Coolants Not Recommended; Additives Not Recommended - Detroit Diesel EPA04 Series 40 Operator's Manual

NOTICE:
Do not add additional SCA to
new, fully formulated antifreeze or
coolant. This can result in dropout
and/or the formation of deposits.

Coolants Not Recommended

The following coolants are not
recommended for use in Detroit Diesel
engines:
1. All antifreezes and coolants
containing phosphate are
not recommended. Drop out,
overheating and water pump seal
failures can result from the use
of coolant or inhibitor packages
based on phosphate.
2. Automotive type coolants
generally contain high levels of
phosphate and silicate, offer no
liner pitting protection, and are
not suitable for use in Detroit
Diesel engines.
3. Methyl alcohol-based antifreeze
must not be used because of
its effect on the non-metallic
components of the cooling system
and its low boiling point.
4. Methoxy propanol-based
antifreeze must not be used
because it is not compatible with
the fluoroelastomer seals found in
the cooling system.
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
5. Glycol-based coolants formu-
lated for heating/ventilation/air
conditioning (HVAC) should not
be used. These coolants generally
contain high levels of phosphates,
which can deposit on hot internal
engine surfaces and reduce heat
transfer.

Additives Not Recommended

The following additives are not
recommended for use in Series 40
engines:
1. Soluble oil additives are not
approved for use in Detroit Diesel
engine cooling systems. A small
amount of oil adversely affects
heat transfer. For example, a
1.25% concentration of soluble
oil increases fire deck temperature
6%. A 2.50% concentration
increases fire deck temperature
15%. The use of soluble oil
additives may result in engine
overheating and/or failure.
2. Chromate additives are not
approved for use in Detroit
Diesel engine cooling systems.
Chromate additives can form
chromium hydroxide, commonly
called "green slime." This,
in turn, can result in engine
damage due to poor heat transfer.
Cooling systems operated with
chromium-inhibited coolant must
be chemically cleaned with Power
95