A8 Quattro Sedan V8-4.2L (BGK) (2006)
Oil Spray Jet: Service and Repair
Oil Check Valves
‹› If irregular valve noise occurs repeatedly during short journeys and disappears after extended driving, the oil check valves must be replaced.
Removing
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Remove the intake manifold.
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Remove the crankcase ventilation pipes - 1 and 2 -.
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Remove the cover bolts and cover - 3 - from below the intake manifold.
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Remove the oil check valves - 1 and 2 -.
Installing
Installation is performed in the reverse order of removal, noting the following:
‹› Replace the gaskets and O-rings.