At 07:57 PM 7/7/01 -0700, you wrote:
>
> having an overheating issue while highway and high speed driving ....
van is
> fine around the city and at idle .....  once up to highway speeds temp
needle
> rises to overheating area    had heads done about 2 months ago and flushed
> coolant replaced with havoline orange new t-stat ....   just looking for a
> few ideas   maybe i am missing something?????

Sounds exactly like an air locked system to me.  That is classic
description.  Around town, even for 30 minutes or so no problems,
then boom hit the interstate and the LED goes off and needle climbs.
My first act would be drive it up a bank, pop the grille, bleed her.  If
that don't do it, I'd be thinking thermostat as a remote possibility.
But I bet it just needs bled.  Does raise some issues as to either
a shoddy job (they didn't bleed) or you got air leaks (could be about
anywhere, the level sensor or cracked tank, OR crappy hose to
overflow tank without hose clamps all good possibilities.)

John
jander14@wvu.edu