Detroit Diesel 60 Series Operator's Manual page 60

Detroit Diesel Power Cool Engine
Coolant (P/N 23512138) is the pre-
ferred ethylene glycol coolant. If other
commercial brands of ethylene glycol
are used, they must be equivalent to
the Power Cool (see next paragraph).
Detroit Diesel does not market a propy-
lene glycol coolant. If a propylene glycol
coolant is used, it must also meet the
requirements listed below.
Fully formulated ethylene glycol-
based, low silicate antifreeze or coolant
must meet TMC RP-329 "Type A"
requirements. Fully formulated propy-
lene glycol-based antifreeze or coolant
must meet TMC RP-330 "Type A"
requirements. Fully
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 pur-
chased, mix the antifreeze with water
meeting the required quality standards
listed in Table 15 and fill the cooling sys-
tem.
Fully Formulated Glycol Coolant Concentration Limits
Boron
Nitrite
Nitrate
Silicon
Phosphate
pH
Table 13. Fully Formulated Glycol Coolant Limits with TMC RP-329, RP-330 Chemistry Type A
(50/50 Coolant/Water Mixture)
If a pre-diluted, fully formulated
coolant is purchased, simply fill the cool-
ing system. For best overall perfor-
mance, 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 rec-
ommended due to poor heat transfer,
reduced freeze protection (IEG only), and
possible silicate dropout. An antifreeze
concentration below 33% (33%
antifreeze, 66% water) offers too little
freeze and/or corrosion protection and is
not recommended. See Figure 22 for
ethylene glycol-based coolant concen-
formulated tration versus freezing and boiling tem-
peratures. See Figure 23 for propylene
glycol-based coolant concentration ver-
sus freezing and boiling temperatures.
Always verify that the freeze point and
nitrite concentration of the antifreeze/
water mix are correct by using a
PowerTrac™ 3-Way Coolant Test Strip.
If chemical analysis is used, elements in
the coolant must fall within the limits list-
ed in Table 13.
125 - 500 PPM
800 - 2400 PPM
200 - 750 PPM
50 - 250 PPM
0 PPM Max.
8.0 - 10.5
50