[Shotimes] rear calipers sticking

[Kevin & Cheryl Airth]

Mike:
 Several people have fought this problem unsuccessfully. I have found that
the rear caliper bracket is a possible suspect. I helped one guy who did
pretty much as you have and still had the rears stick but not consistently.
The only thing not replaced was the bracket. Changed both brackets and fixed
the problem. I still don't see how/why the bracket can get bent or
distorted. I wonder if the disc is not seating perfectly flat?

Now with both side doing it, have you done the obvious? Change the rear
rubber brake hoses? Also the rear pressure valve? Check the linkage too. Do
the rears bleed as easy as the front calipers? If you have not changed rear
brake hoses I would start there.
.
.



> I've been having a problem with my rear calipers.  When I release the
> parking brake, they want to stick for a while.  So much so that the car
> won't roll down my driveway on its own.
>
> Both calipers are new NAPA units.  In fact, I replaced one of them
> again because the replacement leaked around the piston.  The slide
> pins should still be greased up good.  The cables were just replaced
> last month.  The shop that did the cables played with the adjustment,
> and they're convinced that the calipers are sticking.  They had the
> cables adjusted so far out that when the pedal was released, there
> was no tension on the caliper.  I'm convinced.
>
> This only happens when it is pretty cold out.  (of course, it's going to
> start happening alot more now)  What are the odds that the calipers
> are bad again?  Maybe a batch of calipers were remanned with too
> tight of tolerance in the pistons?  Or, because it only does it when
> it's cold, if the caliper housing and the piston were different materials,
> they contract differently in the cold?  I thought I read where they can
> have steel or phenolic pistons.  I won't know what I have until I take
> them off again.
>
> So, anybody ever have this kind of problem before?  Any comments?
> Constructive, that is.  ; )
>
>
> Mike Wojton
> Toledo, Ohio
>
> -'95 White MTX
>    '96 Brake Upgrade