MBE 900 ENGINE 2007 OPERATOR'S GUIDE Detroit Diesel Power Cool engine coolant (part number 23512138) is the preferred ethylene glycol (EG) coolant. If other commercial brands of ethylene glycol are used, they must be equivalent to the Power Cool . Detroit Diesel does not market a propylene glycol (PG) coolant. If a propylene glycol coolant is used, it must also meet the following requirements: (50% antifreeze, 50% water) is recommended . An antifreeze concentration over 67% (67% antifreeze, 33% water) is not recommended due to poor heat transfer, reduced freeze protection (IEG only), and possible silicate dropout.
An antifreeze concentration below 33% (33% antifreeze, 67% water) offers too little freeze and/or corrosion protection and is not recommended . Fully formulated ethylene glycol-based, low silicate antifreeze or coolant must meet TMC RP-329 “Type requirements. Fully formulated propylene glycol-based antifreeze or coolant must meet TMC RP-330 “Type A” requirements. Fully formulated antifreeze does not require a dosage of SCA prior to initial use. Mixing EG or PG Antifreeze and Water If a concentrated ethylene glycol (EG) or propylene glycol (PG) antifreeze is purchased, mix the antifreeze with water meeting the required quality standardslisted in Table 15 and fill the cooling system.
If a pre-diluted, fully formulated coolant is purchased, fill the cooling system. For best overall performance, a coolant consisting of 50% concentration of antifreeze All information subject to change without notice. (Rev. 04/08) 103 DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION