Deep drone on intense braking

[K-Serious]

why does my S" do this now? It increased as the previous pads wore down unitl i changed them. But its still making the noise now that the news ones are on and bedded in(green stuff)

also car has been pulling to left over same time frame during braking

can anyone help with this one?

cheers

[steff]

Not the wife/girlfriend/bit on the side is it???!

I find in my car the droneing increases proportionaly with the performance used.

[StuartB]

Does the car *always* pull to the left on braking ? Typically the camber of the road migh be enough to cause that behaviour.

Just a guess, but wheel bearings ? Normally these are more evident at speed but given the other noises that you get at speed it might get drowned out ?

[fergusd]

Sounds like either cross drilling nose or some runout on the disks or some corrosion . . .

if you're a GJOB and let the disks rust up frequently I'd expect this kind of noise . . .

fd

[nick_houghton]

get some anti-rattle pads & put some goostuff on the reverse of the brakepads - will sort it.

>> Edited by nick_houghton on Wednesday 16th February 11:13

[telecat]

Forgive my ignorence but do the brakes have shields on the inside. I got a "droneing" noise when a stone got caught between the disk and the shield on a Mondeo.

[tricky 100]

If it pulls to the left on braking ,this is normally an indication of a problem with right hand side brakes not operating properly , possibly a partially seized caliper . The droning could be the ns pads overheating.

[adrianr]

99% it is the wheel bearing. To check, jack up car, remove wheel, turn hub gently back and forward by hand. Any roughness _at_ _all_ means bearing is shot. You may need to push the brake pads back a little, or even take the disc off to allow the hub to rotate freely.

Pulling could be caused by increased friction under load as the hub moves slightly in the worn bearing; if severe it could also affect your toe-in.

Estimate £25-30 ish for a bearing if you have access to a bench press to get it out of the hub; £100-£120 to do the whole job from an independent.

AdrianR

[stevokenevo]

I have got the same problem with a rear at the moment. Fitted new drilled discs and green stuff pads. Looking at the rust mark on the disk it seems that the caliper is not working correctly, I believe it to be a sticking piston. Maybe.