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Car Engine Overheating: See 6 Common Causes and How to Avoid Damage

Written by Ruth Rodrigues
Published on 29/07/2025 at 10:53
Motor do carro esquentando reflete o estado do veículo. Ao entender a causa do superaquecimento, é possível evitar problemas irreversíveis. Fonte: Canva
Motor do carro esquentando reflete o estado do veículo. Ao entender a causa do superaquecimento, é possível evitar problemas irreversíveis. Fonte: Canva
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Car Engine Overheating May Indicate The Well-Being Of Your Vehicle. It Is Important To Understand The Cause Of Overheating And How To Act To Avoid Irreversible Problems.

You are driving and suddenly notice that the temperature gauge is rising too fast. This is one of the clearest signs that the car’s engine is overheating. Ignoring the problem can be costly since overheating can compromise essential parts and even render the engine useless.

Why Overheating Is Dangerous

When the temperature exceeds the safe limit, excessive heat can deform internal components, damage gaskets, and compromise the entire system.

It’s like turning your car into a pressure cooker on wheels. Understanding the causes is the first step to avoiding losses.

6 Common Causes For Car Engine Overheating

1. Low Or Leaking Coolant

The coolant keeps the engine at the proper temperature. If the level is low due to lack of replenishment or leakage, heat exchange fails.

Be attentive to the car's coolant.

Source: Canva

Leaks can occur in the radiator, hoses, or water pump. Always check the reservoir and look for fluid stains under the car.

2. Faulty Radiator Or Fan

The radiator cools the fluid, and the fan ensures that the thermal exchange works even when the car is stopped.

Clogs, accumulated dirt, and failures in the fan or sensors can prevent proper cooling.

Regular cleaning and testing of the fan can prevent unpleasant surprises.

3. Water Pump Issues

It circulates the fluid through the engine. If it breaks or shows wear, circulation stops, and heat does not dissipate. Strange noises and leaks around the pump indicate a defect.

4. Stuck Thermostat

This component controls the flow of fluid to the radiator. If it gets stuck closed, the water does not circulate, and overheating is immediate. One sign is a cold radiator even when the engine is hot.

5. Damaged Or Loose Belt

The belt that moves the water pump can wear out, loosen, or break, stopping the cooling system. Frequent inspections and timely replacements can prevent this problem.

6. Improper Coolant Use

Using only water or mixing it in incorrect proportions reduces the system’s efficiency. Tap water causes rust and clogs.

Always prefer the correct coolant mixed with distilled or demineralized water.

Can You Use Just Water In The Radiator?

In emergencies, water can save the engine, but only for a short time. It lacks additives that raise the boiling point and prevent corrosion.

Although it's a temporary solution, water will not solve your car's overheating in the long run.

Source: Canva

If you need to use it, replace it as soon as possible with the correct fluid and clean the system.

When To Seek Help?

If the dashboard needle indicates high temperature, smoke is coming from the hood, or the car is losing performance, stop immediately.

Do not open the hot radiator to avoid burns. Wait for it to cool down and consult a mechanic.

With information from Olhar Digital.

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Ruth Rodrigues

Formada em Ciências Biológicas pela Universidade do Estado do Rio Grande do Norte (UERN), atua como redatora e divulgadora científica.

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