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Checking exhaust system for leaks > < Removing and installing front exhaust pipe with catalytic converter

A4 Cabriolet Mk2

Stress-free alignment of exhaust system
Stress-free alignment of exhaust system
l  The exhaust system must be aligned when it is cool.
Vehicles without clamp between centre silencer and rear silencer
–  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 evenly to 23 Nm (M8) or 40 Nm (M10).
–  Align tailpipes → Anchor.
Vehicles with clamp between centre silencer and rear silencer
  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.
  A26-0098
–  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 evenly to 23 Nm (M8) or 40 Nm (M10).
  A26-0199
–  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 evenly to 23 Nm (M8) or 40 Nm (M10).
–  Align tailpipes → Anchor.
  A26-0098
Aligning tailpipes
–  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.
  A26-0533

Checking exhaust system for leaks > < Removing and installing front exhaust pipe with catalytic converter