Re: [Amc-list] Amc-list Digest, Vol 8, Issue 61

["John Eckersley" <john.eckersley@xxxxxxxxx>]

Frank and others, thanks so much.  I spoke to Doug at APD today and we
discussed the options - I have gone for the conversion kit he offers,
as the rotors on my car were machined to fit by the previous owner
(they are actually BMW items) but the pads are wearing oddly with lips
at each side, so I'm changing the lot as even if I got the new
calipers, I'd have weird rotors - this way I'll have a full AMC setup.

Thanks to all

John E

> Date: Thu, 30 Aug 2007 19:17:33 -0400
> From: Frank Swygert <farna@xxxxxxx>
> Subject: Re: [Amc-list] Four piston brakes (was American Parts Depot)
> To: amc-list@xxxxxxxxxxxx
> Message-ID: <46D7500D.5010902@xxxxxxx>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> I don't think any of the Brembo or Wilwood brakes will bolt directly to
> the old Bendix brackets, but both have the dimensions of their calipers
> on-line. AMC used the same four piston Bendix calipers as everyone else
> did in the early 60s, so they may have a Mustang or Corvette
> replacement. Many simply replace everything from the caliper bracket out
> with a later AMC brake setup, 79-83 Concord/Spirit/Pacer is the easiest
> to get parts for and least expensive (parts wise). Any 71+ will work,
> just be prepared to pay a premium for rotors with 71-78 disc brakes.
>
> The reason the early four piston calipers leak is the placement of the
> seal. The seal is on the piston and wears the bore slightly oval. All
> new designs have the seal in the body and use a steel piston -- no wear
> or leaks, and if you do get wear replace the piston. That's why the
> bores are sleeved with stainless inserts to correct leaking -- stainless
> is much harder than the original cast iron bores plus it won't rust if
> the car sets a lot (like most muscle collector cars do).
> --------------------------
>
> Date: Thu, 30 Aug 2007 08:39:33 +0100
> From: "John Eckersley" <john.eckersley@xxxxxxxxx>
>
> APD have been great with me - shipping parts to England no problem and
> excellent service.  Doug has been great at answering my e-mail
> questions.
>
> As for the calipers, mine are shot too.  I spent hours dismantling and
> rebuilding them and honed the bores, only to reassemble and find they
> are no better.  As soon as I get a decent pressure built up using the
> vac bleeding kit I have, fuild just pours out of the bores -
> interestingly, it's the lower outer bore on each caliper that's bad.
>
> I was considering whether there might be a better option than resleeved
> calipers (not  least because I have to ship the old ones to the USA and
> that ain't cheap) - I hear the later single pot setup is more reliable
> but I have been told the spindles and other fittings need changing.  I
> was wondering if there are any "performance"
> calipers (wilwood, brembo, whatever) that would fit in place of the 4
> pot bendix ones.
>
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