[DeTomaso] Pantera heating

[jderyke at aol.com]

Fred, what often happens with unmodified expansion tanks is, the tanks were built for European rad caps which are a bit longer than any U.S. cap. So a brand new U.S rad cap will seal for a while, but the rubber seal in the cap rapidly ages & gets stiff. So it no longer seals as well. In addition, the contractor that built those tanks often did a rough, porous solder job on the bottom of the necks where they attach to the tank body, so they often don't seal  very well.

One fix we've found over decades is to take the small expansion tank to a radiator shop & have the neck unsoldered, and a new US made tank neck carefully resoldered on. Then a maximum 16psi U.S-made cap will fit, seal and last. Cheap, easy fix if you're using a stock tank. Note- most radiators stock and aftermarket, of any materials, will hold 16-17 psi but higher rated racing caps can balloon the rad core if they develop full pressure. Stock cap was rated at 0.9 Bar- about 13+psi. Good luck- J DeRyke


-----Original Message-----
From: Fred Sweeney <fred at creekspeak.com>
To: detomaso <detomaso at server.detomasolist.com>
Sent: Mon, Jul 23, 2018 1:10 pm
Subject: [DeTomaso] Pantera heating


My car displays about 185 degrees on the gauge, but after I drive it for
a while, it seeps out of the radiator cap closest to the engine.
Background: I drove the car in 90 degrees weather but it was at a
reasonable highway speed for about 40 minutes. Virtually no city stop
and go. After things cooled down I drove for about 10 minutes and no
trouble this time.

I have the overflow tank next to it filled about 1/2 full. I measured
the tank so not to overfill. It was filled while the engine is hot. I've
read both versions of filling it. Think this is the right version. Other
than that, the car runs fine. ANY IDEAS? Please email me because I'm
really not good on computers. fred at creekspeak.com

Thanks in advance to all the Pantera gurus who have always helped me.
Fred Sweeney



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-------------- next part --------------
   Fred, what often happens with unmodified expansion tanks is, the tanks
   were built for European rad caps which are a bit longer than any U.S.
   cap. So a brand new U.S rad cap will seal for a while, but the rubber
   seal in the cap rapidly ages & gets stiff. So it no longer seals as
   well. In addition, the contractor that built those tanks often did a
   rough, porous solder job on the bottom of the necks where they attach
   to the tank body, so they often don't seal  very well.
   One fix we've found over decades is to take the small expansion tank to
   a radiator shop & have the neck unsoldered, and a new US made tank neck
   carefully resoldered on. Then a maximum 16psi U.S-made cap will fit,
   seal and last. Cheap, easy fix if you're using a stock tank. Note- most
   radiators stock and aftermarket, of any materials, will hold 16-17 psi
   but higher rated racing caps can balloon the rad core if they develop
   full pressure. Stock cap was rated at 0.9 Bar- about 13+psi. Good luck-
   J DeRyke
   -----Original Message-----
   From: Fred Sweeney <fred at creekspeak.com>
   To: detomaso <detomaso at server.detomasolist.com>
   Sent: Mon, Jul 23, 2018 1:10 pm
   Subject: [DeTomaso] Pantera heating
   My car displays about 185 degrees on the gauge, but after I drive it
   for
   a while, it seeps out of the radiator cap closest to the engine.
   Background: I drove the car in 90 degrees weather but it was at a
   reasonable highway speed for about 40 minutes. Virtually no city stop
   and go. After things cooled down I drove for about 10 minutes and no
   trouble this time.
   I have the overflow tank next to it filled about 1/2 full. I measured
   the tank so not to overfill. It was filled while the engine is hot.
   I've
   read both versions of filling it. Think this is the right version.
   Other
   than that, the car runs fine. ANY IDEAS? Please email me because I'm
   really not good on computers. [1]fred at creekspeak.com
   Thanks in advance to all the Pantera gurus who have always helped me.
   Fred Sweeney
   _______________________________________________
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   Posted emails must not exceed 1.5 Megabytes
   DeTomaso mailing list
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   use the links above.
   Members who post to this list grant license to the list to forward any
   message posted here to all past, current, or future members of the
   list. They also grant the list owner permission to maintain an archive
   or approve the archiving of list messages.

References

   1. mailto:fred at creekspeak.com
   2. mailto:DeTomaso at server.detomasolist.com
   3. http://server.detomasolist.com/mailman/listinfo/detomaso