S4 V8-4.2L (BHF) (2004)
NOTE: Illustration shows engine/transmission assembly removed.
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Unscrew bolt - arrow - at strap for left front exhaust pipe.
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Remove nuts - 1 to 3 - for left front exhaust pipe/exhaust manifold.
NOTE: Illustration shows engine removed.
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Pull front exhaust pipe off of left exhaust manifold.
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Remove front exhaust pipe with front and main catalytic converters.
Installing
Installation is performed in reverse order of removal. Note the following:
NOTE:
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Replace self-locking nuts.
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Secure all hose connections using hose clamps appropriate for the model type Parts Catalog
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During installation, reinstall all cable ties at the same locations.
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Tighten nuts - 1 to 3 - of front exhaust pipe/exhaust manifold bolts uniformly in stages. Align catalytic converter horizontally while tightening.
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Install subframe.
NOTE: Individual mounting components of exhaust system on transmission