NOTICE
A commercial heavy-duty antifreeze that meets either
“ASTM D4985” or “ASTM D6210” specification re-
quires the SCA concentration to be checked at 500-
hour service intervals.
Perkins recommends a 50 percent volume (1:1)
glycol and distilled or deionized water of the correct
specification. This mixture will provide optimum
performance as a coolant/antifreeze. This ratio can
be increased to 60 percent volume ethylene glycol to
water if extra freezing protection is required.
For applications not requiring freeze protection, the
following can be used:
Preferred
– Perkins ELI
Acceptable
– A commercial supplemental coolant
additive (SCA) that meets “ASTM D5752”
specifications.
A mixture of SCA inhibitor and distilled or deionized
water is acceptable but will not provide the same
level of corrosion, boiling, and freezing protection as
ELC or ELI. Perkins recommends a 6 percent to 8
percent concentration of SCA in those cooling
systems. Distilled water or deionized water is
preferred. Water which has the recommended
properties may be used.
Table 8
Coolant Service Life
Coolant Type
Service Life
Perkins ELC
6,000 Service Hours or 3 Years
Perkins ELI
6,000 Service Hours or 3 Years
Commercial Heavy-Duty Anti-
freeze that meets “ASTM
D6210”
3000 Service Hours or 2 Years
Commercial Heavy-Duty Anti-
freeze that meets “ASTM
D4985”
3000 Service Hours or 1 Year
Commercial SCA and Water
3000 Service Hours or 1 Year
Extended Life Coolant (ELC)
Perkins provides ELC for use in the following
applications:
• Heavy-duty spark ignited gas engines
• Automotive applications
The anti-corrosion package for ELC is different from
anti-corrosion package for other coolants. ELC has
been formulated with the correct amounts of
additives. Superior corrosion protection is provided
for all metals that are in engine cooling systems. 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.
ELC is available in a premixed cooling solution with
distilled water. ELC is a 50 percent by volume of
glycol mixture. The premixed ELC provides freeze
protection to −37 °C (−34 °F). The premixed ELC is
recommended for the initial fill of the cooling system.
The premixed ELC is also recommended for topping
off the cooling system.
Containers of several sizes are available. Consult
your Perkins distributor for the part numbers.
ELC Cooling System Maintenance
Correct additions to the Extended Life
Coolant
NOTICE
Use only Perkins products or commercial products
that meet the requirements covered in this publication
for pre-mixed or concentrated coolants.
Do NOT use conventional SCA with Perkins ELC.
Mixing Perkins ELC with conventional coolants and/
or conventional SCA reduces the Perkins ELC serv-
ice life.
Do NOT mix brands or types of coolant. Do NOT mix
brands or types of SCA and/or brands or types of ex-
tenders. Different brands or types may use different
additive packages to meet the cooling system re-
quirements. Different brands or types may not be
compatible.
Failure to follow the recommendations can reduce
cooling system component life, unless appropriate
corrective action is performed.
To maintain the correct balance between the
antifreeze and the additives, you must maintain the
recommended concentration of ELC. Lowering the
proportion of antifreeze lowers the proportion of
additive. Lowering the ability of the coolant to protect
the system will form pitting, from cavitation, from
erosion, and from deposits.
SEBU8430-02
39