Member Since: 07 May 2009
Location: lightwater
Posts: 1111
Grinding noise with HDC applied
Whilst on hols I had HDC on whilst using a steep cray track. Every time it appeared to work there was an awful metaliic grinding noise from the front offside, the vibration of which I could feel through the brake pedal. This was replicated when braking on a flat section of road with HDC on; it disappeared with HDC off. Any ideas?
22nd Aug 2010 5:10 pm
ELD70
Member Since: 28 Jan 2008
Location: Romford.
Posts: 901
I could be wrong but isnt that the normal kind of noise when HDC is active, I recall mine making a racket as well.Now driving BMW 330d Touring....misses D3...but not when at traffic lights
The vibration, much like when ABS kicks in, yes, but not a metalic grinding noise Check you pads aren't worn through - remember the sensors for pad wear aren't on all discs, so you could have the one side worn out and the other still ok. Long shoot I know, but I'd check anyway.
22nd Aug 2010 5:15 pm
crwoody
Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109
I think you'll find it's normal, just the action of the ABS modulator applying braking force to the wheels, hence the vibration through the pedal.
I have to say it scared the cr@p out of me first time I heard it. Clive
22nd Aug 2010 5:16 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
Normal noise, less though in the facelifted D3s.
22nd Aug 2010 5:49 pm
jkp
Member Since: 17 Sep 2005
Location: Living among Bawbags
Posts: 4528
The 1st time I heard this I though fek, I've broke it. Normal noise and the more you hear it the more reassuring it becomes, because you look for it to happen so you know it's working
22nd Aug 2010 6:05 pm
blowpipe
Member Since: 07 May 2009
Location: lightwater
Posts: 1111
Thanks all; yep, I also feared I'd done something horrible to the car or got solid debris stuck in the brake disc. Suitably reassured
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Check you pads aren't worn through - remember the sensors for pad wear aren't on all discs, so you could have the one side worn out and the other still ok. Long shoot I know, but I'd check anyway.
