2022-2024 Stellantis Engine Coolant Water Quality TSB

Stellantis has issued a manufacturer communication, NHTSA ID 10239957, emphasizing the significance of "Water Quality When Mixed With Engine Coolant." This technical service bulletin (TSB) serves as a crucial reminder for technicians regarding best practices when servicing the ENGINE AND ENGINE COOLING systems in various 2022-2024 models, including the 2024 Alfa Romeo Tonale manufacturer_communication.

This communication aims to prevent potential issues that can arise from using unsuitable water when diluting engine coolant. Proper coolant mixture is vital for maintaining engine temperature, preventing corrosion, and ensuring the overall health of the cooling system.

Understanding Engine Coolant and Water Quality

Engine coolant, often referred to as antifreeze, is a specialized fluid designed to regulate engine temperature and protect against freezing and boiling. It also contains additives that prevent corrosion and lubricate water pump seals. For optimal performance, coolant is typically mixed with water, usually in a 50/50 ratio.

The quality of the water used in this mixture is paramount. Tap water, for instance, often contains minerals like calcium, magnesium, and iron, as well as chlorine and other impurities. These contaminants can react with the coolant's additives, reducing their effectiveness and potentially leading to significant problems within the cooling system.

Potential Issues from Poor Water Quality

Using water with high mineral content or impurities can lead to several adverse effects on your vehicle's cooling system. These can include:

• Corrosion: Minerals can accelerate corrosion of metal components such as the radiator, water pump, and engine block, leading to leaks and system failure.
• Scale Buildup: Hard water minerals can deposit as scale on internal surfaces, reducing heat transfer efficiency and potentially causing the engine to overheat.
• Additive Depletion: Impurities can prematurely deplete the protective additives in the coolant, diminishing its ability to prevent corrosion and lubricate components.
• Reduced Coolant Lifespan: The overall effectiveness and lifespan of the engine coolant can be significantly shortened, requiring more frequent flushes and replacements.

These issues can compromise the ENGINE AND ENGINE COOLING system, leading to costly repairs and potential engine damage if left unaddressed.

Manufacturer's Guidance

While the specific details of the manufacturer communication NHTSA ID 10239957 are not fully outlined in the summary, the title "Water Quality When Mixed With Engine Coolant" strongly suggests that Stellantis is advising technicians to use demineralized or distilled water when preparing coolant mixtures. This ensures that the coolant's chemical properties are maintained and that no external contaminants are introduced into the cooling system.

This guidance applies to a wide range of 2022-2024 Stellantis vehicles, including popular models like the Jeep Grand Cherokee, RAM 1500, Dodge Hornet, and the 2024 Alfa Romeo Tonale manufacturer_communication, among others. Adhering to these guidelines is crucial for proper maintenance and to avoid potential cooling system failures.

What Owners Should Know

As an owner of a 2022-2024 Stellantis vehicle, it's important to ensure that your vehicle receives proper maintenance. When your vehicle's cooling system is serviced, particularly during a coolant flush or top-off, inquire with your service technician about the type of water being used to mix with the engine coolant. Confirming that demineralized or distilled water is used can help prevent future cooling system problems.

This proactive approach can contribute to the longevity and reliability of your ENGINE AND ENGINE COOLING system, protecting your investment and ensuring your vehicle operates as intended.

Source: NHTSA ID: 10239957