How To Select Coolant; Definitions; Approved Coolants - Detroit Diesel EPA04 Series 40 Operator's Manual

G. How to Select Coolant
Definitions
This section covers selection of
the required coolant for Series 40
engines. To help ensure complete
understanding of the information, the
definitions of the following terms are
provided:
Antifreeze — Ethylene glycol
or propylene glycol containing a
corrosion inhibitor package and which
meets an appropriate heavy-duty
specification (i.e., TMC RP-329 for
ethylene glycol or TMC RP-330 for
propylene glycol).
Coolant — The fluid mixture
circulating in the engine cooling
system, typically a mixture of 50%
water and 50% antifreeze.
Drop–Out — Precipitated sludge or
deposit formation on cooling system
components.
Fully Formulated Antifreeze —
Contains all the necessary inhibitors
to protect a diesel engine, and does
not, therefore, require a pre-charge of
SCA before its first use.
Initial–Fill Coolant — The coolant
that is used in a new or rebuilt engine,
or any time the cooling system is
emptied and then refilled with coolant.
OAT — Organic Acid Technology.
An inhibitor system based on
All information subject to change without notice. (Rev. May 2004)
DDC-SVC-MAN-0057 0305 Copyright © 2003 DETROIT DIESEL CORPORATION
SERIES 40 ENGINE OPERATOR'S GUIDE
organic acid inhibitors, instead of
traditional North American inhibitor
formulations.
SCA — Supplemental Coolant
Additive. SCAs are used in a
preventive maintenance program to
prevent corrosion, cavitation, and the
formation of deposits.

Approved Coolants

Required specifications for water,
ethylene glycol, propylene glycol,
inhibitor packages and inhibitor
concentration are included in
this section. To avoid possible
engine damage from inadequate
or overconcentrated coolant,
this information should be read
thoroughly before the coolant is
replaced.
The approved and preferred
coolants for Series 40 engines
are listed in Table 24. Once installed,
these coolants should be maintained
according to the procedures discussed
under Maintenance in this section.
NOTICE:
89