Audi Workshop Service and Repair Manuals

Stress-free alignment of exhaust system l  The exhaust system must be aligned when it is cool.

Vehicles without clamps between centre silencer and rear silencer –  Loosen bolts for clamps → Item. –  Push exhaust system towards front of vehicle -arrow- so that rubber mountings (right-side) for centre silencer are preloaded by dimension -a- = 5 ... 9 mm. –  Tighten bolts on clamps evenly to 23 Nm. –  Align tailpipes → Anchor.

Vehicles with clamps between centre silencer and rear silencer   Note On vehicles with clamps fitted between centre silencer and rear silencer, it is also necessary to align the centre silencer. –  Loosen bolts on clamps → Item and → Item. –  Push front section of exhaust system towards front of vehicle -arrow- so that rubber mountings for centre silencer are preloaded by dimension -a- = 5 ... 9 mm. –  Tighten bolts on front clamps → Item evenly to 23 Nm.

–  Push rear section of exhaust system towards front of vehicle -arrow-, so that rear rubber mountings for rear silencer are preloaded by dimension -a- = 7 ... 11 mm. –  Align rear silencers horizontally. –  Tighten bolts on rear clamps → Item evenly to 23 Nm. –  Align tailpipes → .

Aligning tailpipes –  Check clearance between tailpipes and bumper on both sides. l  Distance -a- is the same on both sides. l  Ignore distance -b-.

If necessary, correct dimension “a” as follows: –  Loosen bolts -arrows- on brace between exhaust pipes. –  Adjust the distance between the rear silencers. –  Tighten bolts to 23 Nm.

–  Check distances -y- and -z- between tailpipes and bumper. l  Distance -y- = 15 mm. l  Distance -z- = 20 ... 26 mm. –  If necessary, check whether the exhaust system is aligned free of stress → Chapter.