Wow, what a difference!!
I've now had time to evaluate the difference my recored, 3-row, ("high
efficiency")
core has made.
Coming up "my mountain" (Hualalai), from sea level to my house at approx. 1K
ft. in
about 10 minutes, with the accelerator floored much of the time, the temp
gauge, now
doesn't even get up to that "mark" (about 1/8" above the 120 degree indication).
Before the recore, I was flirting with the indication approaching about a 1/4"
of the
250 degree mark in doing the same thing. Seems no matter what I do now, does
it get
very hot and it's not just a matter of "indication"--from recent experience, I
know
"hot". (Tom Walter once posted a piece on how to infer engine temperature from
things like duration of time being able to touch the radiator, how "spit"
reacts,
etc. That must have been some of the wisdom lost in my hard drive crash.)
Nice to have that problem behind me, and thanks to those who contributed ideas
and
advice.
Dave
'68 1600
Kailua-Kona
"David R. Conrad" wrote:
> John: Think you and Dana Nojima both got it. Thanks!!
>
> John F Sandhoff wrote:
>
> > Another thought for you.. I think you may be on the right track
> > when you comment:
> >
> > > I'm suspecting that I may need a new or recored radiator. Several years
> > > ago when I had that "T" at the top of the radiator re-silversoldered, the
>guy
> > > at the radiator shop remarked about the deterioration of the fins on the
>front
> > > surface; said it could affect my cooling.
> >
> > If we take the optimistic side and assume nothing has broken or gone
> > out of whack lately, it could be that you've lost enough bonding between
> > the actual cores (the thin rectangular tubes) and the fins that the
> > radiator is now not dissipating the heat. The fins are what actually get
> > rid of the heat; they multiply the area of those tubes significantly. Now
> > that you restated this comment (it was in your first posting too; I just
> > didn't catch its implication), I recall discussion quite some time back on
> > this list about another owner having a similar problem.
> >
> > So yes, it's possible the pinhole leak was just coincidental; and your
> > radiator has just run out of useful life.
>
> Yep, but I don't think it was coincidental. I think it was part of a
>"cascade". I
> didn't mention that I had (very) recently needed to replace the gasket of the
> "fill" cap, because coolant was beginning to leak from that location. I
>didn't
> think it was germane because the gasket was old and cracks were appearing
>around
> the edges. After that was sealed, then the corroded "heat shield" pipe was
>the
> next to fail. After that was "bypassed", then the cooling system could build
> pressure up to the point of "lifting" whatever pressure cap, I happened to
>have in
> place.
>
> I did drain about 3 qts of coolant and replaced with water, and it seemed to
>run a
> bit
> cooler, validating that premise, but still too hot.
>
> Thanks again. And to you also, Tom!
>
> Dave
>
> '68 1600 (soon to be COOL, again)
> Kailua-Kona
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