Contamination Of Coolant - Navistar MaxxForce 7 Operation And Maintenance Manual

SECTION 2 – REQUIREMENTS FOR FUEL, ENGINE OIL, AND COOLANT
Coolant (cont.)
EXTENDED LIFE COOLANT (ELC) - RED (cont.)
For vehicles operating in extremely cold climates, coolant
mixtures of 60% Concentrate and 40% water or 67%
Concentrate and 33% water provide additional freeze protection
as shown in table above. Mixtures having more than 67%
Concentrate are not recommended.
For further information see Coolant Freeze Point (page 79).

CONTAMINATION OF COOLANT

The coolant color should indicate the condition of the coolant.
• Coolant color should be a reddish orange (clear – not
cloudy).
• Coolant must not have floating debris or visible oil.
Contamination of ELC with other coolant products will not be
obvious.
To verify coolant quality, contact an authorized service provider,
or use a refractometer to verify coolant strength. For further
information see Freeze Point Protection Levels Concentrate and
Water Mixtures(page 37).
Page 38