unsolvable brake squeak

[JB65]

Have been driving my "new" 2011 V8S for 6 months now and enjoying every minute of it. From the beginning, car has been suffering from a mild brake squeak that I would hope disappear but doesn't other than after a few aggressive break sessions.

When checking at the AM dealer for a fix (car is under the extended AM warranty), the answer was that it is probably caused by soft braking in combination with low mileage over the period (car had 15k on the odometer after 7 years..) causing glazing on brake pads. Was a known issue for vantage and DB9, not covered by any warranty. replacing brake pads wasn't even a guaranteed solution.

Disappointed by that reply - any views/insights therefor appreciated!

[bogie]

A very common issue, surprised they didnt do more to try to address it. Yes you can try bedding the pads in again; I think AM even put the procedure in the owners manual in later years.

Similar to this (The OE pads are Pagid) https://pagid.com/wp-content/uploads/2017/06/Beddi...

After last pad change my 2012 Roadster was doing the same, even after following same procedure. I ended up buying a shim kit with anti squeal stuff.

https://www.ebay.co.uk/itm/ANTI-SQUEAL-BRAKE-PAD-S...

Depending on when your car last had pads done it may/may not have shims installed. There was a service bulletin for it quite some years ago and I assumed they would be standard fitment now.

Most of the fixes for "squeaky brakes " is something like this:

1. Take wheels off, take pads out
2. chamfer edge of pads with sandpaper and give everything a good clean
3. refit pads with anti squeal shims, and light smear of ceratec on rear of pads/shims
4. Go for a drive and repeat new pad bedding in procedure

my new pads have been fine since doing this a few thousand miles ago.

[telum01]

Not unsolvable at all. It's the design of the OEM pads. If you want to keep the OEM pads, do as Bogie said (chamfer the leading/trailing edges, put anti-squeal compound on the backing plates). Otherwise, switch to aftermarket pads. Porterfield R4-S pads are far, far more suitable for most drivers. I typically tell people that the R4-S isn't suitable for track use, but you can do it with cars that have the 6-piston front calipers just fine.

[Robbo1969]

Hi Telum,

My DB9 had the same issue for a few weeks.

It seemed to happen shortly after the rather fabulous track day at Rockingham a lots of us here went on. It involved a lot of hard braking from 90mph to go around hair pin corners!!

The advice I got was to drive down a hill and then slam your brakes on. I did this a couple of times and it seems to have worked so far!

I haven't got around to taking off the wheels and sanding down the edges as some have receommended (and probs never will!)

But, yes, try braking hard a few times and the awful screeching should go and save embarrassment in the middle of towns!!

Cheers, Guy

[telum01]

Robbo1969 said:

The advice I got was to drive down a hill and then slam your brakes on. I did this a couple of times and it seems to have worked so far!

I haven't got around to taking off the wheels and sanding down the edges as some have receommended (and probs never will!)

But, yes, try braking hard a few times and the awful screeching should go and save embarrassment in the middle of towns!!

The original post said he tried hard braking that only fixed the issue for a short period, which leads me to believe glazing isn't the issue. You likely had glazing in your situation due to the high temperatures your brakes experienced during your track day.
With 15k miles of soft braking, the rotors should still be in good condition, so I'd rule out worn rotors causing OP's problem.
So the next best bet is what Bogie recommended, which permanently fixes the problem the majority of the time, or aftermarket pads.

[Robbo1969]

Sorry Telum,

In my rushed reply, I thought you were the original poster.

I'll be getting my pads looked at at service time anyway.

Cheers.