AudiWorld Forums - 05 A6 4.2 Engine Noise Humming/Buzzing

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Lvalle1994

06-17-2018 06:43 AM

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

ChiefKC

06-22-2018 10:38 PM

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.

Lvalle1994

07-14-2018 01:08 PM

Quote:

Originally Posted by ChiefKC (Post 25170277)

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

ChiefKC

07-15-2018 08:38 PM

No problem.

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