[alfa] Re: Rattling brake pads

[Mark Denovich <denovich@xxxxxxxxx>]

I'm wondering if it's the rubber seals pulling the pistons back far
enough to allow the pads to flop around.   Maybe I just need to wait
until this caliper gets crusty too.   The entire system was well
flushed and bleed, and I have great brake feel.

--Mark


On Thu, 1 Jul 2004 13:07:05 -0400, Joe Elliott <jee@domain.elided> wrote:
> 
> But if there's axial slop in the piston-pad-disc assembly, then your
> pedal travel is going to be longer than it needs to be.  If that's
> the case, I would recommend some kind of shim, although I don't
> understand why this piston wouldn't just stay put after pressure is
> released.  Perhaps the problem lies with the master cylinder or
> pressure regulator, and it's only apparent on the new caliper because
> the pistons on the other side are too crusty to move that freely in
> their bores.
> 
> -Joe
> 
> At 3:30 PM +0000 7/1/04, alfa-digest wrote:
> >Date: Thu, 1 Jul 2004 19:36:55 +0930
> >From: "The Baylys" <dabaylys@domain.elided>
> >Subject: Re: [alfa] Rattling brake pads
> 
> 
> >
> >Mark,
> >
> >you can buy 'anti-squeal' which is just a rubber/silicone compound you apply
> >to the backing plate of the pad where the piston touches.  A smear of this
> >should fix the noises.
> >
> >Then again, the noise will likely disappear after a few miles.
> >
> >Beatle
> >Oz
> >- ----- Original Message -----
> >From: "Mark Denovich" <denovich@domain.elided>
> >To: <alfa@domain.elided>
> >Sent: Thursday, July 01, 2004 10:25 AM
> >Subject: [alfa] Rattling brake pads
> >
> >
> >>  Put new pads (Carbotech Hawks) and rotors all the way around on my '86
> >>  Spider.   I also replaced the driver's rear brake caliper as the
> >>  piston was hopelessly stuck in the bore.   I was low on patience and
> >>  shelled out the $100 for a refurb unit.
> >>
> >>  Everything works great.  The new pads kick ass.   The only problem is
> >>  that in the newly replaced caliper the pads flop around a bit and make
> >>  noise.   It seems like the pistons retract far enough to allow them to
> >>  move around and make noise.   This noise goes away with the lightest
> >>  touch on the brake pedal.   I confirmed that the pads have a ton of
> >>  clearance at rest, and that nothing else is loose.   Pad spring is
> >>  properly installed.
> >>
> >>  Should I just live with it?   I only hear the noise when I'm driving
> >>  next to a Jersey barrier where it is reflected back at me.
> >  >
> >>  --Mark
> >>
> >>  PS:  The Alfa Wiki is currently off-line.  For some reason power
> >>  problems only seem to occur when my sysadmin is on vacation.   It's
> >>  hosted for free so I can't really complain.   Need to invest in UPS.
> >  > This also explains the gmail.com email address.
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