Component Overview And Line Routing

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: Identifying Fuel Line Routing On Underbody

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Remove lids for the two fuel tank flanges.
1. 1.1. To do this, cut out the carpeted floor at the perforation using a carpet knife and fold it over.
2. 1.2. Then unscrew the M6 fastening nuts -arrows- and remove the lids.
  
  Fig 2: Locating Fastening Nuts On Caps
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect the fuel pressure line (supply) -1- at the flange.
1. 2.1. Press the two release buttons at the same time and pull the rapid-action coupling up and off.
  
  Fig 3: Locating Fuel Supply And Connection Points Without Auxiliary Heating
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  
  Fig 4: Locating Tank Flange With Connection For Auxiliary Heating
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect fuel lines at the connection points in the engine compartment.
1. 3.1. Pull off plastic cover -1- .
2. 3.2. Loosen the screw-in sleeve (wrench size 17) on the pressure line -2- and counter at the hexagon (wrench size 19) on the connecting line at the same time.
3. 3.3. Disconnect line for tank ventilation -3- .
4. 3.4. Pull off the line for the leakage diagnosis pump if necessary -4- .
5. 3.5. Open the line bracket at the bulkhead.
  
  Fig 5: Identifying Fuel Line Connection Points In Engine Compartment
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove heat shields -1- .
1. 4.1. Unscrew three M6 collar nuts -3- and one M6 screw -1- and remove the heat shields.
  
  Fig 6: Identifying Heat Shields Mounting Screw
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove heat shield -1- on cardan shaft.
1. 5.1. Unscrew two M6 screws -2- and one M8 collar nut -3- and remove the heat shield.
  
  Fig 7: Identifying Cardan Shaft Heat Shield Mounting Screw
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Lower the fuel tank.
1. 6.1. Place a transmission jack (e.g. transmission jack V.A.G 1383 A WE 1082 ) in position to support and secure the fuel tank.
2. 6.2. Unscrew fastening screws for the restraining straps and carefully lower the fuel tank.
  → 201019 REMOVING AND INSTALLING FUEL TANK ON DFI ENGINES .
Open all line brackets on the underbody and remove the wire harness.