Hey guys, I posted a while back about an overheating problem. My 89 Suburban
was purchased in the spring. It warms and idles fine but at speeds of 40mph+,
even while cruising, it will jump in temp from 180-190 to 260+. It stays maxed
for a few secs then returns to normal operating temp. It'll stay at that temp
for a few secs then jump all the way up again. This temp jump stops at red
lights etc. and the engine idles just fine. I have overflow of coolent, but
just a little at a time. I changed the stat to a Stant 190 degree and have the
Now, I noticed some crud, like a twist tie, for example, in the coolant
resevoir when I added coolant the first time. Could something be pluging the
water pump or radiator? And how the f*** would someone get a twist-tie ing with
it sounds more like the wire to the temp sender is shorting against the
block or exhaust
if it doesn't overheat at idle at lights, when airflow and water pump
efficiency is lowest, I doubt there is a REAL problem
as for the 'stuff' in the coolant reservoir, who knows ?
Similar problem, looked in the archives and found a couple of questions
but no answers: 91 S10 Tahoe Pickup, warms & idles fine, on acceleration
the "Check Gages" light comes on and the temp gage pins at max for a
second or two, then drops back down to operating temp. Very little
coolant overflow, and this ONLY happens when accelerating in gear, does
NOT happen in neutral or park.
Thermostat? Temp Sensor? something more sinister and evil?
I second that recomendation.. I had a 64 Valiant once, couldn't figure
out what was maiking it overheat on the road. It would run just fine
idling all day in 100 degree weather. Didn't fix it until I noticed one
day that when I reved the engine at the carb, I noticed a movement in
front of the radiator. Did it again and noticed the lower radiator hose
collapsing. Removed it and saw that the spring that is supposed to keep
it from collapsing was rusted away. New hose no problem.
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