Hyundai 2009 Sonata Owner's Manual page 224

G050B01A-AAT
Recommended Engine Coolant
Use a high quality ethylene-glycol coolant
in a 50/50 mix with water. The engine
coolant should be compatible with
aluminum engine parts. Additional
corrosion inhibitors or additives should
not be used. The cooling system must be
maintained with the correct concentration
and type of engine coolant to prevent
freezing and corrosion. Never allow the
concentration of antifreeze to exceed the
60% level or go below the 35% level, or
damage to the cooling system may result.
For proper concentration when adding or
replacing the engine coolant, refer to the
following table.
Ambient Engine Coolant concentration
temperature Antifreeze
°F (°C) solution
5 (-15)
35%
-13 (-25)
40%
-31 (-35)
50%
-49 (-45)
60%
G050C01NF-GAT
To Check the Coolant Level
The coolant level can be seen on the side
of the plastic coolant reservoir. The level of
the coolant should be between the "L" and
"F" lines on the reservoir when the engine
is warm with it at idle . If the level is below
the "L" mark, add engine coolant to bring
Water
it up to "F". If the level is low, inspect for
65% coolant leaks and recheck the fluid level
frequently. If the level drops again, visit
60%
your Hyundai dealer for an inspection and
50%
diagnosis of the reason.
40%
G050D01NF-GAT
To Change the Engine Coolant
The engine coolant should be changed at
those intervals specified in the vehicle
maintenance schedule in Section 5.
!
CAUTION:
o Engine coolant can damage the finish
of your car. If you spill engine coolant
on the car, wash it off thoroughly with
clean water.
o The engine in your vehicle has alumi-
num engine parts and must be
G050C01NF
protected by an ethylene-glycol base
coolant to prevent corrosion and freez-
ing.
Do not use hard water. Hard water can
cause engine damage from corro-
sion, overheating or freezing.
1. Park the car on level ground, set the
parking brake and remove the radiator
cap when cool.
6
DO-IT-YOURSELF MAINTENANCE
9