Squeaky brakes

[S6 Devil]

I recently upgraded my discs to 330mm on the front. These were fitted along with some new Ferodo pads. Since fitting, I have an awful squeaking from the front brakes. It's only when coming to a standstill rather than when braking at speed.

I was advised by the fitting garage that the front calipers were sticking, so sent them off to be reconditioned. There was no squeak before having the discs and pads changed. I have just had them refitted, but the squeak is still there and seems worse. I haven't had issue with squeak with previous pad changes or caliper reconditioning. It's a noise that I just can't live with. Any ideas what could be the problem and how to fix it?

Edited by S6 Devil on Saturday 22 August 17:59

[S6 Devil]

phillpot said:

Worth trying these?

Is your thinking that the pads are moving or vibrating and need securing? I was thinking along the lines of some high temp silicon on the back of the pads. I have read of chamfering the edges of the pads as well.

It's just odd as I have never had an issue with the Ferodo pads before. The calipers have been reconditioned with new seals and one new piston, so can't be that. The discs are Brummies, so of good quality, so can't be that. Got to be the pads hasn't it?

[S6 Devil]

PetrolHeadPete said:

Assume you've tried the anti squeal grease on the back of the pads
Bigger disc means more torque to force the pad out of position in its holder ??

I would have thought they used copper slip. I will ask them on Monday.

[S6 Devil]

Dischordant said:

I had same issue/circumstance and some shims fitted have nearly removed it - still occasional though.

Great, fingers crossed. I have ordered some. I was advised to de-glaze the pads, and even fit them in, in
opposite directions after.

[S6 Devil]

Dischordant said:

I had same issue/circumstance and some shims fitted have nearly removed it - still occasional though.

Had you upgraded to 330mm discs and are you using Ferodo pads?

[S6 Devil]

MrChips said:

I've got ds2500 pads (around 8kmiles on) and recently fitted the 330mm discs. No squeaking here but if I remember back to when I fitted the pads.. They took a good 800miles before the squeaking calmed down. They did it in my old 205 as well.
Get some heat cycles through them and give it some miles before trying anything else would be my suggestion.

When you fitted the 330mm discs did you fit new pads or stick with the old ones. I have my old ones as spares which are only 1/4 used.

[S6 Devil]

Update. Well, I fitted some shims which seemed to help for a while. I've recently been using the car a lot more and the squeal is back and getting worse. It just ruins the driving experience. Thinking of trying the old set of Ferodos or getting rid of the 330mm discs and going for standard.

I can't believe everyone who has upgraded is living with this noise. So what is wrong with my set up? Recently rebushed with poly bushes, calipers reconditioned, new 330mm discs and new Ferodo pads.