Humming / Grinding noise when driving over 30 kmh

[Hamza]

Hello everyone, looking for help here, would appreciate it.

 

Started hearing humming and grinding sound coming from the front of my Audi A6 C7 two weeks ago. 
Never had any problems with the car, clean maintenance done always on time, oil change, filters ect. After switching from my 18” winter wheels to my 20” rotors summer I started to hear this sound (will attach a video down if its possible) but not right away, 3 days after the wheel change. Brought the car back to the mechanic, they tried to see if its a wheel bearing problem but after rotating it, looking at it couldnt find anything, they said its good to drive but I feel it isnt , it sounds worse now then 14 days ago.

The noise increases either speed, when you slow down from for example 90kmh down it makes like a jet noise haha helicopter noise I dont even know.

Also you can feel a little vibration in the steering wheel and also in the gas pedal (automatic gearbox to mention), steering wheel is a little so to say soft when you go right but when you rotate left its more rought.

 

any help would be appreciated, thank you!

[cliffcoggin]

Is there any damage to the summer tyres, or a foreign body such as a stone jammed in the tread? Are they even at the correct pressure?

[Hamza]

Thank you for the fast reply.

Yes they will be 4 years now in July, they have some outer damage, like ripped on some parts of the outer wall and also on them there is damage on few spots, deeper ones and cuts.

since it wouldnt let me attach a file up there I will provide a google drive link to the video so if you could check would appreciate it. thank you 

 

https://drive.google.com/file/d/1_sxytpyKlPQB4zKVt4Mzt4rWkFDFmclJ/view?usp=share_link

[cliffcoggin]

Sorry Hamza, I will not open links to untrusted sources, however if the tyres are as bad as you describe I have no doubt they are the cause of the noise.

[Hamza]

Thank you for the help, I will definitely change them asap, also will attach a YouTube link later for anyone wanting to listen, I know google d links are untrusted, totaly get you.

 

appreciate it

[Hamza]

I will leave a link to my youtube video, uploaded it so please if anyone can see whats wrong, just bought new pirelli tires 265/35/20 like these summer tires, but the sound still persists , could it really be a wheel bearing, should I change that?

 

 

Edited yesterday at 07:53 AM by Hamza

[cliffcoggin]

All I hear Hamza is tyre noise. I hear nothing unusual, which is a common problem when recordings are played back. You have become mentally attuned to the sound your car makes.

Note that some tyres are much noisier than others, and affected more by the road surface. What happens if you refit the winter tyres and drive along the same stretch of road? Does the noise change or disappear?

[Hamza]

Thanks again for the fast reply, fitted the winter tires, same sound still.

 

did go to a different mechanic and turns out a wheel bearing was damaged and also something with the gearbox, had him look closer into it, but it shouldnt be something costy as he stated that on his A6 there was that same problem.

 

thank you for the great help and also will definitely take your advice and change the tires too.