You’ve probably heard that distilled water should be used in your car’s heating system. But is that really true? And if so, why is it important?
Many car owners are unsure about the right coolant for their vehicles. In this article, we clarify why distilled water is so important for your car’s heating system and what advantages it offers.
Clear bottle of distilled water next to car parts, illustrating its use in car heating systems
Why is distilled water so important?
Quite simply: tap water contains minerals like calcium and magnesium. While these dissolve in water, they can precipitate out when heated and form deposits. In your car’s cooling system, this can lead to problems.
Imagine boiling water in a pot. Over time, limescale builds up on the bottom of the pot. It’s similar in the cooling system: the deposits settle in the radiator, hoses, and even the engine block.
Professor Hans Schmidt from the Technical University of Munich explains: “These limescale deposits act like an insulating layer and impair the cooling performance. This can lead to overheating and, in the worst case, to serious engine damage.”
The advantages of distilled water
Distilled water, on the other hand, is free of these minerals. It prevents limescale deposits and ensures optimal cooling performance.
Further advantages:
- Extends the lifespan of the cooling system: By preventing limescale deposits, the radiator, pump, and hoses are protected.
- Better corrosion protection: Distilled water is chemically neutral and does not attack the metal parts in the cooling system.
- Inexpensive and easy to obtain: Distilled water is available in every supermarket and at gas stations.
Distilled water vs. Coolant additive
It is often recommended to add a coolant additive (also known as antifreeze) to the distilled water. There’s a reason for this:
- Frost protection: The coolant additive prevents the coolant from freezing in winter and damaging the cooling system.
- Lubrication: The additive contains lubricants that protect the water pump and other moving parts in the cooling system.
Tip: Pay attention to the correct mixture of distilled water and coolant additive. You can find the information in your vehicle’s operating manual.
Bottle of coolant additive next to car parts, showing its importance alongside distilled water in car heating
Frequently asked questions about the topic
Can I use normal tap water?
As already mentioned, tap water is not recommended due to the minerals it contains. In an emergency, you can use it, but you should switch to distilled water as soon as possible.
How often do I have to change the distilled water?
It is recommended to change the coolant every two years or according to the manufacturer’s specifications.
Where can I get distilled water?
Distilled water is available in supermarkets, drugstores, and gas stations.
Conclusion
Distilled water is an important component for a functioning and long-lasting cooling system in your car. By using distilled water in combination with the right coolant additive, you can avoid costly repairs and extend the life of your engine.
Do you have questions about car repairs? On Autorepairaid.com you will find more helpful tips and tricks. If needed, our car experts are happy to help you with advice and assistance!
