A8L V8-4.2L (BFM) (2004)
Exhaust Manifold: Service and Repair
Exhaust Manifold, Removing And Installing
Removing
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Remove engine.
Only for left exhaust manifold
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Remove guide pipe for oil dipstick (arrow).
Both exhaust manifolds
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Remove exhaust pipe with catalytic converter.
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Unbolt exhaust manifold (arrows).
Installing
NOTE:
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Always replace self-locking nuts.
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Replace gaskets.
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Replace sealing ring for guide tube for oil dipstick
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Installation is the reverse of removal.
Tightening torques
Threaded connection
Tightening torques
Exhaust manifold to cylinder head
25 Nm
Guide tube for oil dipstick to cylinder head
22 Nm