Fuel Supply Line: Service and Repair

High Pressure Lines

Special tools, testers and auxiliary items required

• Torque Wrench (V.A.G 1331)

• Ring spanner insert (V.A.G 1331/2)

• Tighten union nut on the fuel high pressure pump, see => [ High pressure line, installing ] High Pressure Pump Overview

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

• Do not bend the high pressure lines to a different angle.

• 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 threads on the union nut with fuel.

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

- Use torque wrench (V.A.G 1331) with the open end wrench socket (V.A.G 1331/2) to tighten the high pressure line on the fuel rail.

• Tightening Specifications High pressure line union nut: 25 Nm

- Only install the retaining tabs after tightening the high pressure lines.

- Check fuel system for leaks.