have a 1993 Toyota Camry with 160K miles. In August my car temp redlined (5 people in the car, going up a hill with the a/c on), so I had the radiator checked/replaced. I also had the water pump/timing belt changed since it was about that time. 2 months later I had the power steering pump replaced because it was making noises when the car was cold or when the wheel was fully turned. I don't know if it's coincidence, but a day or two later I noticed my car was starting to run hot, but will go back down.
The dashboard temp gauge never would go above 40% up the gauge and suddenly it's going as high as 60%, but not near redlining. This really only happened in traffic, driving slow, or on hills. On the highway it was fine. Within a month, it's coming closer to redlining, more frequently, not just in traffic. The last hour of a 230 mile trip it would get a little hot (60% to red)on the highway when going uphill. I topped off the radiator AND added a little to the resevoir, however combined I may have added 10oz. of liquid MAX. The car didn't get hot for 2 days and then it went back to the same routine. It has come very close to the red, but usually drops back down just before it hits it. The problems tend to start happening after I've been driving the car for atleast 20 minutes.
Now my mechanic replaced the thermostat (and gasket), cooling fan sensor/switch, temp sensor/guauges, and added new antifreeze. However, after 2 days, it's gone above half several times again after driving the car over an hour. I'm fearing in a few weeks/days, it's going to get back into that same problem. It's never overheated, but it never acted this way before. Any ideas would be greatly appreciated.
Justin