![]() Your mechanic can test your coolant’s quality to ensure it is protecting your vehicle, but its good practice to renew it occasionally as just topping up at service time can deplete its effectiveness. Keep in mind that radiators and hoses can begin to leak unexpectedly even after visual inspection by your mechanic, although most workshops have a pump-like gadget that can pressurise your system to ‘load it up’ and test to find any leaks. When it comes to your engine cooling system and coolant levels, you can expect your mechanic to check them at service time. While the colour can be an indication of what type of coolant you currently use, it’s not a guarantee and it is best to check the info on the bottle and know what your vehicle’s manufacturer has recommended.Ī general rule to follow, however, is to never mix different colour coolants. You may have noticed they come in a variety of disturbing hues, from green to red to purple and even pink. The colour of the coolant is quite important. It’s more expensive than the regular stuff and is most often used in motorsports, for high-performance vehicles, and in older classNameic cars. HOAT (Hybrid Organic Acid Technology) is, as the name suggests, a mix of IAT and OAT components. There are three major types of coolant technologies: IAT (Inorganic Acid Technology) coolant is the traditional coolant mix which is often green and is generally suited to older model vehicles OAT (Organic Acid Technology), has a different chemical composition, is often red and offers a much longer service life. The different types and mix of these additives is what determines the type of coolant you should use. The additives in the coolant, along with the system pressure, give it its higher operating temperature (ensuring it does its job in the furnace of the engine), and they also inhibit rust and corrosion. ![]() ![]() The coolant flows in a continuous loop around the engine, including through the radiator where it is itself cooled. Today’s vehicles are so technically developed that we must look after all their systems, including engine cooling, a bit better than that! What is engine coolant?Ĭoolant is, generally, a blend of water and additives that is pumped through, and draws heat from, the engine, flowing through the car’s cooling systems and helping to keep the engine working at an ideal temperature. They could get away with this behaviour for a while but eventually, a few months down the track, that water ended up looking like a mud puddle and their cars were, shall we say, not running at peak performance. Back in the day, for those of you old enough to remember, youngsters would often top up their cars’ radiators or overflow bottles with tap water.
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