G-18
WG972-E2, DF972-E2, WSM
G GENERAL
Anti-Freeze
•There are two types of anti-freeze available: use the permanent
type (PT) for this engine.
•Before adding anti-freeze for the first time, clean the radiator
interior by pouring fresh, soft water and draining it a few times.
•The procedure for mixing water and anti-freeze differs according
to the make of the anti-freeze and the ambient temperature.
Basically, it should be referred to SAE J1034 standard, more
specifically also to SAE J814c.
•Mix the anti-freeze with fresh, soft water, and then fill into the
radiator.
■
•When the anti-freeze is mixed with fresh, soft water, the anti-
freeze mixing ratio must be less than 50 %.
* At 1.013 × 100000 Pa (760 mmHg) pressure (atmospheric). A
higher boiling point is obtained by using a radiator pressure cap
which permits the development of pressure within the cooling
system.
■
•The above data represents industrial standards that
necessitate a minimum glycol content in the concentrated
anti-freeze.
•When the coolant level drops due to evaporation, add fresh,
soft water only to keep the anti-freeze mixing ratio less than
50 %. In case of leakage, add anti-freeze and fresh, soft
water in the specified mixing ratio.
•Anti-freeze absorbs moisture. Keep unused anti-freeze in a
tightly sealed container.
•Do not use radiator cleaning agents when anti-freeze has
been added to the coolant.
(Anti-freeze contains an anti-corrosive agent, which will
react with the radiator cleaning agent forming sludge which
will affect the engine parts.)
W1039218
Vol %
anti-freeze
Freezing point Boiling point*
°C °F °C °F
40 –24 –11.2 106 222.8
50 –37 –34.6 108 226.4
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