Overheating mess-up better now.

On Aug 9, 4:12 pm, "Joseph Wind" <j... DeleteThis @gif.com.invalid> wrote:
> The stock Toyota radiators are notorious for developing small fractures. If
> you losing that much water/coolant, it's going somewhere. Also check to see
> if your A/C fan is turning.
>
> "rigger" <dg... DeleteThis @aol.com> wrote in message
>
> news:1186679009.183085.210080@e16g2000pri.googlegroups.com...
>
>
>
> > Overheating but driving fast cooled it off immediatly.
> > (Oh, right: '94 4runner 6cyl. auto/air). Squeezed the
> > upper hose and felt flow when letting go = pump
> > might be ok. Got pricing on new fan clutch but I
> > tested it ok as well. Coolant level in overflow bottle
> > was ok BUT, then I pulled radiator cap and found I
> > was down about 1 gal.
>
> > Then remembered buying a cheap cap a while back.
> > Found the cheap replacement cap held the lower
> > cap seal so tightly there could be no flow into the
> > overflow bottle so it escaped elsewhere.
>
> > Parts dude at Toy said aftermarket caps and
> > thermostats were the biggest cause of overheating
> > in Toys.
>
> > Convinced me.
>
> > dennis
> > in nca- Hide quoted text -
>
> - Show quoted text -

I tightened a few hose clamps for good luck but couldn't find any
obvious areas which looked like they'd been leaking. The funny thing
is, I think it's taken several months to loose enough water to effect
the temp gage.

The reason I think this is that another problem has cleared-up as
well. I have a one year old AC compressor clutch that was working
well at the begining of the season but which then began to only work
(it seemed) when I was driving uphill and would stop working if I was
going downhill. Sometimes it would work ok if I was doing highway
speeds. I thought it might be something to do with the clutch but it
turns out to be an overheating AC temp sensor not driving a small AC
cut relay which looks as though it supplies power to activate the AC
magnetic clutch (through the AC amplifier).

Anyway this has been going on for 3 to 4 months and now, with the
added coolant, it works like new. This means I've been low on coolant
for all this time and never knew it. I don't think I've ever heard
about an AC problem/complaint like this before so it might be just
something about this years model???

dennis
in nca
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