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

Mon Nov 30 13:45:54 EST 2015

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 suspect 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 screwdriver to make a "special tool".  Piston retracted easily once turned 45 and with the bleeder open.
The metal frame however, that pushes the outboard pad into the disc, was difficult 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

       From: Guido deTomaso <guido_detomaso at prodigy.net>
 To: De Tomaso List <detomaso at poca.com> 
 Sent: Monday, November 23, 2015 11:26 AM
 Subject: Re: [DeTomaso] Porterfield rear brake pads

  Thanks for the pic.  Looks like a piece of roll pin pressed in?
  I mailed the old factory set of four pads to Porterfield for re-lining,
  along with four brake shoes from an unrelated project.
  They are due back here Wednesday this week.  Muy dinero and it did take
  about five weeks.
  This will be the first time I engage in the "turn the caliper piston 45
  deg." exercise...
  Thanks,
  Guy D.
    __________________________________________________________________

  From: Dennis Valdez <sjcarguy60 at yahoo.com>
  To: Guido deTomaso <guido_detomaso at prodigy.net>
  Cc: De Tomaso List <detomaso at poca.com>
  Sent: Monday, October 19, 2015 7:16 PM
  Subject: Re: [DeTomaso] Porterfield rear brake pads
  I have a set of Porterfield GD 535 R4-S pads for the rear I haven't
  installed yet. The knob on the back is round and stubby.
  Dennis Valdez
  > On Oct 19, 2015, at 5:56 PM, Guido deTomaso
  <[1]guido_detomaso at prodigy.net> wrote:
  >
  >  Has anyone bought Porterfield rear brake pads for stock calipers
  >  recently?
  >  What prompts me to ask is, I found out today the price of re-lining
  old
  >  pads is $139, while new pads are $79.
  >  So it's a high price for sentimentality, keeping the Girling "G" on
  the
  >  back of the pads.
  >  Wondering what kind of a "bump" Porterfield is putting on the back
  of
  >  the new pads, a weld blob or something like the originals?
  >  FWIW the old pads I'm considering re-lining, someone on this list
  >  mailed me many years ago, finally getting around to it.
  >  Thanks,
  >  GD
  > _______________________________________________
  >
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  >
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References

  1. mailto:guido_detomaso at prodigy.net
  2. mailto:DeTomaso at poca.com

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-------------- next part --------------
   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 suspect 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 screwdriver to make a "special tool".  Piston
   retracted easily once turned 45 and with the bleeder open.
   The metal frame however, that pushes the outboard pad into the disc,
   was difficult 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
     __________________________________________________________________

   From: Guido deTomaso <guido_detomaso at prodigy.net>
   To: De Tomaso List <detomaso at poca.com>
   Sent: Monday, November 23, 2015 11:26 AM
   Subject: Re: [DeTomaso] Porterfield rear brake pads
     Thanks for the pic.  Looks like a piece of roll pin pressed in?
     I mailed the old factory set of four pads to Porterfield for
   re-lining,
     along with four brake shoes from an unrelated project.
     They are due back here Wednesday this week.  Muy dinero and it did
   take
     about five weeks.
     This will be the first time I engage in the "turn the caliper piston
   45
     deg." exercise...
     Thanks,
     Guy D.
       __________________________________________________________________
     From: Dennis Valdez <[1]sjcarguy60 at yahoo.com>
     To: Guido deTomaso <[2]guido_detomaso at prodigy.net>
     Cc: De Tomaso List <[3]detomaso at poca.com>
     Sent: Monday, October 19, 2015 7:16 PM
     Subject: Re: [DeTomaso] Porterfield rear brake pads
     I have a set of Porterfield GD 535 R4-S pads for the rear I haven't
     installed yet. The knob on the back is round and stubby.
     Dennis Valdez
     > On Oct 19, 2015, at 5:56 PM, Guido deTomaso
     <[1][4]guido_detomaso at prodigy.net> wrote:
     >
     >  Has anyone bought Porterfield rear brake pads for stock calipers
     >  recently?
     >  What prompts me to ask is, I found out today the price of
   re-lining
     old
     >  pads is $139, while new pads are $79.
     >  So it's a high price for sentimentality, keeping the Girling "G"
   on
     the
     >  back of the pads.
     >  Wondering what kind of a "bump" Porterfield is putting on the back
     of
     >  the new pads, a weld blob or something like the originals?
     >  FWIW the old pads I'm considering re-lining, someone on this list
     >  mailed me many years ago, finally getting around to it.
     >  Thanks,
     >  GD
     > _______________________________________________
     >
     > Detomaso Forum Managed by POCA
     > Posted emails must not exceed 1.5 Megabytes
     > DeTomaso mailing list
     > [2][5]DeTomaso at poca.com
     > [3][6]http://poca.com/mailman/listinfo/detomaso_poca.com
     >
     > To manage your subscription (change email address, unsubscribe,
   etc.)
     use the links above.
   References
     1. mailto:[7]guido_detomaso at prodigy.net
     2. mailto:[8]DeTomaso at poca.com
     3. [9]http://poca.com/mailman/listinfo/detomaso_poca.com
   _______________________________________________
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   To manage your subscription (change email address, unsubscribe, etc.)
   use the links above.

References

   1. mailto:sjcarguy60 at yahoo.com
   2. mailto:guido_detomaso at prodigy.net
   3. mailto:detomaso at poca.com
   4. mailto:guido_detomaso at prodigy.net
   5. mailto:DeTomaso at poca.com
   6. http://poca.com/mailman/listinfo/detomaso_poca.com
   7. mailto:guido_detomaso at prodigy.net
   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