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05 A6 4.2 Engine Noise Humming/Buzzing

05 A6 4.2 Engine Noise Humming/Buzzing

 
Old 06-17-2018, 06:43 AM
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Default 05 A6 4.2 Engine Noise Humming/Buzzing

When i start my car theres a buzzing/ humming noise coming from the area near the end of the engine close to the throttle body. I only hear it when idle but when i accelerate either at a stand still or driving it goes away. I can hear it through the dash. And help is always welcome. Heres a link of what it sounds like.
https://youtu.be/OlLwN6js_sA
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Old 06-22-2018, 10:38 PM
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Check your PCV Valve. I had a loud noise coming from the same area on my Q7 4.2 and it turned out that an o-ring o the mating surface had failedand was allowing air by.
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Old 07-14-2018, 01:08 PM
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Originally Posted by ChiefKC View Post
Check your PCV Valve. I had a loud noise coming from the same area on my Q7 4.2 and it turned out that an o-ring o the mating surface had failedand was allowing air by.
UPDATE: So i ended up changing the PCV Valve like you said and the noise is GONE. thanks man that thing was driving me crazy
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Old 07-15-2018, 08:38 PM
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No problem.
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