Audi Workshop Service and Repair Manuals

Removing and installing high-pressure pipe Special tools and workshop equipment required

t  Torque wrench -V.A.G 1331-

t  Open end spanner insert, AF 17 -V.A.G 1331/6-

t  Puller -T10055- Removing   WARNING The fuel system operates at extremely high pressure. This can cause injury. The fuel pressure in the high-pressure section of the injection system must be reduced to a residual pressure prior to opening the system. –  Reduce fuel pressure in high-pressure section of injection system → Chapter. –  Remove intake manifold (top section) → Chapter.

–  Remove bolts -arrows-. –  Unplug electrical connector -6- for Hall sender 3 -G300-. –  Release electrical connectors and unplug connectors from ignition coils -1 ... 5- simultaneously. –  Disengage electrical wiring harness and move clear to left side.

–  Unplug electrical connector -1- at exhaust camshaft control valve 1 -N318-.   Note Disregard -arrow-.

–  Remove bolts -arrows- and union nut -4-. –  Release hose clip -2- and detach fuel hose. –  Detach fuel supply line. –  Remove union nuts -1- and -3- and detach high-pressure pipe.   Note Do not attempt to bend high-pressure pipe to a different shape. Installing   Note t  The connections of the high-pressure pipe must not be damaged. t  Do not attempt to bend high-pressure pipe to a different shape.

–  First tighten union nut by hand until it makes contact, making sure that high-pressure pipe is not under tension. –  Tighten union nut with torque wrench -V.A.G 1331- and 17 mm tool insert -V.A.G 1331/6-; to do so, counterhold at hexagon flats of threaded connection with an open-end spanner. l  Tightening torques → Chapter „High-pressure pump - exploded view“ and → Chapter „Intake manifold (bottom section), fuel rail and injectors - exploded view“ –  Do not tighten bolt for retainer until high-pressure pipe has been tightened. –  Install intake manifold (top section) → Chapter.