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 bolt connections on front clamps.

–  Push exhaust system towards front of vehicle -arrow- so that rubber mountings for centre silencer are preloaded by -a- = 5 ... 9 mm. –  Tighten bolt connections of 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 bolt connections on front and rear clamps.

–  Push front section of exhaust system towards front of vehicle -arrow-, so that mountings for centre silencer are preloaded by -a- = 5 ... 9 mm. –  Tighten bolt connections of front clamps evenly to 23 Nm. –  Push rear section of exhaust system towards front of vehicle -arrow- so that rubber mountings for centre silencer are preloaded by -a- = 5 ... 9 mm.

–  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 so they are horizontal. –  Tighten bolt connections of rear clamps evenly to 23 Nm. –  Align tailpipes → Anchor. Aligning tailpipes

–  Check clearance between tailpipes and bumper on both sides. l  Dimension -x- (left-side) = dimension -x- (right-side)

If necessary, correct dimension “x” as follows: –  Slacken bolt connection -arrow- on brace between exhaust pipes. –  Adjust the distance between the rear silencers. –  Tighten bolt connection to 23 Nm.

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