MBE 900 OPERATOR'S GUIDE Water Coolant Specifications Water containing no additives is not suitable as a coolant, even if no antifreeze protection is needed. To avoid damage to the cooling system, use only an approved corrosion-inhibiting antifreeze. Approved antifreeze must be fully-formulated and comply with the requirements of the Truck Maintenance Council (TMC). Coolant specifications are listed in Table 2. Detroit Diesel POWER COOL products meet these specifications and are recommended. The water used in the coolant must comply with certain requirements, which are not always satisfied by drinking water. If water quality is inadequate, the water must undergo suitable treatment.
The following types of water are preferred for use in coolant: Distilled water Coolant Concentration When topping off the cooling system after a drop in the coolant level, the concentration of corrosion-inhibiting antifreeze in the coolant must be 50 percent by volume. This affords protection down to a temperature of –37°C(–34°F). The cooling mixing ratio is listed in Table 3. Water purified by reverse osmosis De-ionized water NOTICE: In some areas, tap water can contain high levels of dissolved chlorides, sulfates, magnesium, and calcium, causing scale deposits, sludge deposits and/or corrosion. These deposits can damage the coolant pump and allow the engine to overheat.
Table 2 Coolant Specifications All information subject to change without notice. (Rev. 04/08) 59 DDC-SVC-MAN-0055 04/08 Copyright © 2008 DETROIT DIESEL CORPORATION Type of Coolant Requirement Fully-Formulated Ethylene Glycol TMC RP-329 Type "A" Fully-Formulated Propylene Glycol TMC RP-330 Type "A" Water plus Corrosion Inhibitors Temperature Must Not Fall Below 0°C (32°F)