Tightening Sequence For High-Pressure Fuel Lines

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Fig 1: Fuel Collection Pipe Screws Tightening Sequence - V8 Turbo

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Tightening sequence for fuel collection pipe - V8 Turbo

1-10	Tightening sequence for fuel collection pipe

Tightening sequence for high-pressure pump and lines:

Fit union nut -1- by hand.
1. 1.1 Coat thread on union nuts with Microgleit DF 977S. Leave to dry off for at least 5 minutes before fitting.
Screw high-pressure pump -2- into position.
Fit union nut -3- by hand.
1. 3.1 Coat thread on union nuts with Microgleit DF 977S. Leave to dry off for at least 5 minutes before fitting.
Fit screws -4- for the high-pressure pump.
Fit screw -5- with holder by hand.
Press down the high-pressure pump and tighten screws -4- .
> Tightening torque 12 Nm (9 ftlb.)
Tighten screw -5- .
> Tightening torque 9 Nm (6.5 ftlb.)
Tighten union nuts -1- and -3- .
> Initial tightening 8 Nm (6 ftlb.)

> Final tightening + 50°

Fig 2: High-Pressure Lines Screws Tightening Sequence

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Tightening sequence for high-pressure lines