HYOSUNG TE450 -, Service Manual

Page: 115 / 262

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 glycol anti-freeze.
This 50 : 50 mixture will provide the optimum corro-
sion protection and excellent heat protection, and will
protect the cooling system from freezing at tempera-
tures above -31
℃
(-24
℉
).
If the vehicle is to be exposed to temperatures below
-31
℃
(-24
℉
), this mixing ratio should be 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 put 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
0.7
ℓ
0.7
ℓ
WARNING
� � 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.
Freezing point
Boiling point
Gauge pressure
Density (%)
Fig.1 Engine coolant density-freez-
ing point curve.
Density (%)
Fig.2 Engine coolant density-boiling
point curve.
(kgf/
㎠
)
Anti-freeze density Freezing point
50%
55%
60%
- 31
℃
( - 24
℉
)
- 40
℃
( - 40
℉
)
- 55
℃
( - 67
℉
)
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