Audi Workshop Service and Repair Manuals

Installing high-pressure pipes Special tools and workshop equipment required

t  Torque wrench -V.A.G 1331-

t  Ratchet -V.A.G 1331/1-

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

t  Socket -T40055-

t  Support sleeve -T10411- Procedure   Note t  Note identification marks for cylinder allocation when re-installing high-pressure pipes. t  The high-pressure pipes can be re-used after performing the following checks: t  Check taper seats of high-pressure pipes for deformation and cracks. t  The bore of the pipe must not be distorted, restricted or otherwise damaged. t  Corroded pipes must not be used again. –  Use vacuum cleaner to remove dirt from taper seat at fuel rail. –  Clean fuel pipe and end of pipe using cleaning solution and dry with compressed air. –  Lubricate threads of union nuts with fuel. –  Initially hand-tighten union nuts on high-pressure pipes (ensure that pipes are not under tension). –  Tighten high-pressure pipes between injectors and fuel rail first at injector and then at fuel rail.

–  To install high-pressure pipe between high-pressure pump and fuel rail, slide support sleeve -T10411- onto fuel pressure sender -G247-.   Note t  To position union nut on high-pressure pump, it must be possible to move bracket (for engine lifting eye); for this, loosen bolts -4-.

t  Support sleeve -T10411- gives correct distance between fuel pressure sender -G247- and high-pressure pipe.

–  Tighten high-pressure pipe -2- between high-pressure pump and fuel rail first at high-pressure pump -4- and then at fuel rail -1-. –  Tighten bolt -3- for bracket for high-pressure fuel pipe. –  Secure bracket (for engine lifting eye). t  Tightening torques: refer to exploded view of fuel system → Chapter. –  Check fuel system for leaks → Chapter.