- 2/4/2025
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Overheating is one of the most important malfunctions that affect the engine, and sometimes the rise is due to a simple malfunction that does not require time or a lot of money to fix, and other times it is due to a major malfunction that may cause damage to it and damage the internal parts in it.
This is why you should always pay attention to engine maintenance and monitor the temperature permanently, especially if your car is old or has previous engine failures or previous repairs, because detecting engine overheating from the beginning will facilitate the repair process and avoid paying large sums of money later.
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Read more: Overheating engine symptoms
What are the causes of overheating?
As for the causes of engine overheating in a car, we will present them to you below:
Low coolant
Most cars, especially modern ones, contain a coolant that is antifreeze, which is characterized by freezing at a lower temperature than water and contains elements and components that prevent overheating, maintain engine performance and prevent deposits, and therefore, it works better than water in cold weather conditions or in all weathers, and the decrease in its quantity within the cooling system will contribute to raising the engine temperature because the cooling process will not take place efficiently.
Low engine oil
All car engines must contain their own oil in order to lubricate the moving parts and prevent them from rubbing together, in addition to cooling or withdrawing heat from the engine and helping to cool it with the cooling system, and when the amount of oil decreases, the lubrication will not be complete and will not cover the parts efficiently, and here its temperature and engine temperature will rise, and the less the amount of oil, the higher the heat will be.
Excessive load or pressure on the engine
When you drive your car uphill on a steep road, when pulling heavy loads or even when driving continuously in traffic jams, you put more load or pressure than usual on the engine, and when it tries to compensate for the energy lost from this load or pressure, its temperature may rise, especially in old cars or those that lack proper regular maintenance, or when there are issues with the cooling system.
Read also: What Happens If You Don't Change Your Engine Oil?
Damaged radiator fan
The cooling system fan or the radiator fan works to pull outside air through the radiator to draw heat from the coolant before it returns to the engine to draw its heat and cool it, and if the fan stops working due to a malfunction, the coolant will not cool as it should and will return to the engine at a higher temperature, which will increase its temperature and illuminate the check engine light.
Faulty thermostat
The function of the thermostat in the car is to regulate the movement of the coolant, it allows the fluid to exit the engine when the engine warms up at a certain temperature, so it stays closed most of the time, especially when the engine is cold, and if the thermostat is damaged and remains closed, the coolant temperature will rise a lot and the engine temperature will definitely rise with it.
Damaged water pump
The water pump, pumps the coolant through the system to cool the engine, and if the pump is worn out or damaged, it will not be able to pump water or coolant sufficiently, and as we mentioned earlier that when the engine gets a small amount of coolant, its temperature will definitely rise, and this reason is one of the most common reasons for overheating the car.
Read also: How do you maintain the engine oil?
Damaged or clogged radiator
The radiator contains many small fins that work to dissipate the heat of the fluid, and over time these fins can become clogged due to dirt and dust, which limits the flow of air through these fins and this reduces the efficiency of cooling, which leads to an increase in engine temperature, and this may happen if the radiator is damaged or clogged internally, which in turn will raise the engine's temperature as well.
Head gasket damage
The head gasket is located between the head and the lower block and its function is to prevent the leakage of coolant and oil to the outside, and when it is damaged due to improper maintenance or a sudden increase in engine temperature, it will not be able to keep the oil and coolant inside the engine and this will raise its temperature a lot and may damage the engine head.
Engine Problems
There are many different engine issues that can cause your car to overheat, from issues with the belts and hoses that control the flow of air and coolant to and from the engine, to a clogged heat exchanger, so if you notice that the temperature indicator on your dashboard has gone up, you should determine the cause before you start making unnecessary repairs.
