Audi Workshop Service and Repair Manuals

Stress-free alignment of exhaust system   Note 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 for centre silencer are preloaded by dimension -a- = 5 ... 9 mm. –  Tighten bolts on clamps uniformly to 40 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 40 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 40 Nm. –  Align tailpipes → .

Aligning tailpipes –  Check distance between left and right-side tailpipes and bumper. l  Dimension -x- (left-side) = dimension -x- (right-side)

If necessary, correct dimension x as follows: –  Loosen nuts -arrows- on brace between exhaust pipes. –  Adjust the distance between the rear silencers. –  Tighten nut to 25 Nm.

–  Check distances -y- and -z- between tailpipes and bumper. l  Dimension -y- = above 20 mm. l  Dimension -z- = 10 ... 16 mm. –  If necessary, check whether the exhaust system is aligned free of stress → Chapter.