Coolant Flush Cost in 2024.

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HOW IT WORKS

What is a coolant flush and how does it work?

Engine coolant, sometimes referred to as “antifreeze”, is a fluid that serves to control the operating temperature of your engine. It does its job by flowing through passages inside the engine where it absorbs heat caused by combustion. The hot coolant is forced out of the engine by the water pump, through a rubber hose, and into tiny tubes inside the radiator. Air blowing through the radiator steals heat from the coolant before the liquid makes its way back to the engine to pick up more heat. A coolant flush is a service aimed at removing all of the old coolant in the system, flushing out any leftover residue, and replacing it with new coolant.

HOW IS THIS SERVICE PERFORMED?

How is a a Coolant Flush done?

There are two services related to replacing the coolant in an engine, draining and filling the system or a coolant flush. Flushing the coolant system is a bit more involved and serves to remove residue that is left behind when the coolant is merely drained and refilled. To perform a coolant flush, a technician will either connect a dedicated coolant flush machine or allow the engine’s water pump to do the work.

With either procedure, the old coolant is drained from the radiator. Clean water is forced through the cooling system, often with a special cleaning agent added (this might be done using a flush machine or by running the engine for a period of time). Once the system has been flushed, the water is drained. Although not required, a vacuum device might be installed (included on a flush machine) to remove air from the system before installing fresh coolant.



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POPULAR VEHICLES

National average cost of a a Coolant Flush
for popular vehicles:

Car Model

Avg. cost

$50

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COMMON SYMPTOMS

Signs that your coolant needs to be replaced

The first sign that your engine coolant needs to be replaced is the recommendation of the manufacturer in the maintenance schedule for your vehicle. The coolant should be changed periodically according to the schedule to prevent problems with engine performance. But there are other signals to let you know there is a problem with the cooling system that could require either a coolant change or coolant flush. These include:

Your engine is overheating

The coolant level drops due to fluid loss

You notice a sweet syrup smell inside or outside the vehicle

The vents produce no heat when the heater is turned on

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Other questions customers ask

What happens if you don't flush coolant?
Like the oil in your engine, coolant needs to be replaced periodically. If you do not replace the coolant, over time it will become acidic and cause problems in the cooling system. Corrosion and sludge can form and clog up passageways. Blocked coolant flow or deteriorated coolant can both lead to overheating and catastrophic engine damage. Whether the coolant is flushed or drained and filled, it needs to be replaced regularly.
Is a coolant flush worthwhile?
Some mechanics insist that a coolant flush beats draining and filling the cooling system. Others argue that it is unnecessary. If your vehicle has a significant number of miles on it, or if you have neglected cooling system maintenance in the past, a coolant flush can help to remove harmful residue in a way that a drain and fill procedure cannot.
Can I do a coolant flush myself?
Adding engine coolant to top off the system when some fluid escapes can be done by most motorists, as long as the specific type of coolant is used. Some vehicle owners might be able to drain and refill the system or even perform a fluid flush using the engine’s water pump. Of course, a true fluid flush with a dedicated flush machine can only be done if you actually have the equipment. But in any case, extreme care must be taken when servicing the cooling system beyond a simple top-off. If air becomes trapped in the lines, overheating can occur. Many vehicles are prone to this problem. Therefore, it is best to have a trained mechanic perform the procedure.

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