A8 Quattro Sedan V8-4.2L (BVJ) (2008)
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Remove air guide hose - 5 - on secondary air injection (AIR) combi-valve by press release buttons.
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Remove bolts - 1, 2 and 6 -.
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Free up electrical wiring on secondary air injection (AIR) combi-valve.
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Remove secondary air injection combination valve - 3 -.
‹› The engine is shown from behind to provide a better illustration.
Installing
‹› Tightening specifications. Refer to => [ Secondary Air Injection System Assembly Overview ] See: Service and Repair.
Installation is in reverse order of removal, note the following:
‹› Replace gaskets and O-rings.
‹› Secure all hose connections with hose clamps appropriate for the model.
‹› During installation, all cable ties must be re-installed at the same location.
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Install Heated Oxygen Sensor (HO2S) 2 (G108) (in front of catalytic converter).
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Install left coolant pipe. Refer to => [ Left Coolant Pipe ] See: Engine, Cooling and Exhaust/Cooling System/Coolant Line/Hose/Service and
Repair/Left Coolant Pipe.
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Fill with coolant => [ Filling ] See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Procedures.