Coolant - Detroit Diesel MBE 4000 Service Manual

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5.3

COOLANT

Coolant is a mixture of water and antifreeze. Under normal conditions, it is a mixture of 50
percent water and 50 percent antifreeze, but under extreme cold weather conditions, as much as
60 percent antifreeze can be added. For reasons of anticorrosion protection and to raise the boiling
point, the coolant must remain in the cooling system all year round.
Regardless of mileage, replace the coolant every two years since the degree of corrosion
protection gradually drops with time.
5.3.1
Antifreeze approved for use in the MBE 4000 engine is a mixture of glycol compound (ethylene
glycol), and corrosion inhibitors. Antifreeze containing glycol compounds and corrosion
inhibitors is known as fully-formulated antifreeze.
NOTE:
Do not use propylene glycol.
Fully-formulated antifreeze has the following properties:
It protects the radiator and engine from freezing.
It provides protection against corrosion and cavitation for all components in the cooling
system.
It raises the boiling point of the coolant. This slows the rate of evaporation, avoiding
coolant loss at high temperatures.
5.3.2
Water containing no additives is not suitable as a coolant, even if no antifreeze protection is
needed.
The water used in the coolant must comply with certain requirements, which are not always
satisfied by drinking water. If water quality is inadequate, the water must undergo suitable
treatment.
The following types of water are preferred for use in coolant:
Distilled water
Water purified by reverse osmosis
De-ionized water
All information subject to change without notice.
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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Fully Formulated Antifreeze
Water
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MBE 4000 SERVICE MANUAL
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