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Removing and installing exhaust manifold (right-side) > < Exhaust manifold - exploded view

A4 Cabriolet Mk2

Removing and installing exhaust manifold (left-side)
Removing and installing exhaust manifold (left-side)
   
Removing
–  Remove starter catalytic converter: vehicles without particulate filter → Chapter; vehicles with particulate filter → Chapter.
–  Unplug electrical connector -4-.
–  Detach air hose -5-.
–  Remove bolts -1 … 3- and detach throttle valve module -J338- from intake connecting pipe.
  A15-10119
–  Cover opening -arrow- in gearbox to prevent small parts from dropping in.
–  Unscrew bolts -1- and -2- and detach oil return line.
  Note
Shown in illustration with engine removed and intermediate pipe detached.
  A21-0346
–  Unscrew nuts and bolts -arrows- and detach intermediate pipe.
  A26-10034
–  Unbolt exhaust manifold -arrows-.
Installing
Installation is carried out in the reverse order; note the following:
  Note
t  Renew gaskets, O-rings and self-locking nuts.
t  Hose connections and hoses for charge air system must be free of oil and grease before assembly.
t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue.
t  To ensure that the charge air hoses can be properly secured at their connections, spray rust remover onto the worm thread of used hose clips before installing.
–  Install starter catalytic converter: vehicles without particulate filter → Chapter, vehicles with particulate filter → Chapter.
–  Align exhaust system so it is free of stress: vehicles without particulate filter → Chapter, vehicles with particulate filter → Chapter.
Tightening torques
  A26-10035
ComponentNm
Exhaust manifold to cylinder head25 1)2)
Intermediate pipe to:Exhaust manifold30 + 90° 1)2)3)
Intermediate flange30 + 90° 1)2)3)
Oil return line to:Cylinder block9
Intermediate flange9
Hose clips (13 mm wide)5.5
l  1) Renew nuts/bolts.
l  2) Coat with high-temperature paste; for high-temperature paste refer to → Electronic parts catalogue
l  3) 90° = one quarter turn.

   

Removing and installing exhaust manifold (right-side) > < Exhaust manifold - exploded view