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Why Is My Car Overheating

Why Is My Car Overheating


If your car is overheating and there are no obvious leaks, the oil level is okay, and the cooling system is properly filled, there can be several potential reasons for this issue. Here are some of the most common issues:

A Malfunctioning Thermostat: A malfunctioning thermostat can prevent the proper flow of coolant through the engine, leading to overheating. If stuck in the closed position, it obstructs the circulation of coolant.

Engine/Radiator Cooling Fan Problems: The radiator cooling fan helps remove excess heat from the engine. If the fan is not working correctly or fails to turn on when needed, it can result in overheating. It is important to check for proper operation of the fans(s) and any associated components.

Radiator Blockage: An obstructed radiator will hold back the flow of coolant, causing the engine to overheat. Whether caused by debris or internal buildup, flushing the radiator and cooling system may help to resolve this issue.

A Failing Water Pump: An Engines water pump is responsible for cycling coolant through the engine. A malfunctioning water pump can lead to insufficient coolant flow and overheating.

Trapped Air in a Cooling System: Air bubbles trapped in a vehicles cooling system can disrupt the flow of coolant, and cause overheating problems. This is pretty common and is usually caused by adding fluid to a cooling system that is low. The coolant sits on top of the air bubble, creating pockets of insufficient coolant flow which causes overheating. Some of these systems can be very troublesome to  remove the air from or "burp", but is necessary to restore cooling system functionality.

Faulty Temperature Sensor: Symptoms can be anything from black exhaust smoke to poor engine idling or even degraded fuel mileage. When a temperature sensor is malfunctioning it can not accurately gauge the engine's temperature, leading to chaos in the cooling system. 

Blown Head Gasket Issues: A blown head gasket can result in the mixing of coolant and oil, causing overheating and serious engine damage. Have a professional, like One Stop Automotive check for signs of coolant contamination in the oil or vice versa.

If you notice steam coming from under the hood, it's crucial to address the issue right away to prevent any engine damage. Continuing to drive a overheating vehicle will lead to costly repairs.

A vehicles cooling system is very complex and it's often recommended to have your car inspected by a qualified mechanic. At One Stop Automotive we can perform diagnostic testing. We can check the vehicles cooling system components and isolate the origin of the overheating issue. 

Finding the issue early can prevent expensive damage and ensure the reliable performance of your vehicle. Thats why One Stop Automotive performs a courtesy inspection on every vehocle so we can help prevent these issues.