Detroit Diesel 60 Series Operator's Manual page 63

Water Requirements
Distilled, reverse osmosis purified, or
de-ionized water which eliminates the
adverse effects of minerals in tap water
is preferred. High levels of dissolved
chlorides, sulfates, magnesium, and
calcium in some tap water causes scale
deposits, sludge deposits and/or corro-
sion. These deposits been shown to
result in water pump failures and poor
heat transfer, resulting in over-heating. If
tap water is used, the mineral content in
the water must be below the maximum
allowable limits listed in Table 15.
Maximum Allowable
Parts
per Million
Chlorides 40*
Sulfates 100*
Total Dissolved 340
Solids
Total Hardness
Magnesium 170
& Calcium
*
Limits Currently Under Review
Table 15. Satisfactory Water Limits
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 recom-
mended for use in Series 60 engines:
1. All antifreezes and coolants con-
taining phosphate should be avoid-
ed. Drop out, overheating, and water
pump seal failures can result from 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 protec-
tion, and are not suitable for use in
Detroit Diesel engines.
Grains
3. Methyl alcohol-based antifreeze
per Gallon
must not be used because of its
effect on the non-metallic compo-
2.5
nents of the cooling system and its
5.8
low boiling point.
20
4. Methoxy propanol-based anti-
freeze must not be used because it
is not compatible with fluoroelastomer
10
seals found in the cooling system.
5. Glycol-based coolants formulated
for heating/ventilation/air condi-
tioning (HVAC) should not be used.
These coolants generally contain high
levels of phosphates, which can
deposit on hot internal engine sur-
faces and reduce heat transfer.
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