Volkswagen Workshop Service and Repair Manuals

Removing and installing high-pressure accumulator (rail) Special tools and workshop equipment required

t  Engine bung set -VAS 6122- Removing   WARNING t  Read rules for cleanliness and the instructions for working on the fuel system → Chapter. t  Always follow these rules for cleanliness and instructions before starting work and while working on the fuel system. –  Remove engine cover panel → Chapter.

–  Disconnect electrical connector -arrow- on fuel pressure regulating valve -N276-.

–  Disconnect electrical connector -B- on fuel pressure sender -G247-. –  Pull vacuum hose -A- from cylinder head cover.

–  Remove fuel return hose from high-pressure accumulator (rail); release hose clip -arrow- to do so.

–  Open retaining clips -arrows- of wiring harness and pull electrical connectors off at glow pin plugs.

–  Unscrew bolt -2- and union nuts -1 and 3-, and remove high-pressure line.

–  Unscrew bolts -2-, lay coolant return line aside.

–  Unscrew bolts -arrows-, lay coolant return line aside. –  Remove line guide from high-pressure accumulator (rail) and place to one side.

–  Undo union nuts of 4 high-pressure lines -1-. –  Place the removed high-pressure lines on a clean cloth.

–  Remove high-pressure accumulator (rail) by unscrewing the two bolts -arrows-. Installing Installation is carried out in the reverse order; note the following: l  Specified torques → Chapter „Assembly overview - injectors“. –  Install high-pressure lines (free of tension) → Chapter.   Note t  Observe cylinder specific markings when reusing high-pressure lines. t  The high-pressure lines may be re-used after the following checks: t  Check taper seat of respective high-pressure line for deformation and cracks. t  The line hole must not be deformed, constricted or damaged. t  Corroded lines should no longer be used.