Automobile engines work extra hard in the summer, and it is the cooling system’s job to protect the engine from overheating. In addition, additives in the coolant protect the radiator and internal engine components against wear and corrosion. Without proper cooling system maintenance, the odds of long term engine damage, and a summer time boil over, definitely increase.
Over time, engine coolant becomes contaminated and its protective additives are depleted. That’s why the system should be flushed and the coolant replaced periodically as recommended by the vehicle manufacturer. Older coolants used to require changing every two years or 24,000 miles, but most modern formulations are good for at least five years and 50,000 miles. See the owner’s manual or maintenance booklet to determine the service interval appropriate for your vehicle.
Between flushes, make sure the coolant is filled to the proper levels by checking the overflow reservoir. If necessary, top off the reservoir with the proper mix of water and the coolant type specified by the vehicle manufacturer in the owner’s manual. CAUTION: Never remove the radiator cap when the engine is hot; boiling coolant under pressure could cause serious burns.
Rubber cooling system components are also susceptible to deterioration caused by extreme heat. Inspect hoses and drive belts for cracking, soft spots, or other signs of poor condition. Worn parts are more susceptible to failure in hot conditions and should be replaced.