Why Do Cars Overheat?

Categories: Auto Blog

A vehicle engine depends on its cooling system to maintain its functioning temperature.

Nevertheless, there may be periods when the cooling system cannot work as it should, leading to overheating.

The car overheating problem is one of the most serious issues. If the engine gets excessively hot, it may start to warp and crack, causing irreversible overheated engine damage.

However, what are car overheating causes? We will talk about four potential reasons below.

What Causes A Car To Overheat?

There are numerous reasons that can cause the engine to overheat. Here are the four most common engine overheating causes.

  • Damaged Radiator

The coolant benefits run through the radiator after absorbing warmth from the engine.

The cooling fan of the radiator brings down its temperature by permitting the coolant to transmit the heat to the environment.

If the radiator fan is not working appropriately, it decreases the coolant’s cooling efficiency.

This issue may manifest due to the electric motor’s mechanical failure that runs the cooling fan.

  • Broken Belts

The belts play a key part in determining heating problems in cars.

If your vehicle’s drive belts are broken or loose, be ready to witness the car overheating when idle.

A damaged belt can’t maintain the right amount of coolant flow.

  • Faulty Thermostat

The thermostat works like a valve that controls the volume of coolant that comes into the engine.

If the thermostat valve does not operate as it should, the engine might not be acquiring sufficient coolant, which will lead to your car overheating when driving.

In addition to overheating, symptoms of a defective thermostat include coolant leaks beneath the automobile and recurrent temperature instabilities.

You should inspect your thermostat if your engine temperature light comes on and off often.

  • Low Engine Oil

Engine oil offers lubrication and aids in reducing excess engine heat. If your vehicle has low engine oil, it can cause too much engine heating.

What Are The Signs Of A Car Overheating?

If left unaddressed, a car overheating problem in Ontario, Canada, can cause permanent damage.

Therefore, you must examine your automobile if you notice any symptoms of overheating.

Here are the common signs of car overheating:

  • An unpleasant or burnt smell from the engine. A burnt odor is a symptom of leaking oil. Leaking radiator coolant has a sweet smell.
  • White smoke rose from the engine bay.
  • The temperature gauge on your car dashboard rises above the regular temperature. Some vehicles have temperature light that activates when the temperature rises above normal.

How To Stop Car From Overheating?

Follow these tips to stop your car from it:

  • Park your vehicle in the shade to keep it cool and increase its lifespan. Alternatively, use a sunshade to decrease heat inside the automobile.  
  • Apply window film or tint to keep your car cool and provide ultraviolet ray defense against sun damage.
  • Set your AC on fresh air for at least 10 minutes.
  • Cover your seats and steering wheel with a blanket, towel, or steering wheel and seat covers to keep your car interior cool.


Now that you know what causes car overheating when driving and how to stop it, we hope you will be ready if it ever happens to your vehicle.

Besides, if you want to sell your old automobile and earn money, contact Schneider’s Auto Wrecking Ltd.