Procedure

WARNING: This page is about a different car, the 2012 Volkswagen Touareg and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

When using the high pressure line again, pay attention to the cylinder marking.

The high pressure lines can be reused only after the following checks:

Check the sealing cone on each high pressure line for deformation and cracks.

The bores for the lines must not be deformed, narrowed or damaged.

Do not use corroded lines again.

-- Remove any dirt from the sealing cone on the rail.

-- Clean the fuel line and line connection with detergent and dry it with compressed air.

-- 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.

Tightening specifications 28 Nm

-- To tighten the high pressure lines, use the following tools depending on the width across flats:

Tightening the High Pressure Lines on the High Pressure Reservoir with a 14 mm Wrench.

Fig 1: Fastening High-Pressure Line (14 mm) At High Pressure Pump Use Torque Wrench V.A.G 1331 With Ratchet V.A.G 1331/1 And Socket 14 mm 3150

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Tightening the High Pressure Lines on the High Pressure Reservoir with a 17 mm Wrench.

Fig 2: Fastening High-Pressure Line At High Pressure Pump Using Torque Wrench V.A.G 1331 With Ratchet V.A.G 1331/1 And Socket 17 Mm T40055

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Tightening the High Pressure Lines on the High Pressure Reservoir with a 19 mm Wrench.

Fig 3: Identifying High Pressure Line To Fuel Rail And 19 mm Wrench

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Perform a leak test on the fuel system. Refer to FUEL SYSTEM, CHECKING FOR LEAKS .