A4 Quattro Cabriolet V6-3.0L (BGN) (2005)
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Remove bracket for front exhaust pipe (arrow).
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Remove nuts -1- and -3- for front exhaust pipe/exhaust manifold which are accessible from bottom.
NOTE: Illustration is shown with engine removed.
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Remove front exhaust pipe with catalytic converter.
Installing
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Installation is reverse of removal, noting the following:
NOTE:
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All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.
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Oxygen sensor threads are coated with an assembly paste. This paste must not contact sensor openings.
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Oxygen sensor wiring must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.
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Replace gaskets and self-locking nuts.
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Install transmission supports.
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Install subframe.
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Installing driveshaft.
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Install exhaust system free of stress.
NOTE: Individual mounting components for exhaust system to transmission on vehicles with automatic transmission 01 V, see fig. 5.
Tightening torques
Component
Nm
Front exhaust pipe with catalytic converter to
exhaust manifold
27
Front exhaust pipe with catalytic converter to
hanging strap
25
Mounting straps to transmission
25
Drive axle protection to transmission
23
Oxygen sensor to catalytic converter
55