Audi B6 A4 3.0 Intake Actuator Issue - YouTube (Sally Schwartz) Timing chains located at rear of engine. Audi Parts > Audi Technical Articles > VW / Audi Intake Manifold Removal. The sound starts when I move the key to the ON position, without starting the engine.
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This video "Noise of a Anti Shudder Valve / Inlet Manifold Flap ready to blow" is similar and suggests impending doom (or at least failure of the valve).
Would you like to tell us about a lower price? Removal/installation of timing chain(s) Gearbox/drive plate removal. Avoid the cost of a complete new manifold and actuator motor this would only fail again and necessitates the removal of the fuel lines which can cause other issues.
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