Engine coolant symbol8/8/2023 ![]() Each manufacturer uses a different type, and there are even specialised versions of coolant on top of that. If you don't know how to do this, seek professional help and book a coolant change at a garage near you.Ĭoolant comes in several different forms. ![]() If you notice that your coolant is opaque, dark brown in colour and/or has lumps floating in it, you must flush and refill the system immediately. Most importantly, it should never be brown. While coolant comes in a variety of colours, it should always be transparent. That's why it's so important to look after your coolant and ensure it is always in good condition. This can cause expensive damage if you don't stop driving immediately. If you try to drive your car without this system, your engine is likely to overheat. This controls the temperature of the coolant. This pulls air through the radiator if the car is not moving fast enough to move the air itself. These connect the different parts of the cooling system. This conducts heat away from the coolant. This circulates the coolant around the engine. It also acts as a lubricant, preventing damage to the water pump, head gasket, cylinder and piston timing.Ĭoolant does this as part of the liquid cooling system. When working properly, it protects metal, rubber and plastic parts in the engine and coolant system. It prevents your car from freezing and boiling and keeps your oil in liquid form. Its main jobs are to transfer heat and add antifreeze protection to your engine. These are propylene glycol-based coolants.Īs coolant is antifreeze diluted with water, you can add diluted antifreeze to the tank to offer your engine more protection from the cold. However, ethylene glycol is highly toxic so, in recent years manufacturers have started using a much less toxic version. These are:Ĭar coolant is created by mixing ethylene glycol with additive packages and water. It is usually a liquid or a gas and must have several key properties. If you ignore this as well, you can cause expensive engine damage which can cost thousands of pounds to repair.Ĭoolant is used to control the temperature of a system. Ignoring a problem can cause your engine to overheat and the coolant warning light to come on. Similarly, if your coolant looks brown, opaque or has bits floating in it, you need to book a coolant change at a garage. If you check your coolant and the level is very low, or there is a sweet-smelling puddle under the car, you probably have a coolant leak that needs fixing. You must always use the right type for your car, which you can find in your vehicle handbook. ![]() It should be transparent and a bright colour of some kind. It is made of 3 parts Carbon, 8 parts Hydrogen and 2 parts Oxygen (C3H8O2).Ĭoolant works alongside the liquid cooling system to keep your engine from overheating or freezing. It is non-toxic and recognised as generally safe by the Food and Drug Administration (FDA). Propylene glycol - A nearly odourless, colourless synthetic liquid that absorbs water and is used as an additive in certain medicines, cosmetics or food products, as well as antifreeze. It is made of 6 parts Hydrogen, 2 parts Oxygen and 2 parts Carbon (C2H6O2). Viscosity is usually measured by the speed at which a liquid moves from one place to another.Įthylene glycol - A sweet-tasting, odourless and colourless liquid used as an organic compound in antifreeze and polyester fibres. This means that it doesn't react when exposed to extreme heat or form compounds with other elements.
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