How to Procedures 1. Allow the engine to run for approximately five minutes at a moderate speed. 2. After the coolant temperature reaches 50°C (122°F), recheck the coolant level in the surge tank. The cooling system is correctly filled when the coolant is between the full and low marks on the surge tank. 3. Stop the engine and allow it to cool down. If necessary, fill the surge tank with approved coolant, Refer to section "How to Select Coolants". Do not overfill the cooling system as overfilling will cause the surge tank to push coolant out of the overflow.
How to Select Coolants 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. Extended Life Coolants Extended Life Coolants (ELC) contain Organic Acid Technology (OAT), which provides corrosion protection and inhibit liner cavitation. These coolants require less maintenance over the useful life of the engine.
ELC antifreeze coolants are commercially available from Detroit™ service outlets and other manufacturers as either concentrated or pre-mixed formulations. Concentrated coolants should be mixed at 50% (50% coolant/50% water). All ELCs used must also meet DFS 93K217 specification. Detroit™ requires that these types of coolants be free of nitrite and phosphate. Detroit™ has found that ELC's containing nitrite may lead to a breakdown of the coolant and subsequent damage to the cooling system. 72 All information subject to change without notice. Copyright © 2022 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0217