[DeTomaso] Replaced rear brake pads, was Re: Porterfield rear brake pads

Guido deTomaso guido_detomaso at prodigy.net
Sat Dec 5 16:18:14 EST 2015 



Too good for the room.
Anyway, was wondering if Garth could recall if his inboard pads were a free fit or a hammer fit, he hasn't piped up however.
GD
       From: Asa Jay Laughton <asajay at asajay.com>
 To: detomaso at poca.com 
 Sent: Tuesday, December 1, 2015 8:59 PM
 Subject: Re: [DeTomaso] Replaced rear brake pads, was Re: Porterfield rear brake pads
   
I'm guessing they re-lined them like that in order to allow you to 
trim-to-fit.

Asa  Jay

Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
&  Shelley Marie
Spokane, WA
******************************
http://www.racingagainstautism.com/
http://www.teampanteraracing.com/
http://facebook.com/racingagainstautism


On 12/1/2015 5:08 PM, Guido deTomaso wrote:
>    That's kinda interesting.
>    What I discovered today was, the friction material on my re-lined
>    Porterfield pads was too long.  Not too thick in the wear direction,
>    but too long in the disc circumference direction.  So on the inboard
>    pad, they got wedged in to the caliper body very tight.  Took hammer
>    blows to install, I had to admit to myself those pads would likely
>    stick.
>    So took them out, very difficult since they were wedged in so tight,
>    sanded the ends down, avoiding sanding the metal backing plates, tried
>    to only sand the friction material.  Once sanded, they dropped in
>    easily.
>    The stock pads, the friction material is slightly shorter than the
>    metal backing plate ... something to be learned there.
>    GD
>      __________________________________________________________________
>
>    From: Garth Rodericks<garth_rodericks at yahoo.com>
>    To: "guido_detomaso at prodigy.net"<guido_detomaso at prodigy.net>; DeTomaso
>    Mail List<detomaso at poca.com>
>    Sent: Monday, November 30, 2015 11:02 AM
>    Subject: Replaced rear brake pads, was Re: Porterfield rear brake pads
>    The problem I had after installing my new Porterfield pads years ago
>    was the caliper pistons on the rear right wheel got stuck in their
>    bores because of all the gunk/varnish that built up in there there over
>    the years - it had been a long time since the pistons were pushed that
>    far back into their bores. Calipers released after a few good whacks
>    with the handle of a screwdriver as well as letting things cool down -
>    don't know which really solved the problem, but they haven't stuck
>    since.
>    --- Original Message ---
> Well, yesterday I replaced the rear pads on one side, ran out of daylight before
>  I could do the other side.
> Wasn't too difficult, had never tampered with that aspect of the car before, I s
> uspect no one else had either.
> Didn't realize / had forgotten that a piston pokes out both sides of the caliper
>  cylinder ... wasn't too difficult to turn the slotted piston 45 deg., but wasn'
> t easy either.  Wound up cutting the blade off a Craftsman square-shank screwdri
> ver to make a "special tool".  Piston retracted easily once turned 45 and with t
> he bleeder open.
> The metal frame however, that pushes the outboard pad into the disc, was difficu
> lt to slide outboard to accommodate the new, much thicker pad.  Took infinity of
>  dead-blow hammer strikes.
> Old pads pretty thin at 75K miles,  I suppose the p-valve is working or did work
>  at one time.
> Wondering now how often the seals fail after a pad change, from all the turning
> and sliding of the piston.  Are rebuild seals and parts still available?
> Thanks,
> GD
>
>
>
> _______________________________________________
>
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>
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-------------- next part --------------
   Too good for the room.
   Anyway, was wondering if Garth could recall if his inboard pads were a
   free fit or a hammer fit, he hasn't piped up however.
   GD
     __________________________________________________________________

