How to Properly Maintain Your Car’s Cooling System

July 25, 2025

Your car’s cooling system plays a crucial role in maintaining the engine's optimal temperature. Without it, your engine would quickly overheat, leading to serious and expensive damage. Unfortunately, many drivers don’t think much about their cooling system until a problem arises, usually in the form of overheating on a hot day or seeing steam pouring from under the hood. Learning how to properly maintain your cooling system can help you avoid these headaches and extend the life of your vehicle.


What Does the Cooling System Do


Your engine generates a lot of heat when it runs. The cooling system is designed to remove this heat and keep the engine operating at an optimal temperature.


Key components include the radiator, water pump, thermostat, hoses, and coolant (also called antifreeze). Together, these parts circulate coolant through the engine and then to the radiator, where heat is released into the air.


Importance of Coolant


Coolant is not just water but a special mixture that prevents freezing in the winter, raises the boiling point in the summer, and protects against corrosion inside the cooling system.


Over time, coolant can break down and lose its effectiveness. Old or contaminated coolant can cause corrosion, clog passages, and even damage the water pump and radiator.


Regular Coolant Checks and Changes


Checking your coolant level regularly is one of the simplest ways to maintain your cooling system. Always check the coolant when the engine is cool to avoid burns or injury. If the level is low, it may indicate a leak that needs immediate attention.


Most manufacturers recommend flushing and replacing the coolant every 30,000 to 60,000 miles, but this can vary depending on the vehicle and driving conditions. Regular coolant changes help remove debris and contaminants that can harm the system.


Inspect Hoses and Belts


Hoses carry coolant between the radiator, engine, and heater core. With age, they can become brittle, cracked, or swollen. Belts, including the one driving the water pump, should also be checked for wear.


Inspecting hoses and belts during oil changes or routine maintenance helps catch potential failures before they leave you stranded.


Keep an Eye on the Temperature Gauge


Your dashboard temperature gauge is an important tool. If you notice it creeping into the red zone, pull over safely and shut off the engine to prevent further damage.


Ignoring an overheating engine can lead to warped cylinder heads, blown head gaskets, or even total engine failure.


Check the Radiator and Cap


The radiator is the heart of the cooling system, and any blockages or leaks can severely impact its performance. Inspect the radiator fins for visible damage or corrosion, and verify that the radiator cap is in good condition.


The cap helps maintain pressure in the system, which raises the coolant’s boiling point and improves cooling efficiency. A faulty cap can cause coolant loss and overheating.


Don’t Forget the Thermostat


The thermostat controls the flow of coolant through the engine. If it gets stuck closed, your engine can overheat quickly. If it remains open, the engine may never reach its optimal operating temperature, resulting in reduced efficiency and performance.


Having the thermostat inspected as part of your cooling system checks can prevent these issues.


Benefits of Professional Inspections


While some maintenance tasks can be done at home, a professional inspection provides a more thorough evaluation. We use pressure tests to check for leaks, inspect all hoses and connections, and verify the system is functioning properly under operating conditions.


Catching small issues early helps avoid major repairs and unexpected breakdowns.


Protect Your Engine with B & B Automotive Inc in Aberdeen, WA


Your engine’s health depends on a reliable cooling system. At B & B Automotive Inc in Aberdeen, WA, our experienced technicians specialize in cooling system maintenance and repairs. From coolant flushes and hose replacements to thermostat checks and radiator service, we’re here to keep your engine running at the right temperature all year long.


Schedule your cooling system service today and enjoy peace of mind on every drive.

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