Updated on November 9, 2025
Summer is here, and while you might enjoy the sun, your car definitely does not. High temperatures impose extreme stress on your vehicle's cooling system, tires, and battery.
To help you avoid a breakdown during your road trip, SPELAB experts have compiled this 7-point Summer Maintenance Checklist.
1. Tire Safety: Prevent Blowouts
Hot pavement heats up your tires, causing the air inside to expand. If your tires are already worn or improperly inflated, this added pressure can lead to a dangerous blowout.
Action: Check your tire pressure when the car is "cold" (before driving). Inspect the tread depth and look for any visible cracks in the rubber.
2. Brake System Inspection
Summer often brings sudden thunderstorms. Wet roads reduce friction, making your braking system critical. Additionally, high heat can cause "brake fade" during heavy traffic.
Action: Ensure your brake pads have sufficient thickness and check your brake fluid levels.
3. Prevent Engine Overheating & Fire Hazards
Summer is the peak season for engine fires and overheating. Old wiring, leaking oil, and strained cooling systems are the main culprits.
The stock cooling system often struggles in extreme heat, especially for modified diesel trucks. Inspect your Cooling System regularly. Upgrading to a high-performance Radiator can significantly drop engine temps.
4. Lubrication: Avoid Engine Seizure
High temperatures thin out your engine oil, reducing its ability to lubricate moving parts. In severe cases, this leads to oxidation and even bearing seizure (metal-on-metal friction).
Solution: Don't extend your oil change intervals in summer. For heavy-duty towing, consider installing an external Oil Cooler Kit to keep oil temperatures stable.
5. Air Conditioning Efficiency
A failing A/C isn't just uncomfortable; it's dangerous. If your A/C is blowing warm air, you may be low on refrigerant or have a clogged cabin filter. Running the A/C puts extra load on the engine, so ensure your drive belts are in good condition.
6. Paint and Interior Protection
UV rays are like sandpaper to your car’s clear coat. Wash and wax your car frequently to create a protective barrier.
Don't forget the interior: The dashboard can crack under intense heat. Use a Sun Visor when parked to lower interior temperatures and protect your upholstery.
7. Watch Fluid Levels (Anti-Evaporation)
Fluids evaporate faster in the heat. A loose gas cap can cause fuel evaporation (and a Check Engine Light), while low coolant can destroy your engine.
Crucial Check: Inspect your Coolant Reservoir Tank. Plastic OEM tanks are prone to cracking in the summer heat. If yours is yellowed or brittle, upgrade to a SPELAB Aluminum Coolant Tank for leak-free durability.
Summary
Summer driving doesn't have to be stressful. By monitoring your fluid levels and upgrading weak points like the cooling system, you can enjoy the season without calling a tow truck.
For more safety tips, check out the NHTSA Summer Driving Tips.
