[DeTomaso] Stubbon Heater valve removal

[Christopher Kimball]

I ordered what I thought was the correct O ring from a place in Canada.  After waiting four or five months for it to arrive, I finally gave up and replaced the valve with a NOS unit that fit, I believe, a 1971 or '72 Javelin (when the O ring finally arrived, it wasn't the right one).  I had to use rubber hose and hose clamps to attach the new valve to the copper tube coming down from under the dash, pushing up the nut out of the way and not using it.  The nut's angled surface did not seat with the AMC unit, even though it appeared as if it would (don't ask me how I found that out!)

The system has worked fine for the last couple of years, although replacing the O rings in the original valve would have probably been easier.

Sincerely,

Chris



> Date: Sun, 12 Jul 2009 21:13:32 -0700
> From: asajay at asajay.com
> To: detomaso at realbig.com
> Subject: [DeTomaso] Stubbon Heater valve removal
> 
> I got the heater valve removed today.  Earlier in the day I took a small 
> thin woven shop towel and soaked a four inch strip with some penetrating 
> oil.  I wrapped it around the joint and did other odd jobs for a couple 
> of hours.  Coming back, I made sure I had a good grip on the valve and 
> attempted to turn -it- instead of the threaded fitting on the copper 
> line.  It came loose beautifully with a little nudge of torque.  Once 
> loose it came apart smoothly.
> 
> Off to the bench where I took it all apart, cleaned and re-assembled 
> it.  It moves very smooth now, almost too smooth.  I'm worried the 
> o-ring isn't going to seal the cylinder anymore.  The o-ring was in good 
> shape, but maybe it's a little shrunk.  It offered no resistance when 
> re-assembling.
> 
> Has anyone had luck sourcing a new o-ring for the heater valve locally, 
> like at Napa?
> 
> Thanks,
> Asa Jay
> 
> Asa Jay Laughton, MSgt, USAFR, Retired
> 
> & Shelley Marie
> Spokane, WA
> 
> 1971 Mach I Mustang  [ASA JAY]
> 1973 Pantera L 5533  [ASASCAT]
>     
> ******************************     
> http://www.asajay.com
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> 
> 
> 
> JDeRyke at aol.com wrote:
> > In a message dated 7/10/09 10:05:31 PM, asajay at asajay.com writes:
> > snip.....
> >   
> >> - I can't get the heater valve removed.  It seems stuck tight to the 
> >> fitting.  I'm afraid of breaking the copper tubing that disappears into the 
> >> heater box.  Advice?
> >>
> >>     
> > Can you back-up the wrench on the valve so ALL the applied torque is taken 
> > up in a second wrench on the heater line nut? 'Cause if not, the line WILL 
> > crack, forcing the removal of the dash, heater box and heater/A/C cores 
> > before you can replace or repair it. If its that tight, you may want to either 
> > leave it alone and wait for expert help, or try rebuilding the valve in-place 
> > (which can be done if you're flexible enough and have the required tiny 
> > o-ring). I can't think of another reason to remove the valve. Good luck- J 
> > Deryke
> >
> >
> >
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