Quote Originally Posted by Dan in NZ
Sounds like you're having flow problems... When you say the radiator is fine, what do you mean? Have you had it flow tested to make sure it's not blocked?

Is your coolant expansion tank attached to the radiator, or seperate next to the firewall? If it's near the firewall, the line between radiator and tank can clog causing overheating.
If it's the original radiator, it might be time to replace it. I was having cooling problems and decided to overhaul the cooling system. New radiator, water pump, thermostat, hoses and belts. It was under $400 in parts and we did it ourselves. No more cooling problems.