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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.
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.
EXTENDED LIFE COOLANT (ELC) – RED
Heavy Duty RED 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 82).
Testing of conventional coolant
Freeze Point Protection Levels Concentrate (ethylene
glycol) and Water Mixtures
Concentrate and Water
Mixtures
40% Concentrate and 60%
water
50% Concentrate and 50%
water
60% Concentrate and 40%
water
67% Concentrate and 33%
water
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
Freeze Point Protection
-24.4 °C (-12 °F)
-36.7 °C (-34 °F)
-52.0 °C (-62 °F)
-70.6 °C (-95 °F)
Page 33
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