before screwing in screws or bolts. Remove dirt on the conical/ball joints. Check connection points for leaks following fitting. 

Information 

• The ignition must be switched off when working on the fuel system. 
• Absorb any escaping fuel using a suitable binding material or a cloth. 
• Cloths which have absorbed fuel must be disposed of according to the applicable national laws. 
• The fuel system must be depressurised before starting work on it. 
• Only work on the fuel system in well-ventilated rooms. 
• Any seals which have been removed must always be replaced. 

Cylinders 1, 3 and 5

1. Disconnect fuel low-pressure line at the transfer point on the plenum panel or directly on the fuel rail. Counter while loosening the line. -1- 
   Fig 1: Identifying Cylinders Fuel Rail (1, 3 And 5)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Remove four screws on fuel rail for cylinders 1, 3 and 5 -2-  . Hold fuel rail with both hands and pull out by joggling it. Make sure not to pull the injectors out of the cylinder head. If the injectors slip out of the cylinder head accidentally, the Teflon sealing rings must be replaced. → Information 
3. Replace the sealing rings between the injectors and the fuel rail.

   Cylinders 2, 4 and 6

4. Remove intake-air distributor. The lower fuel distribution pipe (fuel rail for cylinders 2, 4 and 6) must be removed during disassembly. → Removing Intake-Air Distributor 
5. Replace the sealing rings between the injectors and the fuel rail.