TECH TIPS
Engine Coolant Freeze Points
Cummins ISB Engines For a Cummins ISB engine, the manufacturer spec for freeze point is between -32° to -54°C (-25° to - 65°F) . Ethylene glycol concentration is not to exceed 68%. Maintaining SCA concentration between 0.3 and 0.8 units/L (1.2 to 3.0 units/U.S. gal) is critical to preventing cylinder bore cavitation. This is only applied if you use standard coolant.
In 2017/2018 model year the Thomas C2 Cummins ISB engine was filled with OAT coolant.
Please make sure you look at the sticker by the coolant reserve to know what type of coolant your engine came with.
Here is a note from the Cummins engine manual on OAT coolant: Organic acid technology (OAT)/Extended Life Coolants use high levels of salts of organic acids for cylinder liner pitting protection and do not use nitrite and or molybdate. Therefore, these coolants do not have SCA numbers. Additionally, OAT additives deplete much slower than conventional additives and as a result OAT coolant do not require addition of SCA products.
Powered by FlippingBook