It’s Time to Spring Clean Your Vehicle’s Fluids

Spring cleaning isn’t just for your house; your vehicle should also regularly have the fluids flushed.

What Is a Flush? When you bring your car in for an oil change, most mechanics will check and top-up your fluids for you, but a top-up is no replacement for a flush. Here are three types of fluid flushes you should know about and their timing.

Transmission Flush

Why It’s Important: Over time, your transmission oil picks up dirt and grime that can coagulate on your friction clutches and cause clogs that can lead to severe damage to your transmission, which is one of your vehicle’s most expensive components.

What It Does: A transmission flush replaces 100% of your transmission fluid. By doing a 1-for-1 transfer of fluid, it allows for a purging of accumulated particles and deposits from the entire transmission with a specialized, cooler line flushing machine or pump inlet. A 1-for-1 transfer of fluid is done using a specialized cooler line flushing machine or pump inlet. During this fluid transfer, the entire transmission is purged of accumulated particles and deposits.

When to Get One: Every two years or 30,000 miles.

Coolant Flush

Why It’s Important: Your engine’s coolant (also known as antifreeze) includes ethylene glycol, a chemical compound that regulates the engine’s temperature and prevents it from overheating or freezing. As your coolant ages, the ethylene glycol breaks down and loses its ability to regulate temperature, which increases the risk of your engine overheating or freezing. Chemical buildups could clog your radiator or heater core and cause your car to overheat. Old coolant also loses its antiacidic properties, which can lead to corrosion of engine parts.

What It Does: A coolant flush removes all of the old coolant, which could turn acidic and start to clump. Other contaminants like rust and scale deposits that have built-up are also removed. New coolant is added, to help the engine run smoothly again.

When to Get One: Every two years or 40,000 miles.

Brake Fluid Flush

Why It’s Important: Your brake fluid is highly susceptible to gathering dirt and grime. Brake fluid is also hygroscopic, which means it pulls in moisture. If not regularly serviced, it can lead to inefficient or ineffective brakes — yikes!

What It Does: Your mechanic will use a brake-flushing machine to flush your brake hydraulic system of old brake fluid before replacing it with new fluid. A brake flush will also remove any water that may have built up in your brake lines due to condensation.

When to Get One: Every two to three years or every 25,000 to 35,000 miles. M