Navistar MaxxForce DT 9, Operation And Maintenance Manual

Page: 42 / 109

SECTION 2 – REQUIREMENTS FOR FUEL, ENGINE OIL, AND COOLANT
Coolant
COOLANT MIXTURES
Engine coolant mixtures include water, glycol (ethylene or
propylene), and inhibitors. Conventional and fully formulated
coolants require regular testing of inhibitor levels to maintain
safe levels of protection.
Testing of conventional coolant
determines levels of nitrite, nitrite/molybdate, and freeze point
protection.
If necessary, Supplemental Coolant Additives
(SCAs) are added to replenish inhibitors.
Extended life coolant mixtures (water and ethylene glycol) do
not require regular testing of inhibitor levels or addition of SCAs.
See (page 59) for service intervals.
EXTENDED LIFE COOLANT (ELC) – RED
Heavy Duty Extended Life Coolant (ELC) 50/50 Premix meeting
CEMS B-1 Type III is the standard factory fill for the cooling
system.
The coolant should minimally meet ASTM D6210,
Standard Specification for fully - Formulated Glycol Base
Engine Coolant for Heavy Duty Engines.
ELC 50/50 Extender is added at the designated service interval.
For further information see Extended Life Coolant (ELC)
Extender (page 88).
Freeze Point Protection Levels Concentrate (ethylene
glycol) and Water Mixtures
Concentrate and Water
Mixtures Freeze Point Protection
40% Concentrate and 60%
water -24.4 °C (-12 °F)
50% Concentrate and 50%
water -36.7 °C (-34 °F)
60% Concentrate and 40%
water -52.0 °C (-62 °F)
67% Concentrate and 33%
water -70.6 °C (-95 °F)
For vehicles operating in extremely cold climates, a coolant
mixture of 60% Concentrate and 40% water or 67% Concentrate
and 33% water provide freeze protection as shown in previous
table.
Mixtures having more than 67% Concentrate are not
recommended.
For cooling system service, see (page 90).
Form No. 1172040R1
Page 34
Printed in the United States of America