[Supras] More Brake caliper stuff

[Dana Franklin]

Hmmm...now I've never gone that road in the thought process.

I guess the rotor not being on the hub true could cause this too.  But 
then again, that would cause vibration during braking.  That's not 
happening.  The thing is, I think the piston will fall back even when 
the car isn't moving.  I guess I could test that by pumping the brake up 
while not moving, letting off, wait a minute and hit it again to see if 
I have to pump it again. 

Otherwise, I can only assume that I rolled or pinched ANOTHER seal.

Jeff Mohler wrote:

> On any car but the MK3...this is a textbook bent spindle/hub, or a
> weak one where in racing it deflects.  If youve changed ALL of these
> other things..man, I dunno...
>
> Driving stress puts the caliper off center to the hub/spindle, and
> forces the pistons in..which require an extra pump to get it back to
> the rotor surface.
>
>
> I get this in my RX7s (One of which won the NASA Nationals PTE class
> and a new track record for the class at Mid Ohio this week) and I put
> a spring under the piston which once were off a corner, pushes the
> piston back to where it belongs so the nextbraking area has a stiff
> pedal.
>
> On 9/18/06, Dana Franklin <bonescom at bellsouth.net> wrote:
>
>> Since we're on the subject, I have a good one for you guys.
>>
>> A few years ago, I went through all four calipers.  I can't recall for
>> sure, but I think one was leaking so I rebuilt them.  Ever since, I have
>> a rattle in the right front and I found that the caliper seems loose on
>> the pins.  At first, I replaced all the pins and their hardware.  Same
>> thing.  In addition, I have a pedal that needs one good pump before they
>> come up to the top.  I found out that the when you hit the brake, the
>> piston is making it's way all the way back into the caliper.  Thus, each
>> time you hit the brake, you have to move the piston all that way again.
>>
>> I'd seen this before.  Usually, it's a rolled o-ring.  So, I bought a
>> new kit and rebuilt it again, being very careful this time.
>>
>> Now, this is by no means the first set of calipers I've rebuilt in my
>> life but, for whatever reason, it was fine for about a day and it was
>> back to doing it again.  I can't think of anything that could be wrong
>> with the caliper or the piston that would cause that.  I messed with
>> that thing on the bench after I put it back together and it worked fine.
>>
>> Just wanted to throw that out and see what you guys thought.
>>
>> -- 
>> Dana Franklin a.k.a. "Bones"  87T
>>
>> SOGI Member (Supra Owners Group International) http://www.supras.com
>>
>>
>>
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>
>

-- 
Dana Franklin a.k.a. "Bones"  87T

SOGI Member (Supra Owners Group International) http://www.supras.com
SCORE Member (Savannah-Chatham Offroad Racing Enthusiasts)  http://www.score-racing.org