Engine Overheating Diagnosis Cost
You should not drive a vehicle with an engine that is running hot or overheating. The engine damage from overheating can be severe, so at the first sign of overheating, get the vehicle in to the shop to have it diagnosed. If it means having it towed, then do so. It will be much less expensive than a new engine!
Regular inspection of the coolant hoses and water pump drive belt, and periodic replacement of the coolant thermostat, can help prevent engine overheating.
Whenever an engine has been overheated, there's a possibility the head gasket has been damaged. Therefore, as part of this diagnosis, it's important that the shop checks for signs of a leaking head gasket before recommending or replacing any parts.