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You may love the heat of summer, but you need to help your car keep its cool when temperatures rise. An engine that runs too hot can damage the vehicle and threaten your safety. Here are some tips we’ve compiled to help prevent your car from overheating.

Park your car in the shade

Parking in the shade not only keeps you cool, but can prolong the life of your car. No shady spot? Use a sunshade to reduce heat inside the car.

Use car window shades

UV heat shields will keep the interior from getting super-hot, plus it protects your interior from the damaging effects of the sun.

Tint your windows

A local dealership or auto body shop can apply window tinting or window film to help keep your car cooler, and provide UV ray protection against sun damage.

Leave car windows open slightly

Leave your windows open slightly so the air can escape – and if you have a sunroof, crack that open too.

Turn the floor air vents on

Hot air rises, so switch to the bottom vents and put your blower on the maximum setting to push that air out. Then, once the car begins cooling, you can open the upper vents again.

Use the fresh air setting instead of recirculation on your A/C

Using the recirculation setting means you’re just moving that hot, trapped air around your vehicle, so that’s something you want to use after your car has had the chance to cool down.

Keep your eye on the car temperature gauge

The device has a needle that should always be pointing toward the center. If it points toward hot, pull over, turn off the engine and let the car cool down.

Turn on the heat to cool the engine

Turning on the heat may be the last thing you want to do on a hot summer day, but it can pull hot air from the engine compartment and cool the engine.

Add engine coolant

The coolant level is shown by indicator lines on the reservoir. If too low, simply add the appropriate amount of coolant and reattach the cap. Never add coolant to a hot engine.

Have your radiator flushed by a mechanic

A radiator flush, also known as coolant flush, involves draining old coolant from the radiator, cleaning it with flush fluid and adding new coolant.

Consider replacing your car battery

If your car battery is older than three years, it may not be providing the power it once did, so your car has to work harder and can overheat.

Even if you love the heat of summer, but you need to help your car keep its cool when temperatures rise. An engine that runs too hot can damage the vehicle and threaten your safety. Here are some tips we’ve compiled to help prevent your car from overheating:

How to keep your car from overheating

1. Park your car in the shade

You can feel the temperature difference between the shade and the sun – and so can your car. Parking in the shade not only keeps you cool but also can prolong the life of your car. No shady spot? Use a sunshade to reduce heat inside the car. 1

2. Tint your windows

A local dealership or auto body shop can apply window tinting or window film to help keep your car cooler, and provide UV ray protection against sun damage.1

3. Use car window shades

Keeping window shades in the car is helpful because you can’t always guarantee that you’ll find a shaded or covered area to park in. These UV heat shields will keep the interior from getting super-hot, plus they protect your interior from the damaging effects of the sun.1 You might even consider getting custom-made window shades to fit your car’s make and model. These sunshades can be more effective at keeping out all the rays.

4. Leave car windows open slightly

Closed windows trap hot air, and the glass serves as a conductor that helps heat up the enclosed space. Leave your windows open slightly so the air can escape – and if you have a sunroof, crack that open too.1 Make sure the opening is not large enough for someone to reach through. If you leave your windows cracked, remember to keep an eye on the weather – one sudden summer storm could lead to a soggy interior.

5. Turn the floor air vents on

Most people get in the car and turn the dash board are vents on “high” to get the air flowing. But you’re actually better off directing the air through the floor vents. Hot air rises, so switch to the bottom vents and put your blower on the maximum setting to push that air out. Then, once the car begins cooling, you can open the upper vents again.3

6. Use the fresh air setting instead of recirculation on your A/C

Set your air conditioning on fresh air for about 10 minutes. Using the recirculation setting means you’re just moving that hot, trapped air around your vehicle, so that’s something you want to use after your car has had the chance to cool down.

7. Cover the steering wheel and seats with a towel or blanket

Leather or dark upholstery can get especially hot in the sun during the summer. You can keep your car’s interior cooler by covering your steering wheel and seats with a towel, a or blanket,, or seat and steering wheel covers.1

8. Invest in a remote starter

A remote starter can help cool down your vehicle before you even get in it. This can help reduce your need to run the AC for the duration of your drive, and you can take advantage of circulating fresh air instead.1

9. Keep your eye on the car temperature gauge

Located on the dashboard, the device has a needle that should always be pointing toward the center. If it points toward hot, pull over, turn off the engine and let the car cool down.

10. Turn on the heat to cool the engine

Turning on the heat may be the last thing you want to do on a hot summer day, but it can pull hot air from the engine compartment and cool the engine. It won’t fix the underlying problem, but it’s a good measure for long drives.3

11. Add engine coolant

This is especially important in hot months. To check the coolant level, open the hood and locate the coolant reservoir. The coolant level is shown by indicator lines on the reservoir. If too low, simply add the appropriate amount of coolant and reattach the cap. Engine coolant is often sold as a 50/50 mix of water and coolant. You can also buy concentrated coolant and mix it yourself.2

Safety tip: Never add coolant to a hot engine. Wait for the engine to cool before removing the cap or pouring in coolant.

