HOW-TO SECTION OAT Coolant Drain Interval A properly maintained OAT-inhibited coolant will last 600,000 miles (960,000 km), four (4) years, or 10,000 operating hours, whichever comes first. At this time the coolant should be drained, and the cooling system should be thoroughly cleaned, flushed, and filled with new, properly inhibited OAT coolant. Power Cool SCAs Power Cool SCAs are water-soluble chemical compounds. These products are available in coolant filter elements, liquid packages, and in fully formulated Power Cool antifreeze. NOTE: Power Cool 3000 liquid SCA is more compatible with hard water than Power Cool 2000 SCA.
Chronic Coolant System Problems Power Cool Coolant Filter Elements Power Cool coolant filter elements (spin-on canisters) are available in various sizes suitable for cooling systems of varying capacities. Selection of the proper element size is vital when pre-charging non-fully formulated coolant at initial fill and at maintenance intervals. A fully formulated antifreeze must not have SCA added at initial fill. Do not use SCA-containing filters with OAT antifreeze or coolant. The need for maintenance elements is determined by the results of the nitrite concentration test performed at each cooling system interval.
Do not automatically install maintenance elements at maintenance intervals, unless the nitrite concentration falls below 900 parts per million. The most commonly seen coolant system problems result from maintenance and formulation factors such as: Hard water Dilution of the coolant by the addition of untreated water Over dosage or under dosage of corrosion inhibitors Improper corrosion inhibitor (most often phosphated) Mixing SCAs Improper testing Detroit Diesel Cooling System Maintenance Products The following products are available to do maintenance on the cooling system. Power Cool Cleaners Power Cool Liquid On-Line Cleaner is used for light deposits.
Power Cool Dry 114 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION