Engine Coolant - HYOSUNG Aquil GV650 Service Manual

5-1 COOLING SYSTEM

ENGINE COOLANT

At the time of manufacture, the cooling system is filled
with a 50 : 50 mixture of distilled water and ethylene gly-
col anti-freeze.
This 50 : 50 mixture will provide the optimum corrosion
protection and excellent heat protection, and will protect
the cooling system from freezing at temperatures above
℃ (-24 ℉ )
-31
If the motorcycle is to be exposed to temperatures
℃ (-24 ℉ ), this mixing ratio should be
below -31
increased up to 55% or 60% according to the figure.
CAUTION
● ● Use a high quality ethylene glycol base anti-
freeze, mixed with distilled water. Do not mix
an alcohol base anti-freeze and different
brands of anti-freeze.
● ● Do not rut in more than 60% anti-freeze or less
than 50%. (Refer to Right figure.)
● ● Do not use a radiator anti-leak additive.
50% Engine coolant including reserve tank capacity
Anti-freeze
Water
● ● You can be injured by scalding fluid or steam if you open the radiator cap when the engine is hot. After the
engine cools, wrap a thick cloth around cap and carefully remove the cap by turning it a quarter turn to
allow pressure to escape and then turn the cap all the way off.
● ● The engine must be cool before servicing the cooling system.
● ● Coolant is harmful;
� � If it comes in contact with skin or eyes, flush with water.
� � If swallowed accidentally, induce vomiting and call physician immediately.
� � Keep it away from children.
0.8ℓ
0.8ℓ
WARNING
Anti-freeze density
50%
55%
60%
Fig.1 Engine coolant density-freezing
point curve.
Density (%)
Fig.2 Engine coolant density-boiling
point curve.
Freezing point
-31℃ (-24℉)
-40℃ (-40℉)
-55℃ (-67℉)
Density (%)
(kgf/㎠)