Randolph <trash@junkmail.com> wrote in message news:<40026859.E75362F0@junkmail.com>...
> From your description it sounds like the car is cooling down when you
> are going fast and heating up when stopped or in stop and go traffic. If
> that is the case, most likely your radiator fan does not run, either
> because the fan is bad or because the thermoswitch that turns on the fan
> is bad. Do you ever hear the fan turn on?

No, the temp going up and down is not related to speed. It can heat up
when I am going down a major hill out of the mountains. That's why I
suspect it's the thermostat. Also, fan comes on and stays on when I
put the A/C on. Even with the fan running, however, the temp gauge can
still head north, just to come down a few minutes later. Again, I am
thinking the thermostat is sticking and the coolant can't get back to
the radiator to cool. Thus my quest to see if this could be the case
from the gurus...

I do want to replace the radiator as well so there are no surprises
later...