Hyundai Sonata 1991 Shop Manual page 106

GENERAL
RELATION BETWEEN COOLANT CONCENTRATION AND SPECIFIC GRAVITY
Y25CJOA
Coolant temperature °C (OF) and specific gravity
Freezing Safe operating
Coolant
temperature temperature concentration
10 (50) 20 (68) 30 (86) 40 (104)
50 (122) °C (OF)
°C (OF)
(Specific volume)
1.054 1.050 1.046 1.042
1.036
-16 (3.2) -11 (12.2)
30%
1.063 1.058
1.054 1.049 1.044
-20 (-4)
-15 (5) 35%
1.071
1.067 1.062 1.057
1.052
-25 (-13)
-20 (-4)
40%
1.079
1.074 1.069 1.064 1.058 -30 (-22) -25 (-13) 45%
·1.087
1.082 1.076 1.070
1.064
-36 (-32.8)
-31 (-23.8) 50%
1.095 1.090 1.084
1.077 1.070
-42 (-44) -37 (-35) 55%
1.103 1.098
1.092 1.084 1.076
-50 (-58) -45 (-49)
60%
Example
The safe operating temperature is -15°C (5°F) when the measured specific gravity is 1.058 at coolant temperature
of 20°C (68°F).
CAUTION
If the concentration of the coolant is below 30%, the anti-corrosion property will be adversely affected. In
addition, if the concentration is above 60%, both the anti-freeze and engine cooling properties will decrease,
affecting the engine adversely. For these reasons, be sure to maintain the concentration level within the spec-
ified range.
Do not use togtlther with another brand.
RECOMMENDED COOLANT
Antifreeze
ETHYLENE GLYCOL
BASE FOR ALUMINUM
25-6
Mixture ratio of anti-freeze in coolant
50%
Y25CKOA