I had a similar problem. No apparent leak, ran hot, everything was working
correctly.
Radiator cap fixed it.
"Julian87" > wrote in message
ups.com...
>I have a '98 dodge stratus. Recently I added in new coolant, but when
> driving in hot weather ( I live in Miami, FL) and heavy city traffic,
> the temperature gauge goes up (not all the way). But when driving in an
> expressway it goes back to normal.This car has NO leaks Any ideas?
> e-mail response to
>