2010 Hyundai Sonata cooling

2
DRIVING YOUR HYUNDAI
17
SMOOTH CORNERINGC150A01A-AATAvoid braking or gear changing in corners,
especially when roads are wet. Ideally,
corners should always be taken under
gentle acceleration. If you follow these
suggestions, tire wear will be held to a
minimum.
C160A01A-AATThe more severe weather conditions of
winter result in greater wear and other
problems. To minimize the problems of
winter driving, you should follow these
suggestions:C160B01A-AATSnowy or Icy ConditionsTo drive your vehicle in deep snow, it may
be necessary to use snow tires or to install
tire chains on your tires. If snow tires are
needed, it is necessary to select tires
equivalent in size and type of the original
equipment tires. Failure to do so may
adversely affect the safety and handling of
your car. Furthermore, speeding, rapid
acceleration, sudden brake applications,
and sharp turns are potentially very
hazardous practices.
During deceleration, use engine braking to
the fullest extent. Sudden brake applications
on snowy or icy roads may cause skids to
occur. You need to keep sufficient distance
between the vehicle in operation in front
and your vehicle. Also, apply the brake
gently. It should be noted that installing tire
chains on the tire will provide a greater
driving force, but will not prevent side skids.NOTE:Tire chains are not legal in all states.
Check state laws before fitting tire
chains.WINTER DRIVING
C160D01A-AATCheck Battery and CablesWinter puts additional burdens on the
battery system. Visually inspect the battery
and cables as described in Section 6. The
level of charge in your battery can be
checked by your Hyundai dealer or a
service station.C160C01A-AATUse High Quality Ethylene Glycol
CoolantYour Hyundai is delivered with high quality
ethylene glycol coolant in the cooling
system. It is the only type of coolant that
should be used because it helps prevent
corrosion in the cooling system, lubricates
the water pump and prevents freezing. Be
sure to replace or replenish your coolant in
accordance with the maintenance
schedule in Section 5. Before winter, have
your coolant tested to assure that its
freezing point is sufficient for the
temperatures anticipated during the winter.

34WHAT TO DO IN AN EMERGENCY
IF THE ENGINE OVERHEATS
!!
!
WARNING:
While the engine is running, keep hair,
hands and clothing away from moving
parts such as the fan and drive belts to
prevent injury.
5. If the water pump drive belt is broken or
engine coolant is leaking out, stop the
engine immediately and call the nearest
Hyundai dealer for assistance.
WARNING:
Do not remove the radiator cap when the
engine is hot. This can allow coolant to be
blown out of the opening and cause se-
rious burns.6. If you cannot find the cause of the
overheat-ing, wait until the engine
temperature has returned to normal.
Then, if coolant has been lost, carefully
add coolant to the reservoir (page 6-9)
to bring the fluid level in the reservoir up
to the halfway mark.
7. Proceed with caution, keeping alert for
further signs of overheating. If
overheating happens again, call a
Hyundai dealer for assistance.
CAUTION:
Serious loss of coolant indicates there is
a leak in the cooling system and this
should be checked as soon as possible
by a Hyundai dealer.
D030A02A-AATIf your temperature gauge indicates over-
heating, you experience a loss of power, or
hear loud pinging or knocking, the engine
is probably too hot. If this happens, you
should:
1. Pull off the road and stop as soon as it
is safe to do so.
2. Place the gear selector lever in "P"
(automatic) or neutral (manual
transaxle) and set the parking brake. If
the air conditioning is on, turn it off.
3. If engine coolant is running out under
the car or steam is coming out from the
hood, stop the engine. Do not open the
hood until the coolant has stopped
running or the steaming has stopped. If
there is no visible loss of engine coolant
and no steam, leave the engine running
and check to be sure the engine cooling
fan is operating. If the fan is not running,
turn the engine off.
4. Check to see if the water pump drive belt
is missing. If it is not missing, check to
see that it is tight. If the drive belt seems
to be satisfactory, check for coolant
leaking from the radiator, hoses or under
the car. (If the air conditioning had been
in use, it is normal for cold water to be
draining from it when you stop).

