High Pressure Lines, Installing: Procedure

WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, 2010 Audi S5, 2009 Audi S5, and 2008 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Do Not Change The Angles Of The Fuel Lines.

High pressure line connections must not show any signs of damage.

Never bend any of the fuel line mounting clamps.

If a mounting clamp was bent, or if the fuel line is being replaced, then the mounting clamps must also be replaced.

-- Coat the threads on the union nut with fuel.

-- Tighten the high pressure line union nuts by hand, making sure they are seated without tension.

-- Use a Torque Wrench:V.A.G 1331 with the 14 mm Socket, Open Ring:V.A.G 1331/8 to tighten the high pressure lines.

Fig 1: Fastening High-Pressure Line At Fuel Rail Using Torque Wrench V.A.G 1331 With Open End Wrench Socket V.A.G 1331/8

Courtesy of AUDI OF AMERICA, LLC

-- Use a Torque Wrench:V.A.G 1331 with 17 mm Socket:V.A.G 1331/6 to tighten the high pressure lines.

Fig 2: Identifying SW 17 Union Nut At Fuel Rail, Torque Wrench V.A.G 1331 And SW 17 Socket V.A.G 1331/6

Courtesy of AUDI OF AMERICA, LLC

Tightening Specification: 25 Nm

-- Tighten the clamps only after the high pressure lines are tightened.

-- Perform a leak test on the fuel system.