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Checking exhaust system for leaks > < Renewing tailpipe

A4 Mk3

Stress-free alignment of exhaust system
Stress-free alignment of exhaust system
Procedure
l  The exhaust system must be aligned when it is cool.
l  Tightening torques → Chapter „Silencers - exploded view“
   
Vehicles without clamps between Y-pipe and rear silencer
–  Loosen bolt connections on front clamp.
–  Push exhaust system towards front of vehicle -arrow- so that rear mountings for rear silencers are preloaded by -a- = 5 ... 9 mm.
–  Tighten bolt connections on clamp evenly.
  A26-0101
Vehicles with clamps between Y-pipe and rear silencer
  Note
On a vehicle with clamps fitted between Y-pipe and rear silencer, it is also necessary to align the Y-pipe.
–  Loosen bolt connections on front and rear clamps.
–  Push front section of exhaust system towards front of vehicle -arrow-, so that mountings for Y-pipe are preloaded by -a- = 5 ... 9 mm.
–  Tighten bolt connections on front clamp evenly.
  A26-0101
–  Push rear section of exhaust system towards front of vehicle -arrow-, so that mountings (rear) for rear silencers are preloaded by -a- = 5 ... 9 mm.
–  Align rear silencers so they are horizontal.
–  Tighten bolt connections on rear clamps evenly.
  A26-0101
–  Check clearance between tailpipes and bumper on both sides:
l  Dimension -x- (left-side) = dimension -x- (right-side)
  A26-0471
If necessary, correct dimension -x- as follows:
–  Loosen connection -arrow- on strut between exhaust pipes.
–  Adjust the distance between the rear silencers.
  A26-10570

Checking exhaust system for leaks > < Renewing tailpipe