One potential culprit is electric fan failure, preventing sufficient air flow when the car is traveling at a low speed or idling. Another very common issue is a broken thermostat. While it is not actually a part of the radiator, the thermostat controls how much coolant flows into the radiator based on the temperature. A leaking hose allows coolant to escape, creating overheating and a radiator-related problem. Likewise, an ailing water pump disrupts the flow of liquid through the system. If air becomes trapped in the system, the cooling system cannot operate optimally, nor will it work well if the passages in the engine block or radiator become blocked with "scale." And, of course, the radiator itself can develop holes or cracks, allowing fluid to escape. These leaks are often harder to see than those located along the hoses.
Fortunately, the experts at Friendly Auto Centers in Mesa, Arizona, can detect and repair these problems or replace the radiator, if necessary. Call us at 480-830-9377 to schedule an appointment to put an end to your vehicle's overheating woes.