High-Pressure Pump, Fuel Lines, Sensors

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Overview of high-pressure pump, fuel lines

Fig 1: Fuel System On High-Pressure Side Components Location With Torque Specification

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Component overview of fuel system on high-pressure side

1	High-pressure pump -1-
2	O-ring on high-pressure pump -2- - replace O-ring!
3	Screws on high-pressure pump -3- - replace screws > Tightening torque 13 Nm (9.5 ftlb.)
4	Low-pressure fuel line -4-
5	Holder for fuel lines -5-
6	M6 screws for holder for fuel lines -6- > Tightening torque 13 Nm (9.5 ftlb.)
7	Fuel collection pipe, bank 4-6 -7-
8	Screws, M8 x 80 -8- > Initial tightening 10 Nm (7.5 ftlb.) > Initial tightening 10 Nm (7.5 ftlb.) > Final tightening torque angle 90° V > Loosening and initial tightening 10 Nm (7.5 ftlb.) > Final tightening torque angle 90°
9	Fuel collection pipe, bank 1-3 -9-
10	Low-pressure line -10-
11	Union nuts on fuel lines (a/f 17) -11- > Initial tightening 8 Nm (6 ftlb.) > Final tightening torque angle + 50° + 10°
12	Low-pressure sensor -12- > Tightening torque 25 Nm (19 ftlb.)
13	High-pressure sensor for cylinder bank 4-6 -13- - Always counter at the mount when tightening! > Tightening torque 37.5 Nm (27.5 ftlb.) +/- 2 Nm (1.5 ftlb.)
14	High-pressure sensor for cylinder bank 1-3 -14- - Always counter at the mount when tightening! > Tightening torque 37.5 Nm (27.5 ftlb.) +/- 2 Nm (1.5 ftlb.)

Location	Description	Type	Basic value	Tolerance
Screw securing low-pressure line to crankcase	Item 3	Tightening torque	32 Nm (24 ftlb.)
Courtesy of PORSCHE CARS NORTH AMERICA, INC. Low-pressure fuel line (lower section)