Hi all,
I picked up quite a nice Audi A4 3.0 V6 Quattro as a stop gap when I sold my mental golf on.
It's fitted with monstrous 19" alloys from an RS6 which fill the arches nicely but don't come close to rubbing anywhere.
I am getting a problem where I am hearing a droning noise from what appears to be the front off side (but I know could be radiating from anywhere), at 50-80MPH which is road speed dependant but has nothing to do with engine speed. If I dip the clutch it's still there and doesn't seem to change in fast bends, just with road speed.
I have had a Google and wondered if it was due to tyres wearing oddly, and indeed there do seem to be sharp edges to the treads in one direction (which I have read is called a few different things like castling) and may cause a noise because of the percussive effect.
I swapped all four wheels around, front to back hoping it would move the noise to another wheel and the noise is exactly the same.
I also wondered if it might be a wheel bearing, I lifted each corner of the car and span and shook each wheel and can't find any play or roughness other than the slight rub of the brake on the brake disc that you would expect. I have also felt the hubs after a drive and they are only moderately warm.
Furthermore I also gripped, shook and wobbled the driveshafts and can't find any more play than I would expect.
Nothing seems to be rubbing. When I got the car I noticed that the inside edges of all four tyres seemed to be warm so I checked the tyre pressure and the guy was running them at around 20psi. I immediately upped them to 38 but it hasn't changed the symptoms at all.
Does anyone have any more suggestions ? I am tempted to drop 4 matched brand new tyres on it to see if it helps, as the ones on there are budget ones but don't want the expense if that's unlikely to be the issue.
Many thanks,
Malty
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