[DMCForum] Re: Bill R's clutch master cylinder X-ref:

["cruznmd" <racuti1@xxxxxxxxxxxx>]

Thanks.

I am just not willing to rebuild mine. I haven't had a leak yet from 
any hydraulic part I've replaced on the D, but every past piece I've 
rebuilt blew out soon after.

Not gonna do it.

--- In DMCForum@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> 
wrote:
> Cylinders are identical. I have one of each (Juley's not the only 
one
> with an AMC). Compared them side by side. Even the part number cast
> into the cylinder is the same. I'm more certain of this than I am of
> importance of low RPM torque over high RPM "horsepower" (what an
> illusory measurement, since torque is one of the required variables
> necessary to calculate HP!).
> 
> DeLorean clutch master uses 1/4" SAE (Society of Automotive 
Engineers)
> hydraulic fittings. When I blew the piston out of my old one 
(rebuilt
> it, with an AMC kit thank you very much, rather than replace because
> the big Autozone warehouse was out of them at that time. They're 
back
> in stock now), I used an SAE plug to cap off the outbound port. Of
> course it threaded in and sealed perfectly.
> 
> Note that AMC used a different clutch master on the 6 cylinder. That
> reservior is built in, not remotely located. Don't think one of 
those
> would fit.
> 
> The pedal linkage is of course proprietary to DeLorean. You'll have 
to
> transfer your old one to the new cylinder. Even if you rebuild it, 
the
> linkage has to come off. No big deal -- has a big knob sandwiched
> between the piston and a washer/lockring into the cylinder. Squeeze
> the lock ring and it falls right out.
> 
> AMC used a steel hydraulic line to the reservior, so you'll need to
> transfer DeLorean's 3/8" hose barb too. Again no sweat. Mine turned
> off a bit too easily for my tastes.
> 
> Be careful with the brake hone. The rubber seal on the piston ain't
> hittin' on much. Take off too much material, or oval shape the
> cylinder, and it won't ever work right again. Made that mistake 
when I
> first rebuilt my AMC's back in the 1980's. Am now running a parts
> house replacement (CarQuest, which doesn't list it anymore), rebuilt
> one more time with the BrakeWare kit. I just clean the cylinder out
> with solvent, flush it REAL well with brake fluid, then reassemble
> everything with the new rubber (that's all you get in the $15 
rebuild
> kit -- 2 pieces of rubber and a wave washer. Oh, they do give you a
> new cap and seal for the end -- have fun stretching it over the 
washer
> that holds the pedal linkage!).
> 
> Regarding thread patterns: you've got a smorgasborg to choose from:
> - UNF (also known as "air brake". UNF-A is male and UNF-B is female,
> if I remember correctly. Sizes match actual pipe diameters)
> - NPT (this is the one plumbers use, especially fun because the pipe
> sizes DO NOT match actual pipe diameters -- 1/8" NPT is something 
like
> 3/8" actual. Comes tapered and untapered)
> - SAE 45 degree (most automobile hydraulic systems. Diameter is of
> course tube, not fitting itself)
> - JIC 37 degree (same TPI and diameters as SAE, but the flare is
> different and won't seal)
> - BSPT (British version of NPT. Pipe sizes are the same, but TPI is
> *ONE* thread greater!)
> - Compression -- same TPI as one of the above, but diamters are
> different. Doesn't really matter because they won't seal without 
their
> own special ferrules.
> 
> Then there are the European patterns...
> 
> Bill Robertson
> #5939
> 
> >--- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote:
> > Bill says:
> > 
> > "If anyone's interested: 1981 and later AMC
> > Spirit 4 cylinder (151 inch) clutch master cylinder is 100% 
identical
> > to DeLorean (transfer your old pedal linkage and reservior hose 
barb).
> > $79.95 at Autozone.
> > 
> > Bill Robertson
> > #5939"
> > 
> > My question:
> > 
> > Is the master cylinder threaded for an imperial or metric 
hydraulic 
> > line fitting? An American car that old probably didn't use metric 
> > hardware. The cylinder may be identical, but it might have been 
> > tapped for a non-metric fitting.
> > 
> > Am I making any sense?
> > 
> > Rich A.
> > #5335

---

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