Eg Or Pg & Water + Sca Inhibitor; Mixing Eg Or Pg Antifreeze And Water - Detroit Diesel 50 Series Operator's Manual

HOW-TO SECTION
Ethylene Glycol & Water Plus
SCA Inhibitor or Propylene
Glycol & Water Plus SCA
Inhibitor — These products are
available as fully formulated,
phosphate-free, extended service
interval (ESI) coolants. They are
commercially available from Detroit
Diesel (recommended) and other
manufacturers as either a concentrated
antifreeze or as a pre-mixed antifreeze.
The pre-mixed antifreeze is ready for
use, while the concentrated coolant
must be mixed with water prior to use.
Detroit Diesel Power Cool engine
coolant (part number 23512138)
is the preferred ethylene glycol
coolant. If other commercial brands
of ethylene glycol are used, they
must be equivalent to the Power Cool
(see following paragraph). Detroit
Diesel does not market a propylene
glycol coolant. If a propylene glycol
coolant is used, it must also meet the
requirements listed in the following
paragraph.
Fully formulated ethylene
glycol-based, low silicate antifreeze
or coolant must meet TMC RP-329
"Type A" 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 (supplemental
coolant additive) prior to initial use.
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6SE550 0401 Copyright © 2004 DETROIT DIESEL CORPORATION
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 standards
listed in Table 24 and fill the cooling
system.
If a pre-diluted, fully formulated
coolant is purchased, simply fill
the cooling system. For best
overall performance, a coolant
consisting of 50% concentration
of antifreeze (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.
All information subject to change without notice. (Rev. 01/ 04)