The dog days of summer are here, and someone thought it was a great idea to release the kids from school. While you're doing your best to preserve your sanity, it’s worth checking a few things on your car before heading out on that family road trip. Just like the summer sun, it all comes down to heat. Here is a list of things to make sure your vehicle runs in tiptop shape. 

Why Coolant Matters: Prevent Engine Damage in Summer Heat

Just like we humans need water to stay hydrated, an internal combustion engine (basically any non-EV on the road today) needs coolant—a water-glycol mix that circulates through the engine and is cooled by air passing through the radiator.

If your coolant level is too low, or worse, runs out, you guessed it: You’ll end up stuck on the side of the road with a serious repair bill. Most vehicles have a dashboard warning light that turns on when coolant levels drop, but if you want to double-check, pop the hood and look for the coolant expansion tank. This plastic container typically has a “full” line marked on the side.

Important Safety Note: Always check coolant levels when the engine is cold. Coolant is pressurized and opening the system while hot could launch a Yellowstone-style geyser of boiling fluid—sending you to the hospital instead of the beach.

To select the proper coolant for your vehicle, just stop by your local AutoZone or auto parts store and ask which type of antifreeze your vehicle takes.

Recharging Car A/C: DIY vs. Professional Help

Automotive air conditioning was first introduced by Packard in 1939 and has come a long way—from early swamp coolers blowing ice-chilled air into the cabin to today’s modern climate control systems. Before hitting the road this summer, make sure your A/C system is fully charged. Few things are worse than having hot air blasting in your face as you crawl toward your vacation destination.

To recharge your A/C, there are a couple of options. For mild cases where refrigerant levels have simply dipped over time, a DIY recharge canister from your local auto parts store can work well. However, if your system needs a full recharge—or if it’s blowing warm air consistently—it’s best to leave it to the professionals.

For added peace of mind, ask to include a UV dye in the recharge. If there’s a leak, the dye will help technicians pinpoint its source before refilling, saving you time, money, and frustration.
 
Replace Your Cabin Air Filter for Cleaner, Cooler Air

While we’ve covered the different types of filters throughout your car, including air, oil, and fuel filters, the cabin filter remains one of the most important for maintaining proper airflow and clean air inside the vehicle. It filters the air that enters your cabin through the HVAC system, removing dust, pollen, and other airborne contaminants.

The cabin filter is typically located under the dashboard or behind the glovebox, although manufacturers often change its location depending on cabin layout and available space. Replacing a clogged or dirty cabin filter ensures better air quality and helps your A/C system operate more efficiently, especially important during summer road trips.

Although replacing it might seem like an unnecessary upcharge when offered by a shop, it’s a relatively inexpensive part that can make a big difference in comfort and health, particularly for allergy sufferers. To find how to change it in ALLDATAdiy, simply search "cabin air filter" in the search bar and select "Passenger Compartment Air Filter Replacement" in Service and Repair category. 

Why Tire Age and Tread Matter in Hot Weather

One of the most critical, but often overlooked, components of a safe and comfortable road trip is your tires. They are the final connection between your vehicle and the road, affecting everything from handling and braking to ride quality and fuel economy.

To get the most out of your tires, make sure they are properly inflated according to the specifications recommended by the tire manufacturer (often found on a label inside the driver’s door jamb). Underinflated tires can cause premature sidewall wear and increase the risk of blowouts.

Beyond inflation, keep an eye on tread wear. A simple tire tread gauge can tell you if you're nearing the legal minimum—usually 2/32 of an inch. But tread isn’t the only concern.

Check the date codestamped on the sidewall. This four-digit code (two digits for the week, two for the year) tells you when the tire was manufactured. Most tire makers recommend inspection or replacement around the six-year mark, even if the tread still looks fine.

And don’t forget the spare tire—whether full-size or a compact donut. Check it for dry rot, cracks, and proper inflation before you hit the road. You’ll be glad you did if you ever need it.

What to Pack in a Car Emergency Kit for Summer Road Trips

With a solid pre-trip checklist completed, your journey should go according to plan. However, as Murphy’s Law states, anything that can go wrong will go wrong. To stay prepared, packing an emergency kit could quite literally be a lifesaver.

Essentials include extra water, which can be used temporarily in your coolant system in a pinch or, more importantly, to prevent dehydration. A flashlight, jumper cables, and a basic set of tools can also go a long way if trouble strikes on the road.

Other helpful items to consider include a self-contained phone charger, sunscreen, and when all else fails, a small dose of melatonin to help everyone get a bit of rest. You may not need any of it, but you’ll be glad you packed it if you do.

Summer Travel Reminder: Take Care of Your Car First

So, while you're packing up suitcases, swimsuits, and snacks, don't forget to check your car beforehand. Some maintenance items may seem costly upfront, but the price is far higher when you're dealing with problems on the side of the road. As the old adage from the '90s reminds us, take care of your car, and it’ll take care of you.