![]() Hissing sounds or steam rising from underneath the hood Vehicle temperature gauge rising close to the danger zone when driving There are other signs that indicate your coolant should be changed soon, including: Some cars need a flush every 30,000 miles, while others can make it longer before requiring a change. The answer varies greatly depending on what type of vehicle you drive, when it was manufactured and what kind of coolant is used. When Should You Flush the Coolant?Ĭheck your manufacturer’s guidelines first to get a baseline of how often you should expect to change your fluid and flush the system. ![]() Regular flushing and replacement help prevent the coolant from losing its efficacy. ![]() Coolant also naturally picks up debris and rust from the engine as it circulates, which leads to discoloration, degradation and the debris being placed elsewhere in the engine. Once the liquid starts to deteriorate, it will not do the same effective job of cooling down your car when things get hot (or cold). Why Does Coolant Need to Be Flushed?Ĭoolant, like other liquids in your car, will naturally deteriorate over time. Engines in modern cars are not designed to withstand high heat for extended periods of time, so if the coolant cannot do its job, you could cause serious engine damage that leads to major repairs. When coolant levels drop, the fluid becomes too dirty, or the engine places too much debris into the coolant, it is unable to do its job. It works hard to make sure that your engine doesn’t overheat. Coolant is a liquid that passes through your vehicle’s water hoses, radiator, water pump and internal engine passages.
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