12. Have your radiator flushed by a mechanic

Even if you keep engine coolant at the right levels, it will eventually get dirty and need to be replaced.  A radiator flush, also known as coolant flush, involves draining old coolant from the radiator, cleaning it with flush fluid and adding new coolant. Mechanics recommend a flush every 40,000 miles, but check your owner’s manual for the manufacturer’s recommendation.2

13. Consider replacing your car battery

If your car battery is older than three years, it may not be providing the power it once did, so your car has to work harder and can overheat. Your mechanic can help you determine whether you may need a new battery. Find out when to change your car battery.

What happens when a car overheats

Cars can give off several different kinds of signals that they are overheating. Most noticeably, you may might see steam coming from your car’s hood. A strange burning or sweet odor coming from the car’s engine is another sign that your car could be overheating. Additionally, the engine temperature gauge on your dashboard can spike into the red or to “H.”. Note that engine temperature gauge symbols can vary from car to car.2

What causes a car to overheat

You might well ask, “Why is my car overheating?” There are a few engine problems that can cause a car to run hot. High temperatures alone might not be causing your vehicle to overheat. If your car’s cooling systems aren’t functioning correctly, that can lead to serious damage to your engine and expensive repairs. Here are a few car overheating causes:

Coolant

Every car has a cooling system to help keep the temperature of the engine down. If your cooling system has a leak, blockage or pump malfunction, the coolant might not be able to circulate properly.2 Cooling system malfunctions aren’t just problematic when it’s hot out; very cold temperatures can cause coolant to freeze and prevent circulation.

Car Thermostat

Another possible issue could be a problem with the thermostat. A vehicle’s thermostat is responsible for regulating the amount of coolant flowing through the engine. A broken or malfunctioning one can easily cause your car to overheat.

Low motor oil

A car’s oil does more than just lubricate moving parts. It also helps to remove excess heat from the engine. If your vehicle has low oil, it might be causing your car to run hot.

Radiator cooling fan

If your cooling fan isn’t turning on or running at the right level, it can case your car to overheat. Radiator fans usually run on electric motors, so any motor mechanical problems can lead to your fan not providing enough cool air flow.

Of course these aren’t the only possible problems that can cause a car to overheat. It’s a good idea to find a reliable mechanic who can diagnose and service your car, and get protection in case your car overheats while you’re on the road.

What to do when your car overheats

If you find yourself in a situation where your car overheats, follow these steps to ensure you and your vehicle remain safe:

Pull over to the side of the road, park your car and turn off the engine as soon as possible. Let your car cool for a minimum of 10 minutes.2Open the hood of your car to allow the heat to clear out quickly.2Once your car has cooled off, turn the ignition to its first position (don’t start the engine). If you see that the temperature gauge is within a normal range and engine fluid levels are sufficient, try to start the engine.2If the engine makes unusual sounds or it does not start at all, it’s best to stay on the safe side and call for roadside assistance to have your car towed. This will allow for a mechanic to inspect it and make the necessary repairs.2

Sources

[1] “How to Stop Your Car’s Interior From Overheating,” breakerlink.com/blog/driving/how-to-stop-your-cars-interior-from-overheating/#:~:text=Cover%20Your%20Vehicle’s%20Interior%20Parts&text=One%20cheaper%20option%20is%20to,covers%20or%20use%20towels%20again (accessed March 23, 2022).
[2] “What to Do (& Not Do) When Your Car Overheats,” firestonecompleteautocare.com/blog/maintenance/when-car-overheats/# (accessed March 23, 2022).
[3] “How to Avoid Overheating Your Vehicle,” ormsbyservice.com/blog/articles/How-to-Avoid-Overheating-your-Vehicle#:~:text=Believe%20it%20or%20not%2C%20your,your%20dashboard%20vents%20back%20up (accessed March 23, 2022).

Disclaimer:
The information included is designed for informational purposes only. It is not legal, tax, financial or any other sort of advice, nor is it a substitute for such advice. The information may not apply to your specific situation. We have tried to make sure the information is accurate, but it could be outdated or even inaccurate in parts. It is the reader’s responsibility to comply with any applicable local, state or federal regulations. Nationwide Mutual Insurance Company, its affiliates and their employees make no warranties about the information nor guarantee of results, and they assume no liability in connection with the information provided. Nationwide, the Nationwide N and Eagle and Nationwide is on your side are service marks of Nationwide Mutual Insurance Company. © 2022 Nationwide

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