I have an Oldsmobile Aruora that keeps overheating. I took it to a radiator mechanic and he looked at it and replaced the water pump, thermostat, and top cooling hose, and the car still overheats. What else could it be?
How many mi. Are on your car?
My overheating problem with my 1997 Aurora was because the catalytic converter was plugged up.
Check to make sure the lower radiator hose does not collapse when the thermostat opens.
If you have the original radiator. There is a good chance the entire cooling system will have a sludge build-up especially the radiator. Make sure your not using dex-cool brand antifreeze.
The head gaskets could be blown.