Coolants NOT Permitted

The following coolants are not to be used in Detroit™ engines:

• Automotive/Passenger car-type coolants must not be used in Detroit™ engines because they offer no liner pitting protection. Also, these types of coolants generally contain high levels of phosphates and silicates.
• Methyl alcohol-based antifreeze must not be used in Detroit™ engines because of its effects on the nonmetallic components of the cooling system and its low boiling point.
• Methoxy propanol-based antifreeze must not be used in Detroit™ engines 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 in Detroit™ engines. 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 in Detroit™ engines because with poor maintenance components become more vulnerable.