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HOW-TO SECTION
Fully Formulated Glycol Coolant Concentration Limits
Boron
125 – 500 PPM
Nitrite
900 – 3200 PPM
Nitrate
200 – 3200 PPM
Silicon
50 – 250 PPM
Phosphorous
0 PPM
pH
8.0 – 11.0
Table 22 Fully Formulated Glycol Coolant Limits with TMC RP-329,
TMC RP-330 Chemistry Type A (50/50 Coolant/Water
Mixture)
Recycled Antifreeze —
Antifreeze
or coolant recycled by reverse
osmosis, distillation, and ion
exchange, properly re-inhibited
to meet TMC RP-329 Type A or
TMC RP-330 Type A requirements,
has been demonstrated to provide
service equivalent to virgin antifreeze.
Recycled antifreeze or coolants of
these types are
preferred.
Other
recycled coolants, especially coolants
recycled through filtration processes,
are
not recommended
.
Ethylene Glycol/Water +
OAT Inhibitor or Propylene
Glycol/Water + OAT Inhibitor —
Ethylene glycol and propylene glycol
are also available with an OAT (
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 first. Refer to section Coolant
Maintenance. The cooling system
should either be equipped with a
“blank” coolant filter, or the coolant
filter 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.
100
All information subject to change without notice.
(Rev. 01/ 04)
6SE550 0401
Copyright © 2004 DETROIT DIESEL CORPORATION