After angrily asking Siri or Alexa “Why is my engine overheating?”, have you reached this page? Sorry to hear this news dear reader, but please keep reading to find out the possible causes, and the most important thing is how to prevent and solve it! Here are some tips we’ve put together to help prevent your car engine from overheating.

How to know if your engine is overheating?

Basically, the overall cooling system keeps a standard operating temperature for the engine by circulating coolant, or antifreeze, through the engine to the radiator, thus pulling heat away from the engine.

There are some engine problems that may cause this situation. High temperature alone not cause the vehicle to overheat. If you are on a journey and the dashboard warning light is on, it means that the engine is emitting a strange smell, you see smoke, or you feel that your car is not driving as it should. Please take the following precautions for your vehicle.

What to do if your car engine starting overheating?

                If you find that your car is overheating, please follow these steps to ensure the safety of you and your vehicle:

  • Park the car and turn off the engine as soon as possible. Let your car cool down for at least 10 minutes.
  • Open the hood of the car to let the heat dissipate quickly. Do not remove the radiator cap immediately.
  • After the engine has cooled down, check the coolant level safely. Check whether the coolant level is at the “full” mark on the coolant container. If your vehicle requires to add coolant directly to the radiator, use a rag to remove the radiator cap. Make sure to cool the engine first, otherwise, you may burn yourself.
  • If the engine makes an unusual sound or fails to start at all, it is best to stay safe and ask for roadside assistance to tow your car. This will allow the mechanic to inspect it and perform necessary repairs.

Reasons Why Your Car Engine Starts Overheating?

Low Radiator Coolant level

                                As mentioned earlier, low coolant level is the first potential cause that needs to be investigated. Every car has a cooling system to help reduce the temperature of the engine. If your cooling system has a leak, blockage, or pump failure, the coolant may not circulate properly. Extremely low temperatures can cause the coolant to freeze and prevent circulation.

Damaged Car Thermostat

Another possible problem may be an issue with the thermostat. The thermostat of the vehicle regulates the amount of coolant flowing through the engine. The thermostat should be closed until the engine has warmed up, and then opened after the engine has warmed up to allow coolant to flow through the system. If it gets stuck, the coolant will not flow, thereby increasing engine heat. If the engine is hot but the upper radiator hose is cold to the touch, it may mean that the thermostat is broken.

Less Engine Oil Level

If your vehicle has a low oil level, it may cause your vehicle to overheat.

Bad Radiator Cooling Fan

Poor cooling fans are another potential cause. Start the vehicle and the air conditioner. Check the contents under the hood to make sure the cooling fan is spinning. A poor fan will result in insufficient air on the radiator to cool the engine. Check the fuse first. If it is okay, the motor may be burned out, or the temperature control switch may be faulty.


Use Quality Antifreeze & Coolant

Gars Coolant is an ideal solution for your car’s cooling systems. It eliminates additive drop, fouling and other problems inherent in traditional “green” coolants. It provides year-round protection against corrosion and heat damage.

Engine overheating is a sign of serious problems. Regular maintenance or inspections will help detect problems early before the vehicle is permanently damaged. If you have questions about coolant and cooling systems, we can help you at the Gars Customer Help Center. Leave your questions or queries on our inquiry form.