How to Select Coolants

Refer to the Coolant Requirements for Engine Cooling Systems (DDC-SVC-BRO-0002) manual for the most up-to-date coolant information.

Coolants used in Detroit™ engines must meet DFS 93K217 Specification with the following basic requirements:

• Provide an adequate heat transfer medium.
• Protect against cavitation damage.
• Provide a corrosion/erosion-resistant environment.
• Prevent formation of scale or sludge deposits.
• Be compatible with cooling system hose and seal materials.
• Provide adequate freeze protection.

The concentration of Extended Life Coolant (ELC) corrosion inhibitors will gradually deplete, at a much slower rate than Standard Life Coolant (SLC) corrosion inhibitors, during normal engine operation. Corrosion inhibitor limits are established by the coolant manufacturer. Therefore Detroit™ recommends following the manufacturer's recommendations as to minimum and maximum limits.