Isuzu AU-4LE1T, Руководство по обслуживанию

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2. COOLANT
Where the atmospheric temperature falls below freezing point, the cooling
system should be drained after engine operation, but to eliminate the need
for repeated draining and refilling, the use of anti-freeze solution is highly
recommended.
A 50/50 mix Ethylene glycol base antifreeze/tap water (soft water), distilled
water or demineralized water.
(which provides protection to –37°C (–34°F) is recommended for use in
these ISUZU diesel engines).
Concentrations over 65% adversely affect freeze protection, heat transfer
rates, and silicate stability which may cause water pump leakage.
Never exceed a 60/40 mix antifreeze/tap water (soft water), distilled water
or demineralized water.
(which provides protection to about –50°C (–58°F)).
WARNING:
Under some conditions the ethylene glycol in the engine
coolant is combustible. To help avoid being burned when
adding engine coolant, do not spill it on the exhaust system or
engine parts that may be hot. If there is any question, have
this service performed by a qualified technician.