Fuel Supply Line: Service and Repair

High Pressure Line

Special tools, testers and auxiliary items required

• Torque Wrench 5-50 Nm (V.A.G 1331)

• Tool Insert, AF 17 (V.A.G 1331/6)

Removing

There is a risk of injury because the fuel is under very high pressure.

• Reduce the fuel pressure down to residual pressure before opening the high pressure area of the fuel injection system.

- Reduce fuel pressure in high pressure area. Refer to => [ Releasing Pressure in High Pressure Area ] Releasing Pressure In High Pressure Area.

- Remove the supercharger.

- Remove the front secondary air hose - arrow - from its bracket and disconnect it; to do this, press the release buttons.






- Remove the bolts - arrows - and move the intake manifold runner position sensor (G336) and the intake flap vacuum actuator to the side.






• Ignore - 1 -.

• Cylinder bank 2 (left) is shown in the illustration.

- Remove the bolts - arrows - and threaded connection - 1 -.






- Remove the union nuts - 2 and 3 - while counter holding the threaded connection.

• Do not change the bent shape of the high pressure line.

Installing

• Tightening specifications: High pressure pump assembly overview, refer to => [ High Pressure Pump Overview ] High Pressure Pump Overview

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

• Do not change the bent shape of the high pressure line.

- First tighten the union nut by hand making sure that it contact the high pressure line free-of-stress.






- Counter hold the fuel rail using an open-end wrench on the threaded connection and tighten the union nut using a (V.A.G 1331) and a (V.A.G 1331/6).

- First tighten the bolt of the retaining strap, after that, the high pressure line is tightened.

- Install the supercharger.