What is a coolant service and why is it important?

In Vehicle Fluids, Vehicle Maintenance by HomeTowne Auto Repair & Tire

If you’ve brought your car in for service lately, maybe you heard that it’s time for your vehicle to have a coolant service.

What exactly is a coolant service, also known as a cooling system flush?

A coolant service is where we remove all of the rust, sludge, and dirty coolant (also known as antifreeze) fluid from your car’s radiator, water pump, and water houses. Technicians working on a coolant service will drive the coolant from your vehicle, flush the car’s system, and replace it with a fresh mixture of coolant. Coolant is made up of a mixture of either ethylene or propylene glycol and water – 50/50.

Why is a cooling system flush important?

The most obvious reason would be to ensure that your vehicle’s cooling system is working well, but let’s dig a bit deeper into exactly why getting a coolant service is important. The coolant flows through your radiator and water pump, which is an important piece of keeping your engine cool. Another reason why a cooling system flush is beneficial is that it provides heat through the heater core, and lastly because it lubricates the water pump.

Why does my vehicle’s coolant need to be changed?

As with almost everything in your vehicle, over time things will need to be repaired, replaced, and swapped out – your coolant is no different. Over time the coolant in your vehicle will become contaminated through the contact with the aluminum (think radiators and cylinder heads), iron (your car’s engine block or water pumps), and rubber, and this will lead to material buildup over time in your coolant.

All of that material moves through your vehicle, getting deposited in areas like the heater core and the radiator. Why does that matter? Because with that buildup, it reduces your cars ability to remove hear and can damage the internal pieces of your vehicle due that heat and buildup.

“As the coolant gets contaminated it loses its ability to lubricate which can cause early failure of the water pump. Changing the coolant removes the old fluid and contaminants restoring performance and lubrication of your cars cooling system,” said HomeTowne Auto Repair & Tire General Manager Richard Campbell.

How often do I need to change the coolant?

Every vehicle is different, and you should always consult your vehicle’s manual for specific intervals, but it is generally recommended that you have a coolant system flush at 30,000, 50,000, and 100,000 miles. Over the past few years some vehicle manufacturers have been extending coolant service intervals, but getting regular service can help you prevent costly repairs and breakdowns in the long run.