[DeTomaso] Seals

Thu Jul 3 16:07:09 EDT 2014

The thing I love most about this forum is the variety of folks that use it.
I am in the midst of honing the clutch slave cylinder; fortunately it is not
that bad.  

Silicon brake fluid.  Talk about an emotional issue.  My poor '69 XKE just
doesn't know how bad it has it.  I pulled rubbing alcohol through the clutch
and brake systems 35 years and 140,000 miles ago to clean out the paint
remover that was in it, pulling from the bleeds on the calipers and the
clutch slave.  I then pulled a vacuum to clean out the flushing alcohol, and
filled with silicon fluid.

I've purged it every 5 years or so since.  And, well, 35 years later the
brakes and clutch still work.  Go figure.

I don't race my cars, I don't want to race my cars, and I don't want to have
the hassle of using a fluid designed to soften seals.  I also don't drive
the Silver State events.  Not sure what Silver State events are, but I don't
drive them.

Reminds me of a comparison some guy down in Dallas did 40 years ago - showed
that a nail rusted in silicon brake fluid and didn't in paint remover.  Go
figure.  Being a chemical engineer I sort of discounted that demonstration.

Had this discussion many times over the years - always admire those who want
to go racing, but have to wonder if they ever think about those of us
grannies that just like to drive our cars.  At less than 100 mph.  To my way
of thinking silicon is good stuff if one is not panic stopping often from
high speeds.

Stephen Nelson

SNClocks.com <http://www.snclocks.com/> 

Click here to join one of our mailing lists Contact
<http://fs19.formsite.com/kagforms/form675003155/index.html>  Lists

Click here for our new
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ulcimers/19824807_4sHGgj#1558377542_LKmkrT7> Hammered Dulcimers galleries

Click here for my new blog <http://www.perfectoldman.com/>  on finding
happiness in retirement 

  _____  

From: jderyke at aol.com [mailto:jderyke at aol.com] 
Sent: Thursday, July 03, 2014 12:23 PM
To: steve at snclocks.com; detomaso at poca.com
Subject: Re: [DeTomaso] Seals

Two problems with stock clutch slave cylinders. First, they are made of some
sort of pre-rusted iron. Pits form immediately even in the box. Second, when
you hone out the pits that tear up seals, the resulting bore is often either
too oversized for new replacement seals to fit, or the honed bore becomes
cone-shaped front-to-back. So the repair usually leaks within a week. And
since the clutch hydraulics wear out as a system, fixing the slave often
causes a matching master to begin leaking.

The REAL Fix is to find a slave (or master) that does not instantly corrode:
hard-anodized aluminum or a steel or brass liner pressed in a stocker. This
has been a problem since the Pantera was still in production. All the above
'fixes' applies to clutch masters too. Some originality-freaks use silicone
fluid in non-leaking clutches only. Clutch pressures are low enough so the
stuff works half-way-decently on the street, unlike in brakes. But I
wouldn't drive Silver State events with silicone fluids anywhere in my car. 

-----Original Message-----
From: Stephen Nelson <steve at snclocks.com>
To: detomaso <detomaso at poca.com>
Sent: Thu, Jul 3, 2014 11:22 am
Subject: [DeTomaso] Seals

   Got to the point I needed seals for the clutch slave cylinder on 5332.
   Talked to Dennis at my favorite supplier - Panty Perf - he doesn't
   carry.  So, tried a couple of seal outfits here in Portland.  Unanimous
   opinion - people don't carry seals any more, but one shop did manage to
   find a 1 inch piston that would go in, and all I would have to do is
   turn a different cup on the end that the rod goes into.

   So, being from OKC - I called Sealco in OKC.
   [1]http://www.sealcompany.com/  God bless Sealco.  I used to live in
   OKC - needed any kind of seal they had it.  And yup, like $3.30 each -
   no problem.

   Youse guys need seals - Call Sealco!

   Stephen Nelson

References

   1. http://www.sealcompany.com/
_______________________________________________

Detomaso Forum Managed by POCA

DeTomaso mailing list
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-------------- next part --------------
   The thing I love most about this forum is the variety of folks that use
   it.  I am in the midst of honing the clutch slave cylinder; fortunately
   it is not that bad.

