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Rubbing/Grinding Noise?

Posted: Sat Jan 23, 2016 6:08 pm
by Mk2_phil
Hi Everyone,

I know that many of these "Where is this noise coming from?" posts are more like asking how long is piece of string?
But this time I am a bit baffled.

Starting at the beginning; I had an inner CV boot and joint replaced and was told my rear engine mount was perished so I had all of the mounts replaced. Shortly afterwards I started getting in an intermittent rubbing/grinding noise when I drove above 30MPH and/or went up and down hill, I asked my local VW specialist and they said it was likely the gearbox had stripped a cog and something was loose. So I sourced a replacement box and had it fitted. While the noise has lessened and doesn't definitely do it above 30mph, when I go up and down hill it intermittently still does it.

Initially I thought since perhaps the car is on coil overs a wheel was rubbing but the clearance seems fine, then I thought maybe the liner for a wheel arch was catching but nothing is loose.

I have been told that new engine mounts take a few hundred miles to settle in and that would explain some of the stiffness and vibration since the new mounts but not the intermittent rubbing/grinding?

Sound-wise it is is like a plastic/metal grinding, not too high pitched.

Hopefully someone could shed some light on this as I'm running out of ideas! :P

Re: Rubbing/Grinding Noise?

Posted: Sat Jan 23, 2016 7:16 pm
by GTXTRA
Are you running with standard wheels?

Re: Rubbing/Grinding Noise?

Posted: Sat Jan 23, 2016 8:07 pm
by duggers
What Sean ^^^^ said and the fact that you have changed all the stuff the 'professionals' told you to tells you it wasn't any of them unfortunately.

Re: Rubbing/Grinding Noise?

Posted: Sat Jan 23, 2016 8:44 pm
by james butler
as daft as it sounds is there a lip on your front brake disks?
i changed my springs not so long ago and after i got a grinding sound which turned out to be the rusty lip of the disk catching the brake pads.
i could feel it when you jack the car up and spin the wheels, new disks and pads fixed my issue.

Re: Rubbing/Grinding Noise?

Posted: Sun Jan 24, 2016 1:12 am
by DannyH
Wheel bearing??

Re: Rubbing/Grinding Noise?

Posted: Sun Jan 24, 2016 3:59 pm
by eefy
Might be worth checking the front brake plate thingies, the once that stop all the crap from getting on the disk and sit snug behind them. there notorious for rusting through. I had to bend mine out of the way when I replace my front disks as they were scraping. Just another thought or something to check :)

Re: Rubbing/Grinding Noise?

Posted: Sun Jan 24, 2016 5:16 pm
by Mk2_phil
GTXTRA wrote:Are you running with standard wheels?
Yeah standard steelies, the pads are fairly new and the rear break shoes are pretty much brand new. I'll take a look at the guard for the discs tomorrow as theres a chance they were banged out of shape and it might be time for new brake discs (only 2 years old though) as I suppose they could have warped!
DannyH wrote:Wheel bearing??
Could be DannyH.. though it only seems to to heard when the car pitches down or up hill.

Thanks for the pointers guys, any more ideas feel free to comment!