Why is My Engine Overheating?


If you’re driving in extreme conditions such as very hot weather, your car may heat. But this isn’t the major cause of your car overheating. There are various factors that make the car to overheat and when you detect them, you should take your car to a mechanic right away. Here are some of the reasons that may make your vehicle engine to overheat.

There is leakage in the cooling system

When there is a leak in the cooling system, it might not directly make the engine to overheat. The main cause of overheating is the air entering the cooling system. If there is a leak, the coolant level falls and air is sucked in and circulated. Since the air is lighter than coolant, the moment it rises to the top of the cooling system it causes what is usually referred to as an airlock. An airlock refers to a large bubble that can’t be pushed through the cooling system by the coolant flow. That implies that cooling system effectively halts circulating and the coolant remaining in the car engine becomes extremely heated.

Failed water pump

This is one of the main causes of car engine overheating. This is because a water pump is the most active part in the cooling system and is in charge for keeping coolant circulation. After a long time of use, the bearing or impeller in the water pump can wear or break and the impeller will cease to turn as needed. When this takes place, it is just a matter of time before the car engine starts overheating. The worn out or damaged water pump should be replaced for the engine to cool normally and stop overheating.

Blockage in the cooling system

Another cause of engine overheating is when there is a blockage in the cooling system. As a matter of fact, overheating is as a result of lack of a coolant circulation in the car engine. If the cooling system is blocked and the coolant can’t circulate to the radiator to disperse heat, the engine in turn overheats. Some of the causes of blockage are a mineral deposit that is blocking the radiator, a thermostat that doesn’t open when it should do so and a foreign object stuck in the cooling system.

The coolant isn’t concentrated enough

This usually takes place in cold weather conditions. In such places, the temperature drops below freezing. As a result, the coolant can gel up in the engine or the radiator and lead to a blockage. Even in the freezing cold, an engine will readily overheat if the antifreeze has gelled and cannot circulate. It can actually lead to internal damage in components that will demand attention, such as a possible radiator repair.

Radiator issues

If your radiator has some issues, the car engine will as well overheat. The issues can be in form of clogs, leaks or even a damaged fan. When the radiator isn’t function well, it means that the heat can’t properly escape your vehicle, which will make the temperature to rise. A professional mechanic can be in a position to check what the issue is with your radiator. If a new radiator fan is needed, they will let you know. This should be repaired for the engine to cool as needed.


If you realize that your car is overheating, check the above issues and take your car to a professional mechanic to fix it. Even though DIYers can fix some of the parts by themselves, there are some sections like the radiator fan which is very sensitive and should be fixed by a professional mechanic.


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