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)
Be sure to use Mitsubishi Heavy Industries, Ltd. genuine long life coolant (LLC) "GLASSY long life coolant (Ethyl-
ene 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 specification in Mitsubishi Heavy Industries, Ltd. Mitsubishi heavy
industries, Ltd. disclaim the warranty claim concerning malfunctions caused by the use of LLC that does not meet
the following 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 diesel engine
from Mitsubishi Heavy Industries, Ltd.
Fig. 6-1 GLASSY - LLC
Table 6-1 Water quality standards
Item
Chemical
symbol
Unit
Recommend
value
Limit Main adverse effect
pH (25°C [77°F]) - - 6.5 to 8.0 6.5 to 8.5
Corrosion and rust, scale
formation
Electrical cinductivity
(25°C [77°F])
- mS/m < 25 < 40
Corrosion and rust, scale
formation
Total hardness CaCO
3 ppm < 95 < 100 Scale formation
M alkalinity CaCO
3 ppm < 70 < 150 Scale formation
Chlorine ion Cl
-
ppm < 100 < 100 Corrosion and rust
Sulfuric acid ion SO
4
2-
ppm < 50 < 100 Corrosion and rust
Total iron Fe ppm < 1.0 < 1.0 Scale formation
Silica SiO
2 ppm < 30 < 50 Scale formation
Residue from evaporation - ppm < 250 < 400 Scale formation
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.
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