Some of this expanded coolant must then be diverted to the reservoir until it cools and contracts.Ī dirty reservoir, however, can prevent the expanded coolant from returning to the radiator. As coolant heats up inside of your vehicle's cooling system, it will expand.
Also known as an overflow tank, a coolant reservoir is a separate container that's designed to temporarily store heated and expanded coolant. You should consider cleaning out the coolant reservoir if you believe your vehicle is leaking coolant. If a hose is leaking, it will likely have fluid around the mating surface. With the engine cold, check the coolant hoses for signs of a coolant leak. There are usually two radiator hoses: one that sends coolant from the engine to the radiator, and another hose that sends coolant from the radiator to the engine. Radiator hoses are rubber hoses that run from the radiator to the engine. As the lip seal degrades, it may cause coolant to leak out from between the radiator cap and the radiator filler neck.Īssuming there's no visible fluid around the radiator cap, you should check your vehicle's radiator hoses. To refill your radiator with more coolant, you'll have to open this cap (don't open the radiator cap while the engine is hot or warm). All radiators have a cap that fits over the filler neck. While coolant leaks can occur in many different places, the radiator cap is one of the most common. With the hood open, look around the radiator cap to see if there's any liquid present. Fortunately, you can often diagnose a coolant leak by performing a few simple inspections. With a coolant leak, your vehicle's engine may overheat - even if it's cold outside. Coolant is responsible for removing heat from the engine so that it doesn't warp or otherwise fail. Is your vehicle leaking coolant? Regardless of the temperature outside, you won't be able to drive your car very long if it's leaking coolant.
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