6
DO-IT-YOURSELF MAINTENANCE
9
G050B01A-AATRecommended Engine CoolantUse 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.
G050C01NF-GATTo Check the Coolant LevelThe 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
it up to "F". If the level is low, inspect for
coolant leaks and recheck the fluid level
frequently. If the level drops again, visit
your Hyundai dealer for an inspection and
diagnosis of the reason.
G050C01NFG050D01NF-GAT
To Change the Engine CoolantThe 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
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. Ambient
temperature
°F (°C)
5 (-15)
-13 (-25)
-31 (-35)
-49 (-45)
65%
60%
50%
40% 35%
40%
50%
60%Water Antifreeze
solution Engine Coolant concentration

6
DO-IT-YOURSELF MAINTENANCE
10
3. Be sure your drain receptacle is in place.
Open the drain cock on the radiator.
Allow all the engine coolant to drain
from the cooling system, and then
securely close the drain cock.
4. Check Section 9 for the capacity of the
cooling system in your car. Then,
following the manufacturer's directions
on the engine coolant container, add
the appropriate quantity of coolant to
the radiator.
5. Slowly fill the radiator with the proper
coolant mixture (see the "Recom-
mended Engine Coolant in previous
page) until the fluid level stays up in the
radiator neck. And pump the radiator
hose in order to bleed the air.
HNF5008
2. Wrap a thick cloth around the radiator
cap and slowly turn the radiator cap
counterclockwise without pressing
down on it, until it stops. This relieves
any pressure remaining in the cooling
system. When you are sure that all the
pressure has been released, remove
the radiator cap by pushing down and
turning counterclockwise.
G050D02NF-A
G050D01NF
6. Run the engine at idle until the coolant
circulates. If the cooling fan operates
and the coolant starts to circulate, add
the coolant to the reservoir.
7. To bleed the air in the cooling system,
repeat procedure 6 until the cooling fan
operates 3~5 times.
8. Replace the radiator cap and turn it until
tightly installed. And then, add coolant
to the reservoir until the level is between
"L" and "F".
9. Stop the engine and check the coolant
level when the engine is cool. The level
of the coolant should be the "L" and "F"
lines on the reservoir. If the level is
below the "L" line, repeat the procedure
4~8 until the level between "L" and "F".

6
DO-IT-YOURSELF MAINTENANCE
11
!!
10. Replace the reservoir cap and check to
be sure the drain cock and the radiator
cap are fully closed and not leaking.
CAUTION:
Recheck after a few days and add the
coolant if the level is below the "L" level.
WARNING:
The cooling fan is controlled by engine
coolant temperature and may
sometimes operate even when the
engine is not running. Use extreme
caution when working near the blades of
the coolant fan so that you are not injured
by a rotating fan blade. As the engine
coolant temperature decreases, the fan
will automatically shut off. This is a
normal condition.
CAUTION:
o Operating your vehicle without using
a proper air cleaner filter in place can
result in excessive engine wear.
o When removing the air cleaner filter,
be careful that dust or dirt does not
enter the air intake. These may result
in damage to the air cleaner filter.
!
CHANGING THE AIR
CLEANER FILTERG070A03Y-AATThe replacement of the air cleaner filter is
performed in the following manner.
1. Unsnap the clips around the cover.
2. When this is done, the cover can be
lifted off, the old filter removed and the
new filter put in its place.
Genuine Hyundai replacement parts are
recommended.
ONF078011

