
Coolant Terminology
• ELC
Extended Life Coolant. A coolant that
relies on organic inhibitors for corrosion and
cavitation protection. Also known as Organic Acid
Technology (OAT) coolant.
• ELI
Extended Life Inhibitor
• SCA
Supplement Coolant Additive,
concentrated inorganic inhibitor package
• ASTM
American Society for Testing and
Materials
• Conventional Coolant
a coolant that relies
on inorganic inhibitors for corrosion and cavitation
protection
• Hybrid Coolant
a coolant in which the
corrosion and cavitation protection is based on a
mixture of organic and inorganic inhibitors.
• Extender
concentrated organic inhibitor
package
Coolant Recommendations
The following three glycol-based coolants are
recommended for use in Perkins diesel engines:
Preferred
– Perkins ELC
Acceptable
– A commercial heavy-duty antifreeze
that meets “ASTM D6210” specifications. Must be
replaced after 2 years.
Adequate
– A commercial heavy-duty antifreeze that
meets “ASTM D4985” specifications. Must be
replaced after 1 year.
REMARQUE
The Perkins industrial engines must be operated
with a 1:1 (50 Percent) mixture of distilled or deio-
nized water and glycol. This concentration allows
the NOx reduction system to operate correctly at
high ambient temperatures.
REMARQUE
Ne pas utiliser un liquide de refroidissement/antigel
commercial qui serait conforme uniquement à la spé-
cification ASTM D3306. Ce type de liquide de refroi-
dissement/antigel
est
réservé
aux
applications
automobiles légères.
REMARQUE
A commercial heavy-duty antifreeze that meets
“ASTM D4985” specification requires a treatment
with an SCA at the initial fill. Read the label or the ins-
tructions that are provided by the manufacturer of the
product.
REMARQUE
A commercial heavy-duty antifreeze that meets either
“ASTM D4985” or “ASTM D6210” specification requi-
res the SCA concentration to be checked at 500-hour
service intervals.
Perkins recommends a 50 percent volume glycol and
distilled or deionized water of the correct
specification. This mixture will provide optimum
performance as a coolant/antifreeze.
Distilled or deionized water is preferred. Water which
has the recommended properties may be used.
Tableau 26
Coolant Service Life
Coolant Type
Service Life
Required
Maintenance
Commercial Hea-
vy-Duty Antifreeze
that meets “ASTM
D6210”
3000 Service Hours
or Two Years
SCA at maintenance
intervals
Commercial Hea-
vy-Duty Antifreeze
that meets “ASTM
D4985”
3000 Service Hours
or One Year
SCA at initial fill and
SCA at maintenance
intervals
Perkins ELC
6,000 Service Hours
or Three Years
-
(1)
Use the interval that occurs first. The cooling system must also
be flushed out at this time. These service lives can only be met
if regular coolant sampling, analysis, and proper maintenance
are carried out, with the engine in normal service.
ELC
Perkins provides ELC for use in the following
applications:
• Heavy-duty spark ignited gas engines
• Heavy-duty diesel engines
• Automotive applications
The anti-corrosion package for ELC is different from
the anti-corrosion package for other coolants. ELC is
an ethylene glycol base coolant. However, ELC
contains organic corrosion inhibitors and antifoam
agents with low amounts of nitrite. Perkins ELC has
been formulated with the correct amount of these
additives to provide superior corrosion protection for
all metals in engine cooling systems.
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