New Mitsubishi fan clutch last summer, so I doubt that's it.

Radiator rodded at 170,000 miles - that was about 105,000 miles ago. Could be.

Idle or highway doesn't make any difference (or not much) - the only thing that seems to matter is ambient temperature. If it's in the 60's or lower it runs nice and cool.

I paid $100 for rodding last time, can't do it again right now (and wonder if the radiator would take it), looks for a "band-aid" to get me through.

Any help?

1987 Raider 2.6L Auto -- rebuilt, by hand, by me -- Bouncy Seat/LSD/Aisin Hubs -- CB/Whip Antenna --Jensen Stereo -- Fire extinguisher .