[Healeys] Squealy Brakes

[Harold Manifold]

Did the rotors ever have a light layer of surface rust? This can happen if
the car sits too long in an unheated area. When you start driving the car
again the rust layer imbeds itself into the pads. My experience is once the
rust gets embedded in the pads there isn't much you can do to remedy the
situation other than change to new pads.

Harold



On Mon, Apr 15, 2024 at 5:32 PM m.g.sharp--- via Healeys <
healeys at autox.team.net> wrote:

> Hi all,  I have had intermittent squealy brakes on my BT7 the last year or
> so.  I got it out of hibernation a week ago and the squealing is worse, it
> seems.  I don’t mind heads turning when I pull up at a light, but not
> because it sounds like I just ran over a cat.
>
>
>
> I put new pads in a few years back and installed the anti-squeal shims,
> but they did not work.   Today I pulled out the pads, tossed the shims and
> lightly rubbed the pads on a sheet of #120 emery on a plate of glass, just
> to take the sheen of the friction side and ensure the backs were flat.  I
> took a file and gently broke the leading and trailing edges of the friction
> material, as the edges were quite sharp and though one could be catching.
> I then cleaned the pads with brake part cleaner.   I also lightly used
> emery on the disks to remove any glaze.   I had gone to my local auto parts
> supplier to see if  they had any anti-squeal shims but they don’t sell them
> separately from the pads.  However, they highly recommended a Permatex
> product with the promising name “Disc Brake Quiet” [sic].   This I applied
> per the instructions, spraying it on the back of the pads.  I blew the dust
> out of the calipers and, as best I could, checked the pistons for
> irregularities where they bear on the pads.  The calipers were re-built
> about 5 years ago with stainless pistons and they looked as new.  Retaining
> pins were cleaned and very lightly greased.  I re-assembled everything and
> went  out for a test drive.
>
>
>
> The results were staggering in that there was no difference whatsoever.
>
>
>
> So folks – any good ideas out there?  I am wondering if should switch out
> the pads, but mine are barely worn and I am not sure I have record of what
> I put in, so may end up with the same make.  Other than that, I am
> flummoxed.
>
>
>
> All suggestions welcome.
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