   Silicon brake fluid.  Talk about an emotional issue.  My poor '69 XKE
   just doesn't know how bad it has it.  I pulled rubbing alcohol through
   the clutch and brake systems 35 years and 140,000 miles ago to clean
   out the paint remover that was in it, pulling from the bleeds on the
   calipers and the clutch slave.  I then pulled a vacuum to clean out the
   flushing alcohol, and filled with silicon fluid.

   I've purged it every 5 years or so since.  And, well, 35 years later
   the brakes and clutch still work.  Go figure.

   I don't race my cars, I don't want to race my cars, and I don't want to
   have the hassle of using a fluid designed to soften seals.  I also
   don't drive the Silver State events.  Not sure what Silver State events
   are, but I don't drive them.

   Reminds me of a comparison some guy down in Dallas did 40 years ago -
   showed that a nail rusted in silicon brake fluid and didn't in paint
   remover.  Go figure.  Being a chemical engineer I sort of discounted
   that demonstration.

   Had this discussion many times over the years - always admire those who
   want to go racing, but have to wonder if they ever think about those of
   us grannies that just like to drive our cars.  At less than 100 mph.
   To my way of thinking silicon is good stuff if one is not panic
   stopping often from high speeds.

   Stephen Nelson

   [1]SNClocks.com

   Click here to join one of our mailing lists [2]Contact Lists

   Click here for our new [3]Hammered Dulcimers galleries

   Click here for [4]my new blog on finding happiness in retirement

   _______________________________________________________________________

   From: jderyke at aol.com [mailto:jderyke at aol.com]
   Sent: Thursday, July 03, 2014 12:23 PM
   To: steve at snclocks.com; detomaso at poca.com
   Subject: Re: [DeTomaso] Seals

   Two problems with stock clutch slave cylinders. First, they are made of
   some sort of pre-rusted iron. Pits form immediately even in the box.
   Second, when you hone out the pits that tear up seals, the resulting
   bore is often either too oversized for new replacement seals to fit, or
   the honed bore becomes cone-shaped front-to-back. So the repair usually
   leaks within a week. And since the clutch hydraulics wear out as a
   system, fixing the slave often causes a matching master to begin
   leaking.
   The REAL Fix is to find a slave (or master) that does not instantly
   corrode: hard-anodized aluminum or a steel or brass liner pressed in a
   stocker. This has been a problem since the Pantera was still in
   production. All the above 'fixes' applies to clutch masters too. Some
   originality-freaks use silicone fluid in non-leaking clutches only.
   Clutch pressures are low enough so the stuff works half-way-decently on
   the street, unlike in brakes. But I wouldn't drive Silver State events
   with silicone fluids anywhere in my car.

   -----Original Message-----
   From: Stephen Nelson <steve at snclocks.com>
   To: detomaso <detomaso at poca.com>
   Sent: Thu, Jul 3, 2014 11:22 am
   Subject: [DeTomaso] Seals
   Got to the point I needed seals for the clutch slave cylinder on 5332.
   Talked to Dennis at my favorite supplier - Panty Perf - he doesn't
   carry.  So, tried a couple of seal outfits here in Portland.  Unanimous
   opinion - people don't carry seals any more, but one shop did manage to
   find a 1 inch piston that would go in, and all I would have to do is
   turn a different cup on the end that the rod goes into.

   So, being from OKC - I called Sealco in OKC.
   [1][5]http://www.sealcompany.com/  God bless Sealco.  I used to live in
   OKC - needed any kind of seal they had it.  And yup, like $3.30 each -
   no problem.

   Youse guys need seals - Call Sealco!

   Stephen Nelson

References

   1. [6]http://www.sealcompany.com/

_______________________________________________

Detomaso Forum Managed by POCA

DeTomaso mailing list
[7]DeTomaso at poca.com
[8]http://poca.com/mailman/listinfo/detomaso_poca.com

References

   1. http://www.snclocks.com/
   2. http://fs19.formsite.com/kagforms/form675003155/index.html
   3. http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
   4. http://www.perfectoldman.com/
   5. http://www.sealcompany.com/
   6. http://www.sealcompany.com/
   7. mailto:DeTomaso at poca.com
   8. http://poca.com/mailman/listinfo/detomaso_poca.com