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Paul, to the best of my knowledge, none of the GM
cores from the older vehicles had epoxy. Since the burst pressure for an
evaporator core is much higher than for an automobile radiator, I would be
surprised if they are using epoxy - but, I guess they could be on the more
recent models, I don't really know.
I do know that because the side tanks are
corrugated that it is very easy to nick the inside of the corrugated rib
drilling to enlarge the tube entrance hole. So I recommend a flat faced
end mill be used for that purpose. You can use a regular drill - but be
very careful not to let the drill go more than 1/8" in after the widest part of
the drill penetrates. I lost several cores before I figured it
out.
----- Original Message -----
Sent: Tuesday, December 16, 2003 10:08
PM
Subject: [FlyRotary] evap cores
Hi, fellow rotary enthusiasts....(especially Ed
Anderson). Ed, I seem to recall that you have had some work done on your
evaporator cores. Ed Klepeis, who might convert an evap. core into a
radiator for me (attaching threaded fittings and mounting brackets) would like
to know if the core has any epoxy. I am considering buying the core new,
but the catalog at CarQuest does not mention wether or not there is any
epoxy. It looks just like the core from a Chevy Astro van, only
larger. In your experience, did you find there was epoxy in the evap.
cores you have encountered/experimented with? Thanks for your
input. Paul Conner
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