An overheated engine is one of the most serious auto repair issues you can encounter while driving. Even if it is too hot for only a few minutes, the extreme heat can cause permanent damage to the engine. While identifying the exact cause of overheating can be difficult, finding the source is the best way to protect the vehicle. Here are some common causes of this issue.

Why Does a Car's Engine Overheat?

1. Faulty Water Pump

Water pumps push coolant through the cooling system regularly so that the fluid can absorb the heat generated by the engine. After absorbing the warmth, the pump pushes the liquid into the radiator so that the heat can be released safely. When the water pump malfunctions, the flow of coolant is uneven, preventing it from regulating the engine temperature. Over time, this device can wear out or develop rust and corrosion, leading to its failure. 

2. Insufficient Oil

auto repair

Motor oil also plays an integral role in cooling the engine and lubricating the moving parts, helping you avoid major auto repairs. Without this lubricant, metal components can scrape against each other and generate considerable friction and heat. By reducing friction, the internal temperature is lowered. Therefore, if your oil level gets too low, heat can build up and create an environment for the engine to become too warm.

3. Malfunctioning Radiator

The radiator is responsible for removing heat from the coolant so that the fluid can circulate back through the system and repeat its cycle. However, this component is vulnerable to damage after an accident because it is located directly behind the vehicle's front grille. It can also develop rust over time, leading to small holes and cracks. These gaps prevent the radiator from releasing heat properly.

4. Contaminated or Leaking Coolant 

For the coolant to work properly, it must be free of rust, corrosion, and other debris. Additionally, the reservoir must be full, as low levels of this fluid prevent it from absorbing enough heat. When the coolant collects too many contaminants, it cannot absorb or release heat properly, trapping the warmth in the vehicle. Also, since the coolant travels through a variety of hoses, valves, and reservoirs, any of these components can form a leak. This would leave an insufficient amount to draw heat away from the engine.


If your car's engine is overheating, contact Mullanphy Tire & Automotive in Florissant, MO. Since 1990, this locally owned and operated auto repair shop has been delivering high-quality workmanship at competitive rates. They have a team of ASE-certified technicians that use the latest equipment and technology to resolve your auto repair issues efficiently. Call (314) 921-4961 to schedule an appointment, and visit them online to learn more about their services.