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SERVICE PRODUCTS
Dropout
Excessive amounts of some corrosion
inhibitors can cause a gel or crystalline
deposit that reduces both heat transfer
and coolant flow. This deposit is
called "dropout."
Dropout takes the color of the coolant
when wet, but becomes a white or gray
powder when dry. It can pick up solid
particles in the coolant and become
gritty. It will cause premature wear
of the coolant pump seals and other
components of the cooling system.
The wet gel can be removed using an
alkaline (non-acid) cleaner containing
either sodium nitrite or sodium
tetraborate.
If the gel is allowed to dry, it is
necessary to disassemble the engine
and clean it with a caustic solution,
or physically clean the individual
components.
Disposal
Coolants are biologically degradable
substances.
When disposing of used coolant,
comply with local legal requirements
and waste water regulations.
Consult the local water supply
authorities to determine the best
method of disposal.
A modern engine coolant has complex
tasks to perform. Do not allow any
60
DDC-SVC-MAN-0055
form of "reprocessing" which consists
only of mechanical purification.
Cold Weather Products
Special precautions must be taken
during cold weather. To protect your
engine, take the following special
measures in cold weather:
□ Use special cold weather fuel and
engine oil.
□ Check the concentration of
antifreeze in your coolant.
□ Take special care of your batteries.
Winter-Grade Diesel Fuel
At low outside temperatures, paraffin
may separate from the diesel and
affect its ability to flow freely.
Avoid breakdowns caused by this
problem (for example, blocked
filters) by using cold-resistant
winter-grade diesel fuel with improved
low-temperature flow characteristics.
In most cases, winter-grade fuel can
be used without problems at cold
outside temperatures.
If using summer-grade fuel or a less
cold-resistant winter grade, a flow
improver or kerosene can be added
with caution. The amount needed
depends on the outside temperature.
All information subject to change without notice. (Rev. )
Copyright © 2009 DETROIT DIESEL CORPORATION
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