Is it normal for the coolant level to drop?

The cooling system is a vital component for the proper functioning of a vehicle, as it is responsible for maintaining engine temperature within optimal operating limits, preventing overheating and ensuring efficient performance. 

It is common for questions to arise about the behavior of its components. One of the most common is whether it is normal for the coolant level to drop. In this article, we'll explain the possible causes of this decrease, whether it poses a problem, and how to address it.

Causes of decreased coolant level

It is important to understand that a slight decrease in the coolant level (also called antifreeze) over time may be normal due to the gradual evaporation of the water that makes up the mixture. As long as the fluid remains within the recommended levels, there is no reason to be alarmed.

However, a significant or sudden drop is usually indicative of an underlying problem that requires attention. These are some of the most common causes:

• Leaks in the system. They are one of the most common causes of coolant loss and can occur in various parts of the cooling system, such as the radiator, hoses, water pump, or thermostat. It is important to visually inspect these components for signs of leaks, such as fluid stains or corrosion.
• Problems with the cylinder head or engine block. In more severe cases, coolant loss can be caused by cracks or deformations in the cylinder head or engine block. These breakdowns can allow coolant to leak into the cylinders, where it burns with the fuel, or into the engine oil, contaminating it.

How to act in the event of a decrease in coolant level

If you notice a significant drop in coolant level, it's important to take steps to identify and resolve the problem. Here are some steps you can take:

• Carefully check all components of the cooling system for leaks or signs of corrosion. Pay particularly close attention to the hoses, radiator, water pump, and thermostat.
• Check the radiator cap to make sure it is in good condition and sealed properly.
• Check the engine oil for signs of contamination with the coolant. If the oil appears milky brown or is unusually high, there may be an internal leak in the engine.
• Go to a specialized repair shop. If you can't identify the cause of the coolant loss or if you suspect a serious engine problem, it's best to take it to a specialized repair shop for a thorough check.
• Refill the coolant. Here is a guide with everything you need to know. 

Repsol Guard Coolants: protection and performance

To ensure the protection and optimal performance of your vehicle's cooling system, Repsol Lubricants offers the Guard range of coolants, which are tailored to the specific needs of each vehicle.

These products are formulated with cutting-edge technology to protect against corrosion, cavitation, and deposit formation, thus prolonging engine life.