6-1
Chapter 6 COOLANT
Note: In this operation manual, the word "coolant" represents the liquid combined water and LLC.
Recommended water for coolant
Use soft water for the engine cooling system. The water quality must meet the requirements in the Table below.
Basically, the water quality should be within the recommended value, however, up to the limit is acceptable.
Note: Figures in parentheses are the standard value. In addition to the items specified above, turbidity is specified
to be below 15 mg/liter.
Long life coolant (LLC)
&$87,21
Should coolant or LLC be accidentally swallowed, induce vomiting immediately and seek medical attention. If LLC
should enter eyes, flush immediately with plenty of water and seek medical attention.
Be sure to use Mitsubishi genuine long life coolant (LLC) “GLASSY long life coolant (Ethylene glycol type)” or “PG
GLASSY long life coolant (Non-amine type)” as coolant. When using other brand LLCs by necessity, be sure to use
the LLC that meets the Mitsubishi specification. Mitsubishi heavy industries, Ltd. disclaim the warranty calim con-
cerning mulfunctions caused by the use of LLC that does not meet the Mitsubishi specification.
Genuine LLC
Mitsubishi Heavy Industries, Ltd. recommends the use
of our genuine long life coolant “GLASSY long life
coolant (Ethylene glycol type)”, and Eco-friendly prod-
uct “PG GLASSY long life coolant (Non-amine type)”,
which are most appropriate coolant for Mitsubishi die-
sel engine.
Fig. 6-1 GLASSY - LLC
Table 6-1 Water quality standards
Item
Chemical
symbol
Unit Recommended Limit
Main adverse effect
Corrosion
and rust
Scale
formation
pH (25°C [77°F]) - - 6.5 to 8.0 6.5 to 8.5
○○
Electrical conductivity
(25°C [77°F])
-mS/m<25 <40
○○
Total hardness CaCO
3 ppm <95 <100 -
○
M alkalinity CaCO
3 ppm <70 <150 -
○
Chlorine ion
Cl
-
ppm <100 <100
○
-
Sulfuric acid ion
SO
2
4-
ppm <50 <100
○
-
Total iron Fe ppm <1.0 <1.0 -
○
Silica SiO
2 ppm - <50 -
○
Residue from evaporation - ppm <250 <400 -
○
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