This post is regarding the "odd cooling system problem," post of
I have not had the "wanting to overheat," problem the last few days.
Its been cold, don't know why. I found out maybe because I took a
chance. Allowing for deviation in the heat gauge to as much as + or -
30F, I let the thing rise without turning on the blower and heater.
[Which I thought, before, maybe made it start to cool down]. Engine
temp made it half way between 210F [normal op temp], and
260F, [redline], and went back down on its own. If the gauge is
off -30F, that would mean
it could have gotten to an actual temp of 240F, before it started to
go down. Personally,
I think thats definately too hot to run this [4K miles], 2.8 V6.
After reading what Gary said in reply to my first post, I searched for
contacts for Wynn's
Austrailian and US websites for contacts. Though half of the email
addresses I could find for them bounced, I did get a reply from an
engineer, employee of Wynn's. In fact, several replies, after the
question I questioned till I got some understanding. I commend them
for that, and this group for your comments. Here is what the man
"With regards to your thermostat sticking while the car is warming up
there can be many reasons here, there are a few like a failed head
gasket, retarded valve timing, or perhaps there could be a build up of
scale in the engine block and it may be in need of a chemical flush
all these problems can cause a motor to run hot which in turn will
cause air to settle under the thermostat and prevent it from opening,
especially on start up."
I questioned a little more, and he said this:
" a failed head gasket at the combustion ring may cause a thermostat
to stick because the clamp load between head and block is less when
cold therefore you may have combustion pressure leaking into the
cooling system when cold which in turn allows air to collect under the
thermostat preventing it from opening."
Well,...bad as I hate to admit it,... that made some sense to me,
thought it may have been worth sharing, so there you go. [I still
hope it ain't true]! The head gasket I mean.
What about putting mechanical gauges in this, , truck after the
flush? At least for water temp and oil pressure. Would I get more
accuracy and maybe some dire prevention?
Also, if someone already suggested these possible scenarios to my
earlier post, I apologize. I know that I don't get all posts in this
or any other group, using my ISP's freebie cheap corp account.