
SERIES 40 ENGINE OPERATOR'S GUIDE
Ethylene Glycol/Water +
OAT Inhibitor or Propylene
Glycol/Water + OAT Inhibitor —
Ethylene glycol and propylene
glycol are also available with a
(Organic Acid Technology) corrosion
package. These coolants require less
maintenance over the useful life of the
engine. OAT coolants, maintained as
detailed in the
Maintenance
section
of this guide, may be operated up to
4 years, 600,000 miles (960,000 km),
or 10,000 operating hours, whichever
comes
fi
rst. Refer to section
Maintenance. The cooling system
should either be equipped with a
“blank” coolant
fi
lter, or the coolant
fi
lter and piping may be omitted from
the system.
OAT fully formulated antifreezes
are available as concentrated and
pre-mixed. Concentrated antifreezes
should be mixed 50% (50% antifreeze,
50% water).
OAT coolants should not be mixed
with conventional coolants.
If they
are mixed, no damage will result, but
the long-life advantages of the OAT
coolant will be lost. In this event,
the coolant should be maintained as a
fully formulated IEG coolant, not as
an OAT (Organic Acid Technology)
coolant.
Detroit Diesel markets a OAT-
inhibited ethylene glycol coolant,
DDC
Power Cool
Plus, which
contains all the required additives.
If a non-DDC OAT antifreeze is
used, it must conform to TMC 338
speci
fi
cation.
Do not add extender to
new OAT antifreeze or coolant.
Water Only + SCA or Water
Only + OAT Inhibitor —
In
warm climates a coolant based
on water with corrosion inhibitors
is approved for use. Water-only
systems need to be treated with the
proper dosage of corrosion inhibitors.
Detroit Diesel-approved SCAs or
OAT corrosion inhibitors
must
be
added to the water to provide required
corrosion and cavitation erosion
protection. OAT inhibitors such as
Power Cool
Plus 6000 are available
for water-only systems. Inhibitor
should be mixed at 7.5% – 10% by
volume with water. For a list of
Power
Cool
products, refer to section
Power
Cool
Engine Products in this guide.
Traditional SCA (
Power Cool
3000)
can also be used to protect the engine.
Power Cool
3000 concentration limits
are listed in Table 26.
NOTE:
Do not use Power Trac 3–Way Test
Strips to test OAT coolant.
All information subject to change without notice.
(Rev. May 2004)
93
DDC-SVC-MAN-0057 0305
Copyright © 2003 DETROIT DIESEL CORPORATION