Audi Workshop Service and Repair Manuals

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

Exhaust system without clamp between centre silencer and rear silencer - vehicles with front-wheel drive –  Loosen bolt connections of front clamp → Item. –  Push exhaust system towards front of vehicle -arrow- so that rear mounting for rear silencer is preloaded by -a- = 7 ... 11 mm. –  Tighten bolts for front clamp → Item evenly to 23 Nm (M8) or 40 Nm (M10). –  Align tailpipes → Anchor.

Exhaust system with clamp between centre silencer and rear silencer - vehicles with front-wheel drive   Note On vehicles with clamp fitted between centre silencer and rear silencer, it is also necessary to align the centre silencer. –  Loosen bolts for front clamp → Item and rear clamp → Item. –  Push front section of exhaust system towards front of vehicle -arrow-, so that rubber mounting (right-side) for centre silencer is preloaded by -a- = 5 ... 9 mm. –  Tighten bolts for front clamp → Item evenly to 23 Nm (M8) or 40 Nm (M10).

–  Push rear section of exhaust system towards front of vehicle -arrow- until rear mounting for rear silencer is preloaded by -a- = 7 ... 11 mm. –  Align rear silencer so it is horizontal. –  Tighten bolts for rear clamp → Item evenly to 23 Nm (M8) or 40 Nm (M10). –  Align tailpipes → Anchor.

Aligning tailpipes - vehicles with front-wheel drive –  Check clearance between tailpipes and bumper: l  Distance -a- is the same on both sides. l  Dimension -b- = 22 ... 28 mm. –  If necessary, loosen mounting for rear silencer to adjust the tailpipes.

Exhaust system without clamps between centre silencer and rear silencer - vehicles with four-wheel drive –  Loosen bolt connections of front clamp → Item. –  Push exhaust system towards front of vehicle -arrow- so that rear mountings for rear silencers are preloaded by -a- = 7 ... 11 mm. –  Tighten bolts for front clamp → Item evenly to 23 Nm (M8) or 40 Nm (M10). –  Align tailpipes → Anchor.

Exhaust system with clamps between centre silencer and rear silencer - vehicles with four-wheel drive   Note On vehicles with clamps fitted between centre silencer and rear silencers, it is also necessary to align the rear silencer. –  Loosen bolts for front clamp → Item and rear clamps → Item. –  Push front section of exhaust system towards front of vehicle -arrow-, so that rubber mounting (right-side) for centre silencer is preloaded by -a- = 5 ... 9 mm. –  Tighten bolts for front clamp → Item evenly to 23 Nm (M8) or 40 Nm (M10).

–  Push rear section of exhaust system towards front of vehicle -arrow-, so that mountings (rear) for rear silencers are preloaded by -a- = 7 ... 11 mm. –  Align rear silencers so they are horizontal. –  Tighten bolts for rear clamps → Item evenly to 23 Nm (M8) or 40 Nm (M10). –  Align tailpipes → Anchor.

Aligning tailpipes - vehicles with four-wheel drive –  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 clearance -y- between tailpipes and bumper: l  Dimension -y- = 34 ... 42 mm.   Note Disregard distance -z-. –  If necessary, check whether the exhaust system is aligned free of stress.