Coolants Not Permitted

The following coolants are not to be used in Detroit™ Gen 5 Heavy Duty engines :

• Automotive/Passenger car-type coolants must not be used because they offer no liner pitting protection. Also, these types of coolants generally contain high levels of phosphates and silicates.
• Methyl alcohol-based coolant must not be used because of its effects on the nonmetallic components of the cooling system and its low boiling point.
• Methoxy propanol-based coolant must not be used because it is not compatible with fluorocarbon elastomer seals found in the cooling system.
• Glycol-based coolants formulated for Heating/Ventilation/Air Conditioning (HVAC) must not be used. These coolants generally contain high levels of phosphates, which will form deposits on hot internal engine surfaces, reduce heat transfer, and cause water pump seal leaks.
• Waterless-type coolants must not be used.
• Nitrite Organic Acid Technology (NOAT) must not be used because engine components can become more vulnerable to failure.