Touareg 2 V6-3.6L (BHK) (2008)
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Using ring spanner set (3337), remove Heated Oxygen Sensor (HO2S) (G39) and HO2S 2 (G108) in front of catalytic converters.
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Next, remove heat shield with intake manifold support.
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Now remove Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130) and O2S 2 behind TWC (G131) behind catalytic
converters.
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Raise the vehicle.
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Identify both exhaust pipe flanges, this makes assembly later easier.
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Remove nuts on flanges.
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Remove bracket to transmission --> [ (Item 13) Bolt, 25 Nm ] See: Exhaust Manifold, Catalytic Converter and Components Assembly Overview.
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Unbolt flange to exhaust manifold.
To loosen or tighten nuts more easily, shorten a commercially available 16 mm open end wrench to approximately 11 cm handle length.
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First remove exhaust pipe with catalytic converter from cylinders 4 to 6, then from cylinders 1 to 3.
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Remove exhaust manifold.
Installing
‹› When installing exhaust pipes, ensure that the flange connection after the catalytic converter seals tightly. Leaks in this area produce pulsations in
the exhaust. This allows ambient air to reach the lambda probe after catalytic converter and the lambda regulation will be disturbed.
‹› Adjust the exhaust system so that there is sufficient clearance to the transmission and subframe.
The rest of the assembly is basically a reverse of the disassembling sequence.