What impact does adding coolant that doesn't meet specifications have?

Using coolant that does not meet the manufacturer’s specifications can lead to corrosion of system components. Engine coolants are formulated with specific additives designed to protect against rust and corrosion within the cooling system. These additives help to create a protective layer on metal surfaces, preventing deterioration due to the high temperature, chemical reactions, and the presence of moisture.

When a coolant fails to meet the required specifications, it may lack these critical corrosion inhibitors or may contain substances that can react adversely with the metals in the cooling system. This can accelerate the deterioration of components such as the radiator, water pump, and engine block, leading to leaks, blockages, or catastrophic failure of parts over time. The risk of corrosion is particularly heightened in older vehicles or those with already compromised cooling systems.

This issue emphasizes the importance of using the correct type of coolant as outlined by the vehicle manufacturer to ensure the longevity and reliability of the engine cooling system.