Actually, while I don't have a lot of knowledge of newer floating calipers,
on older designed fixed calipers the pads are always lightly rubbing on the
rotors, they do not retract. This wiping action is one of the reasons for
improved wet braking compared to drums. Identifying the cause of squeal is
one of those things that can drive you nuts. It may be caused by sympathetic
vibrations between the pad material and rotors. If that's the case you may
want to try anti-squeal compound on the backs of the pads. Or, you may want
to try an aggressive bed in procedure. On and off chirping can also indicate
disc run-out (many call it warping these days) Use a dial indicator to see
if the rotors are true. If not, they can be cut if still within tolerance.
Also, these Dunlop calipers have no guide pins, Pins are used on floating
calipers, and yes the pads are the same as the series 1 XKE.
Jerry Krakauer
SRL311 00099
-----Original Message-----
From: datsun-roadsters-bounces@autox.team.net
[mailto:datsun-roadsters-bounces@autox.team.net] On Behalf Of Dan Kroninger
Sent: Monday, May 20, 2013 1:29 PM
To: Datsun Mailing List
Subject: [Roadsters] Brake question
All,
I have an issue with my brakes that I have had since I bought the car. On
shorter drives, I have no issues, but when I drive for more than an hour I
get this squeak from the brakes. It sounds like a squealer on modern disc
brakes to alert when the pads are getting low. I get it on both front
brakes but not all the time and not always at the same time. Stepping on
the brakes makes it go away for a while, but the it comes back. Some times
it is a chirp chirp chirp and other times its a constant squeal.
So far, I have replaced the hoses with stainless steal, replaced the pads,
rebuilt the calipers, and bled the brakes several times. They are correctly
and fully adjusted. Any thoughts as to the cause? It seems like the
calipers are not retracting completely, but I don't know why. The problems
seems worse on hot days, but happens in the cold too.
The pads are a bit tight in the caliper. should they be filed down on the
edges?
Thanks in advance for your knowledge.
Dan
Dairyland Datsuns
68 1600.
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