Peterbilt 579 - Cooling System; Cooling System Maintenance

COOLING SYSTEM
COOLING SYSTEM
Cooling system
maintenance
Your engine’s cooling system is
standard with Extended Life Coolant
(ELC). ELC consists of a mixture of
ethylene glycol, water, and organic
acid technology chemical inhibitors.
ELC prevents corrosion and scale
formation as well as provides freezing
and boiling point protection.
CAUTION
The engine cooling system has very
specic maintenance and inspection
requirements. Failure to follow re
-
quirements can damage the engine.
Engine damage can include but is not
limited to:
• Freezing
• Boiling
• Corrosion
• Pitted cylinder
liners
This information is found in the engine
manufacturers owner’s manual. It is
the owner’s responsibility to follow all
requirements listed in the engine man
-
ufacturers owner’s manual.
What to Check in an ELC-lled
Cooling System
ELC Concentration
Check the
level of freeze/boilover
protection, which is determined by
the ELC concentration. Use a glycol
refractometer to determine glycol level.
Add ELC to obtain the ELC to water
ratio required to provide the protection
you need. Use the chart below to help
determine how much ELC you need
to add.
NOTE
Maximum recommended ELC con-
centration is 60% ELC and 40% water
by volume (a 60/40 coolant mixture).
The minimum recommended concen
-
tration is 40%.
In an ELC-lled cooling system, the
freeze point should be maintained
between -30° F and -45° F (-34° C and
-43° C).
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(04/13) Y53-6047–2C 5-71