Distilled Water: What is it for in Cars?

When you drive a car, it is essential to consider some common problems that the vehicle can present, such as when the engine overheats due to lack of coolant, and you begin to notice some faults. Both overheating and freezing can damage some of the machine’s components, so it is essential to keep its temperature controlled.

To avoid the problems that high temperatures cause inside the engine, there are different types of cooling liquids responsible for maintaining the internal temperature in an ideal parameter for the optimal functioning of all its parts.

One of the best-known coolants is demineralized or distilled water for the car. However, do not forget that it is always preferable to use the coolant recommended by the manufacturer. Either way, do you know what demineralized water in the car is for? Pay attention to the main functions of this liquid.

Distilled Water: what is it for?

To understand the function of distilled water, what it is for, first, you have to know that it is a type of water that goes through a process that removes the minerals present to prevent corrosion of the engine’s mechanical parts and a malfunction in the future. 

Thus, this type of coolant manages to keep the engine temperature at a safe level and, at the same time, prevents its parts from being damaged by the presence of these minerals. However, it must be remembered that demineralized water does not work well as antifreeze because it freezes quickly: around 0 ° C, the first crystals begin to form in the water, harmful to the vehicle’s internal system. In turn, the distilled water must only be refilled when there is a drop in the level, in which case the technical service must be called immediately to detect the origin of the leak.

Coolant and anticorrosive

It is a compound made with additives that protect the parts of the internal mechanism, preventing corrosion and wear, which in the long run is very harmful. In addition, its composition allows it to reach a wide temperature range without evaporating or freezing, which is why it is recommended for areas with extreme temperatures. 

As with glycol, they also have lubricating properties, a greener alternative to the coolant. On the other hand, refrigerants tend to be compatible with materials in the cooling system. However, always remember to follow the manufacturer’s and distributor’s recommendations, and never mix different refrigerants, as the product of chemical reactions could form solid sediments that could end up clogging some engine ducts.


This liquid is the most suitable if you live in a freezing place since, due to its chemical composition, it does not freeze when the ambient temperature drops below 0 ° C. The antifreeze maintains the engine temperature at an acceptable level for its proper operation. In the correct proportions, it can be held without internal crystallization in ranges up to -40 or -50 ° C. 

In addition, demineralized or distilled water for The car can also refill the cooling system in cases where the coolant level is deficient. This prevents sudden engine overheating, which can cause problems while driving. But remember: if fluid levels vary, there may be a leak that requires attention. 

Now you know what demineralized water in the car is for and the other liquids that help regulate the temperature of your car. So whatever your choice, remember always to have some coolant; this will allow you to drive safely and reduce the risks of engine overheating.

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