   From: Asa Jay Laughton <asajay at asajay.com>
   To: detomaso at poca.com
   Sent: Tuesday, December 1, 2015 8:59 PM
   Subject: Re: [DeTomaso] Replaced rear brake pads, was Re: Porterfield
   rear brake pads
   I'm guessing they re-lined them like that in order to allow you to
   trim-to-fit.
   Asa  Jay
   Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
   &  Shelley Marie
   Spokane, WA
   ******************************
   [1]http://www.racingagainstautism.com/
   [2]http://www.teampanteraracing.com/
   [3]http://facebook.com/racingagainstautism
   On 12/1/2015 5:08 PM, Guido deTomaso wrote:
   >    That's kinda interesting.
   >    What I discovered today was, the friction material on my re-lined
   >    Porterfield pads was too long.  Not too thick in the wear
   direction,
   >    but too long in the disc circumference direction.  So on the
   inboard
   >    pad, they got wedged in to the caliper body very tight.  Took
   hammer
   >    blows to install, I had to admit to myself those pads would likely
   >    stick.
   >    So took them out, very difficult since they were wedged in so
   tight,
   >    sanded the ends down, avoiding sanding the metal backing plates,
   tried
   >    to only sand the friction material.  Once sanded, they dropped in
   >    easily.
   >    The stock pads, the friction material is slightly shorter than the
   >    metal backing plate ... something to be learned there.
   >    GD
   >
   __________________________________________________________________
   >
   >    From: Garth Rodericks<[4]garth_rodericks at yahoo.com>
   >    To:
   "[5]guido_detomaso at prodigy.net"<[6]guido_detomaso at prodigy.net>;
   DeTomaso
   >    Mail List<[7]detomaso at poca.com>
   >    Sent: Monday, November 30, 2015 11:02 AM
   >    Subject: Replaced rear brake pads, was Re: Porterfield rear brake
   pads
   >    The problem I had after installing my new Porterfield pads years
   ago
   >    was the caliper pistons on the rear right wheel got stuck in their
   >    bores because of all the gunk/varnish that built up in there there
   over
   >    the years - it had been a long time since the pistons were pushed
   that
   >    far back into their bores. Calipers released after a few good
   whacks
   >    with the handle of a screwdriver as well as letting things cool
   down -
   >    don't know which really solved the problem, but they haven't stuck
   >    since.
   >    --- Original Message ---
   > Well, yesterday I replaced the rear pads on one side, ran out of
   daylight before
   >  I could do the other side.
   > Wasn't too difficult, had never tampered with that aspect of the car
   before, I s
   > uspect no one else had either.
   > Didn't realize / had forgotten that a piston pokes out both sides of
   the caliper
   >  cylinder ... wasn't too difficult to turn the slotted piston 45
   deg., but wasn'
   > t easy either.  Wound up cutting the blade off a Craftsman
   square-shank screwdri
   > ver to make a "special tool".  Piston retracted easily once turned 45
   and with t
   > he bleeder open.
   > The metal frame however, that pushes the outboard pad into the disc,
   was difficu
   > lt to slide outboard to accommodate the new, much thicker pad.  Took
   infinity of
   >  dead-blow hammer strikes.
   > Old pads pretty thin at 75K miles,  I suppose the p-valve is working
   or did work
   >  at one time.
   > Wondering now how often the seals fail after a pad change, from all
   the turning
   > and sliding of the piston.  Are rebuild seals and parts still
   available?
   > Thanks,
   > GD
   >
   >
   >
   > _______________________________________________
   >
   > Detomaso Forum Managed by POCA
   > Posted emails must not exceed 1.5 Megabytes
   > DeTomaso mailing list
   > [8]DeTomaso at poca.com
   > [9]http://poca.com/mailman/listinfo/detomaso_poca.com
   >
   > To manage your subscription (change email address, unsubscribe, etc.)
   use the links above.
   >
   >
   > -----
   > No virus found in this message.
   > Checked by AVG - www.avg.com
   > Version: 2016.0.7227 / Virus Database: 4477/11099 - Release Date:
   12/01/15
   _______________________________________________
   Detomaso Forum Managed by POCA
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References

   1. http://www.racingagainstautism.com/
   2. http://www.teampanteraracing.com/
   3. http://facebook.com/racingagainstautism
   4. mailto:garth_rodericks at yahoo.com
   5. mailto:guido_detomaso at prodigy.net
   6. mailto:guido_detomaso at prodigy.net
   7. mailto:detomaso at poca.com
   8. mailto:DeTomaso at poca.com
   9. http://poca.com/mailman/listinfo/detomaso_poca.com
  10. mailto:DeTomaso at poca.com
  11. http://poca.com/mailman/listinfo/detomaso_poca.com

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