I have a Camry 95' with 113k. It has the overheating problem. If you run it in the highway, that is fine, but when you just leave the highway, the temperature goes up. If you run it again in the highway, the temp becomes nornal again. Also, it seems that the coolant is leaking everyday.

I have change the thermostat, the radiator, the radiator cap. They have checked the fan, it is OK. it seems that it is blocked somewhere, b/v the temp is fine at high speed but high at low speed. Who can tell me what is the real problem? Thanks.