22
OTHER COOLANTS
Other ethylene glycol or propylene glycol base coolants
may be used if they meet the following specication :
• Pre-mix coolant meeting ASTM D6210 requirements.
• Coolant concentrate meeting ASTM D6210
requirements in a 40-60 % mixture of concentrate
with appropriate water.
If coolant meeting one of these specications is
unavailable, use a coolant concentrate or pre-mix
coolant that has a minimum of the following chemical
and physical properties :
• Provides cylinder liner cavitation protection
according to a proven and recorded method or a fleet
study run at or above 60 % load capacity.
• Is formulated with a nitrite-free additive package.
• Protects the cooling system metals (cast iron,
aluminum alloys, and copper alloys such as brass)
from corrosion.
FREEZE PROTECTION
The relative concentrations of glycol and water in the
engine coolant determine the freezing protection limit.
IMPORTANT !
DO NOT use a coolant-water mixture greater than 60%
ethylene glycol or 60% propylene glycol. Refer to the ta-
ble below :
Ethylene Glycol Freeze protection limit
40% -24°C (-12°F)
50% -37°C (-34°F)
60% -52°C (-62°F)
Propylene Glycol Freeze protection limit
40% -24°C (-12°F)
50% -37°C (-34°F)
60% -52°C (-62°F)
REQUIRED QUANTITY OF COOLANT VS
COOLING SYSTEM CAPACITY
See ANNEX 1: VOLUME OF GLYCOL
OPERATING ENGINE IN WARM TEMPERA-
TURE CLIMATES
Nanni engines are designed to operate with
recommended engine coolants quoted in this chapter.
Always use a recommended engine coolant, even when
operating in geographical areas where freeze protection
is not required (internal engine corrosion protection).
IMPORTANT !
Tap clean water may be used as coolant substitute in
emergency situations only. Contact a Nanni represent-
ative as soon as it is possible for assistance. Get this
water flushed as soon as possible.
Running the engine with water only will make this sub-
stitute coolant to foam, aluminium and iron parts of the
engine will be subject to fast internal corrosion, along
with scaling, and cavitation occurrences, even with
coolant conditioners.
When cooling system has been drained from the engine,
rell with recommended coolant as soon as possible.
S03 FLUIDS
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