6
DO-IT-YOURSELF MAINTENANCE
17
CHECKING THE BRAKES!
G120B01A-AATChecking the Brake Fluid Level
WARNING:Use caution when handling brake fluid. It
can damage your vision if it gets into
your eyes. It will also damage your
vehicle's paint if spilled on it and not
removed immediately.
!
WARNING:
The cooling fan is controlled by engine
coolant temperature and may
sometimes operate even when the
engine is not running. Use extreme
caution when working near the blades of
the cooling fan so that you are not injured
by a rotating fan blade. As the engine
coolant temperature decreases, the fan
will automatically shut off. This is a
normal condition.
G120A01A-AAT
CAUTION:
Because brakes are essential to the
safe operation of the car, it is suggested
that they be checked and inspected by
your Hyundai dealer. The brakes should
be checked and inspected for wear at
those intervals specified in the vehicle
maintenance schedule in Section 5.
!
G120D01A-AATTo Check the Fluid LevelThe fluid level in the brake fluid reservoir
should be checked periodically. The level
should be between the "MIN" and "MAX"
marks on the side of the reservoir. If the
level is at or below the "MIN" mark, carefully
add fluid to bring it up to "MAX". Do not
overfill.G120C02A-AATRecommended Brake FluidUse only hydraulic brake fluid conforming
to DOT 3 or DOT 4 specifications in your
braking system. Follow the instructions
printed on the container.

6
DO-IT-YOURSELF MAINTENANCE
18
G140C01A-AATLubricationTo lubricate the compressor and the seals
in the system, the air conditioning should
be run for at least 10 minutes each week.
This is particularly important during cool
weather when the air conditioning system
is not otherwise in use.
!
G120E02A-AATAdding Brake Fluid
WARNING:Handle brake fluid carefully. It can dam-
age your vision if it gets into your eyes.
Use only DOT 3 or DOT 4 specification
fluid from a sealed container. Do not
allow the fluid can or reservoir to remain
open any longer than required. This will
prevent entry of dirt and moisture which
can damage the brake system and cause
improper operation.
To add brake fluid, first wipe away any dirt,
then unscrew the fluid reservoir cap. Slowly
pour the recommended fluid into the res-
ervoir. Do not overfill. Carefully replace the
cap on the reservoir and tighten.
AIR CONDITIONING CARE!
G140A01A-AATKeeping the Condenser CleanThe air conditioning condenser (and
engine radiator) should be checked
periodically for accumulation of dirt, dead
insects, leaves, etc. These can interfere
with maximum cooling efficiency. When
removing such accumulations, brush or
hose them away carefully to avoid bending
the cooling fans.G140B01A-AATChecking the Air Conditioning Op-
eration1. Start the engine and let it run at a fast idle
for several minutes with the air
conditioning set at the maximum cold
setting.
2. If the air coming out of the in-dash vents
is not cold, have the air conditioning
system inspected by your Hyundai
dealer.
CAUTION:
Running the air conditioning system for
extended periods of time with a low re-
frigerant level may damage the
compressor.
ONF078006

6
DO-IT-YOURSELF MAINTENANCE
26
G240A01A-AATPOWER STEERING HOSESIt is suggested that you check the power
steering hose connections for fluid leakage
at those intervals specified in the vehicle
maintenance schedule in Section 5.
The power steering hoses should be
replaced if there is severe surface crack-
ing, pulling, scuffing or worn spots.
Deterioration of the hose could cause
premature failure.
POWER STEERING FLUID
LEVELG230A01NF-AAT
Recommended FluidUse PSF-4 type fluidNOTE:Do not start the engine when the power
steering oil reservoir is empty.
ONF078007
The power steering fluid level should be
checked regularly. To check the power
steering fluid level, be sure the engine is
"OFF", then check to make certain that the
power steering fluid level is between the
"MAX" and "MIN" level markings on the
fluid reservoir.NOTE:Grinding noise from the power steering
pump may be heard immediately after
the engine is started in extremely cold
conditions (below - 4°F). If the noise stops
during warm up, there is no abnormal
function in the system. It is due to a
power steering fluid characteristic in
extremely cold conditions.
CHECKING ELECTRIC COOLING
FANS!
G220A01A-AAT
WARNING:
The cooling fan is controlled by engine
coolant temperature and may
sometimes operate even when the
engine is not running. Use extreme
caution when working near the blades of
the cooling fan, so that you are not injured
by a rotating fan blade. As the engine
coolant temperature decreases the fan
will automatically shut off. This is a
normal condition.G220B01NF-GATChecking Engine Cooling FanThe engine cooling fan should come on
automatically if the engine coolant
temperature is high or whenever the air
conditioning is in operation.