37 / 44
Operation Manual Mitsubishi SL-Series diesel engines
Version 08/2004
COOLANT AND ANTIFREEZE SPECIFICATIONS
ENGLISH
)
9.3
How to use non-amine type
LLC
1.
The engine coolant with any of the
recommended additives should be changed
every 2 years.
2.
The proper concentration of LLC is from 30%
to 60% all year round. Aim at a temperature
level which is 5°C (9°F) lower than the
expected lowest temperature. LLC of less
than 30% concentration does not provide
sufficient corrosion protection. Concentrations
over 60% adversely affect freeze protection
and heat transfer rates. When adding coolant,
use LLC of the same concentration.
9.4
Why LLC?
Today's full-blown trend is toward smaller and
more lightweight engines, higher output, lower fuel
consumption, and lower exhaust emission levels.
Engine application has also expanded. In most
applications, the engine coolant is compelled to
withstand severe conditions such as continuous
high-power operation with a higher coolant
temperature and a higher speed of coolant
recirculation in the cooling circuit. Many materials
involved in the circuit (such as steel, aluminum,
copper, solder, and rubber) are also subject to
severe servicing. These materials differ in ionizing
tendency and this difference promotes cavitation
and deterioration through the medium of engine
coolant. The ideal of breaking the link between
cause and effect to preserve the circuit can be
realized by using LLC.
9.5
How LLC works
LLC contains several chemicals in such
proportions as to produce a chemical reaction that
suppresses corrosion of the engine parts in
contact with coolant. "Corrosion" is the result of a
phenomenon called "ionization."
The power of LLC to defeat the ionic reaction is
generally subject to wear and the engine coolant
becomes increasingly weak at that time.
Moreover, if its chemicals are not properly
proportioned to match the circuit metals which
WARNING
LLC is toxic and can cause personal injury if it
comes into contact with the skin or the eyes. If
LLC gets in your eyes, wash them with water
immediately and see a doctor at once.
NOTE
When using any other LLC, refer to the coolant
mixture chart shown on the container.
WARNING
Consult your Mitsubishi dealer for disposal of a
used coolant containing LLC.
No
n-amine
type
Ambient temperature, °C
(°F)
-10
(14)
-20
(-4)
-30
(-22)
-45
(-49)
LLC concentration, %
30
40
50
60
Table 11
Recommended LLC concentrations
(reference)
