Coolant And Antifreeze Specifications; Coolant Specifications; Recommended Types Of Llc's (Long Life Coolant) - Mitsubishi SL-Series Operation Manual

COOLANT AND ANTIFREEZE SPECIFICATIONS

9 COOLANT AND ANTIFREEZE SPECIFICATIONS
9.1

Coolant specifications

Water used in the engine cooling system must be
soft, or as free from scale forming minerals as
possible and it has to meet the requirements
shown in the "Coolant Specifications" chart.
Item
pH, 25°C (77°F)
Electrical conductivity,
25°C (77°F)
Total hardness
M alkalinity
Chlorine ion
Sulfuric acid ion
Total iron
Silica
Residue from
evaporation
Table 10 Coolant specifications
The values indicated in ( ) are the limits set forth
by Mitsubishi. In addition to the items specified
above, turbidity is specified to be <15 mg/l.
9.2 Recommended types of LLC's
(Long Life Coolant)
For Mitsubishi diesel engines, all-season, non-
amine type LLC's or equivalents are
recommended.
36 / 44
Chemical
Unit
symbol
- -
Ω
- µ /cm
CaCO PPM
3
CaCO PPM
3
-
Cl PPM
2
–
SO PPM
4
Fe PPM
SiO PPM
2
- PPM
NOTE
Harmful chemical properties and substances
contained in water (as coolant) must not exceed
the Mitsubishi limits. They are tolerable up to the
limits shown in the chart below.
Recommended
limit
6.5 to 8.5
(6.5 to 8.0)
< 400
(< 250)
< 100
(< 95)
< 150
(< 70)
< 100
(< 100)
< 100
(< 50)
< 1.0
(< 1.0)
< 50
(-)
< 400
(< 250)
9.2.1 Features of recommended brands
• No amines (methyl amines, ethyl amines, n-
propyl amines, etc., all being derivatives of
ammonia, NH
• Silicate and borate are not contained.
• Close to neutral on the pH scale, and hence,
slightly basic (alkaline).
• Balanced additive ingredients; some being
substitutes for amines.
• Long life (the coolant with 30% concentration,
for example, retains its effectiveness for more
than 2 years).
ENGLISH Operation Manual Mitsubishi SL-Series diesel engines
Main malign effect
Corrosion
and rust formation
O
O
-
-
O
-
-
-
) are contained.
3
Version 08/2004
Scale
O
O
O
O
-
-
O
O
O