Why Is Regular Coolant Maintenance So Important?

Coolant is a vital part of any liquid cooling system – just like oil is in your car’s internal combustion engine. And just like engine oil, the coolant needs to be changed regularly to keep your liquid-cooled PC in top shape. There are 5  crucial functions that the coolant performs in liquid cooling loops.

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Transfers Heat

The first one is, of course, to transfer heat from the heat source to the radiator, where it’s cooled to the ambient temperature. This happens very rapidly and efficiently, but this is not the point of this blog post. You are reading this because you already know that liquid cooling is a superior way of cooling your high-end PC. But you still need to do a little bit of regular coolant maintenance.

Blog - Why to change a PC coolant - Liquid cooling loops

Protects from Corrosion

Purpose-made coolants, like our EK-CryoFuel, contain different components to perform their many functions. One of them is the corrosion inhibitor, which prevents metal components from degrading through the process of corrosion. But this inhibitor is constantly consumed in the process of performing its task. The more metals there are in the system, the higher the electrical potential is, and the more the corrosion inhibitor gets used. If there is not enough inhibitor substance in the coolant, corrosion may occur on the loop’s exposed metal components.

Blog - Why to change a PC coolant - Liquid cooling loops


Prevents Biological Growth

Where there is water, there is life. Yep, even coolants are not safe from biological growth if not well-maintained. This is why top coolants also contain biological-growth inhibitors or biocides, which prevent microorganisms from growing inside the tubing and other liquid cooling components. By inhibiting biological growth like algae, they also prevent the appearance of unpleasant odors, discoloration, and clogging of the cooling channels. We are yet to meet a liquid cooling enthusiast who would want such things living and blooming in their loop.

Blog - Why to change a PC coolant - Liquid cooling loops

Lubricates the Pump

Rotating components of liquid cooling systems, namely the pump motor, work hard to keep the system cool. Coolants lubricate them, but just like engine oil, they lose their lubrication power with time, which increases the possibilities of wear and defects.

Blog - Why to change a PC coolant - Liquid cooling loops

Brings Next-Level Aesthetics To Cooling Loops

Most of our customers who use colored coolants use them for aesthetics purposes. We all know how much pleasure an aesthetically complete build brings, especially when filled with EK-CryoFuel Solid coolants. Solid coolants are particulate-based coolants, and as the coolant’s ability to fight corrosion and biological growth diminishes over time, coolant fallout is also more likely to occur.

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An Additional Reason To Maintain Your Loop: Coolant Evaporation

The coolant slowly evaporates through the tubing as it is exposed to heat. This phenomenon is the most prominent with clear soft tubing, where a noticeable drop of coolant level can be observed with time. Builds based on hard tubing don’t suffer from this issue, or the evaporation is negligible. Don’t forget: If you don’t have any leftover coolant, you should never top it off with pure distilled water since it will further weaken the coolant’s effectiveness.

When To Change the Coolant?

The coolant needs to be regularly changed to preserve its functionalities, like preventing corrosion, biological growth, and excessive wear on pumps. In the long run, purpose-made coolants also improve the performance, aesthetics, and lifespan of all liquid cooling components.

Blog - Why to change a PC coolant - Liquid cooling loops

How often do you need to change the coolant then?

We recommend changing the coolant at least once per year to maintain its vivid color and basic functions discussed above. This doesn’t apply to certain special coolants. The unique, semi-transparent EK-CryoFuel Mystic Fog also contains UV reactive substances which can fade faster. For optimal visual performance, the recommended maintenance period is thus 6 months.

But even if not replaced every 6 months, the EK-CryoFuel Mystic Fog coolant will still perform its essential functions of protecting your loop for a full year. Similar goes for all coolants that contain UV additives, but the period when the UV reactivity fades varies based on the type and color of the coolant.

Blog - Why to change a coolant, EK Cryofuel coolants for custom loop PCs

Visit the EK Online Shop to find the best coolant for your liquid cooling system


So, What’s the Main Takeaway Here?

The use of high-quality, purpose-made coolants with regular maintenance decreases unnecessary additional costs. By replacing your coolant as recommended, you can avoid downtime and damage to your liquid cooling loop, just like regularly replacing the oil in your car will keep things running smoothly for a long, long time.

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Did You Know That There Is Dedicated Page With All EK Manuals

In order to make navigating through our webshop and searching for products easier for customers, we’ve decided to remove all EOL (End Of Life) products from search results, as well as categories as these products cannot be purchased anymore.


Did You Know That the Filling Bottle Can Also be Used for Draining?

Filling the loop with the Filling bottle is a really great help, especially if the reservoir is in a hard to reach position, surrounded by tubing or other components. But, did you know that you can also use it for draining the loop?


Did You Know Why EK Black Fittings Are Not Painted on the Inside?

We’ve seen a number of people complain about black EK fittings not being painted on the inside. And contrary to popular belief, that is not the case of EK being cheap or manufacturing process being simpler.

This is why you need coolants for water cooling

This Is Why You Need Purpose-Made Coolants

In the water cooling world, there are two tides. One goes for pretty colored coolants, the other wants only cooling performance and doesn’t worry about looks. Some of the people in the other movement are promoting pure distilled water as the best choice for liquid cooling as it requires almost no maintenance. So today we’re gonna talk about all the coolants, and also explain why pure distilled water can be a bad idea.


Useful tips – Part 3

In part 3 of useful tips, we’ll take a look at some things that might go wrong for custom liquid cooling builders and how you should avoid them.


Did you know that foaming of EK-Cryofuel Solid is totally normal

We’ve received many questions regarding the EK-CryoFuel Solid foaming and/or having air bubbles just after filling the system. Right off the bat, we can say that it’s totally normal and it will lessen over time. Solid colored coolants definitely experience it more than semi-translucent ones, so we’re mostly dedicating this to CryoFuel Solid lineup.

How to clean water blocks?

Water blocks may be disassembled for cleaning purposed on an occasional basis. Your warranty is not voided on dis-assembly of the water block, but the customer loses the EK leak-free guarantee which comes with a factory tested water block.

Antimicrobial (algae) protection?

EK Water Blocks recommended steps to be taken in order to prevent any biological growth within the warm waters of your computer liquid cooling loop.

What is plasticizer?

Plasticizers or dispersants are additives that increase the plasticity or fluidity of a plastic, especially polyvinyl chloride (PVC) tubing in computer liquid cooling.