Few things are more stressful than seeing your temperature gauge spike on a hot summer day. Whether you’re in stop-and-go traffic or cruising down the highway, an overheating radiator can bring your plans to a halt fast. Understanding what to do in the moment—and how to prevent it from happening again—can help protect your engine and keep you safe during the warmest months of the year.
Pull Over Safely and Turn Off the Engine
If you notice your temperature gauge climbing into the red, or you see steam coming from under the hood, pull over as soon as it’s safe. Turn off the engine to give it a chance to cool down. Running the heater to help pull heat away from the engine may help temporarily, but once you’re safely stopped, the best course of action is to shut the engine off completely.
Don’t Open the Radiator Cap Right Away
One of the most common mistakes drivers make is opening the radiator cap while the engine is still hot. This can cause pressurized coolant to spray out, leading to serious burns. Wait at least 30 minutes for everything to cool down before attempting to inspect the radiator or coolant levels.
Check Coolant Levels and Look for Leaks
Once the engine is cool, check the coolant reservoir. If it’s empty or low, that could be the reason for the overheating. Adding coolant or water temporarily may help you get to a repair shop, but it’s important to have the cooling system properly inspected to identify the root cause. Look for visible leaks, cracked hoses, or signs of corrosion around the radiator.
Call for Assistance If Needed
If your vehicle is still overheating after adding coolant—or if the coolant drains out quickly—you may be dealing with a serious issue like a failed water pump, clogged radiator, or broken thermostat. In this case, it’s best to call roadside assistance or a local repair shop rather than risk further damage by continuing to drive.
Final Thoughts
Radiator overheating is never convenient, but it’s especially common during summer. Acting quickly and safely can prevent engine damage and make a major difference in repair costs. If your radiator has shown signs of overheating, have it professionally inspected to avoid repeat issues—and enjoy worry-free driving all summer long.