A car engine

Common Causes of Overheating Engine

An overheating engine is often a cause for alarm since it usually points to more serious issues with a vehicle. Faulty cooling systems prevent heat absorption, transportation, and release, causing an engine to overheat and malfunction. If ignored, drivers may end up paying for significant repairs. Here are some common reasons for overheating engines.


If there are leaks in the radiator, water pumps, or hoses, the engine will have trouble cooling down. Checking and sealing leaks helps the engine cool properly, reducing the chances of overheating. In addition, dirt and road sediment can enter a car’s cooling system and cause blockages. Blockages prevent the seamless flow of fluids in the cooling system, which can also cause the engine to overheat, leading to stalls when driving.

Coolant Issues

Engines require a specific coolant-to-water ratio to cool off properly. Using the wrong coolant or an improper mix can cause motor issues. Many vehicle owners may also be unaware that coolants with contaminants may not absorb enough heat. A mechanic can flush the system and follow the recommendations in the owner's manual to add the appropriate coolant.

Radiator Problems

Leaks or clogs in the radiator can prevent heat from escaping the engine, leading uncontrolled temperature spikes. A mechanic can also diagnose issues with the radiator fans and recommend possible solutions. To ensure proper airflow, filters should be replaced regularly.

Broken Water Pump

A vehicle’s cooling system relies on the water pump to propel engine coolant throughout the system. The water pump drives the coolant flow rate as it circulates water. Eroded impeller vanes or pump leaks often lead to an overheating engine, which could leave the driver stranded on the side of the road. Shifting of the pump shaft can also impair the cooling system’s efficiency.

Faulty Thermostat

When the engine gets too hot, the thermostat signals the cooling system to monitor the engine's temperature. The thermostat then allows the coolant to enter the engine. A faulty thermostat won’t detect temperature changes and can lead to boiling coolant or blowing cylinder heads.

Broken Belt

The belt maintains proper coolant flow as it ensures that the pump is rotating at appropriate speeds. Loose or broken belts can also interfere with seamless coolant flow. With faulty or inconsistent belt function, car engines will receive inadequate coolant and a piping hot engine.

Sometimes, an overheating engine catches you by surprise at the worst moment. After finding yourself stuck without transportation after engine troubles, call Troyz Towing & Storage to help get you back on the road. We've provided reliable towing in Jacksonville for over two decades, and even offer motorcycle towing services. Call 904-712-1804 for emergency towing and 24/7 roadside assistance.