S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
Engine Oil Check Valve: Service and Repair
Oil Check Valves and Spray Nozzle Valve, Removing and Installing
Oil check valves and spray nozzle valve, removing and installing
Note:
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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 intake manifold.
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Remove oil filter housing.
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Remove bolt -1- and remove right rear knock sensor.
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Remove hose of crankshaft housing ventilation - arrow -.
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Unscrew cover -2- for oil check valves.
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Remove seal.
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Remove oil check valves -1- and -3-.
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Remove spray nozzle valve -2-.
Installing
Installation is in reverse order of removal, note the following:
Note: