2016 Hyundai Sonata engine

7-22
Maintenance
ENGINE COOLANT
The high-pressure cooling system
has a reservoir filled with year-round
antifreeze coolant. The reservoir is
filled at the factory.
Check the antifreeze protection and
coolant concentration level at least
once a year, at the beginning of the
winter season, and before travelling
to a colder climate.Checking the coolant level
Removing radiator
cap
•Never attempt to remove the
radiator cap whilst the engine
is operating or hot. Doing so
might lead to cooling system
and engine damage and could
result in serious personal
injury from escaping hot
coolant or steam.
(Continued)
WARNING
(Continued)
•Turn the engine off and wait
until it cools down. Use
extreme care when removing
the radiator cap. Wrap a thick
towel around it, and turn it
anticlockwise slowly to the
first stop. Step back whilst the
pressure is released from the
cooling system.
When you are sure all the
pressure has been released,
press down on the cap, using
a thick towel, and continue
turning anticlockwise to
remove it.
•Even if the engine is not oper-
ating, do not remove the radi-
ator cap or the drain plug
whilst the engine and radiator
are hot. Hot coolant and
steam may still blow out
under pressure, causing seri-
ous injury.
•When the engine overheats
from low engine coolant, sud-
denly adding engine coolant
may cause cracks in the
engine. To prevent damage,
add engine coolant slowly in
small quantities.
•Do not drive with no engine
coolant. It may cause water
pump failure and engine
seizure, etc.
CAUTION
OLF074007N

7-23
7
Maintenance
Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen
or deteriorated hoses.
The coolant level should be filled
between F (MAX) and L (MIN) marks
on the side of the coolant reservoir
when the engine is cool.
If the coolant level is low, add enough
distilled (deionized) or soft water.
Bring the level to F (MAX), but do not
overfill.
If frequent additions are required, we
recommend that the system be
inspected by an authorised HYUNDAI
dealer.
Recommended engine coolant
• When adding coolant, use only
deionized water or soft water for
your vehicle and never mix hard
water in the coolant filled at the fac-
tory. An improper coolant mixture
can result in serious malfunction or
engine damage.
• The engine in your vehicle has alu-
minium engine parts and must be
protected by an ethylene-glycol-
based coolant to prevent corrosion
and freezing.
• DO NOT USE alcohol or methanol
coolant or mix them with the spec-
ified coolant.
• Do not use a solution that contains
more than 60% antifreeze or less
than 35% antifreeze, which would
reduce the effectiveness of the
solution.
OLF074006N
The electric motor
(cooling fan) is con-
trolled by engine
coolant temperature,
refrigerant pressure
and vehicle speed. It may some-
times 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 electric motor
will automatically shut off. This
is a normal condition.
The electric motor (cooling fan)
may operate until you discon-
nect the negative battery cable.
WARNING

7-24
Maintenance
For mixture percentage, refer to the
following table.
Information
If in doubt about the mix ratio, a
50% water and 50% antifreeze mix
is the easiest to mix together as it
will be the same quantity of each. It
is suitable to use for most temper-
ature ranges of -35°C (-31°F) and
higher.
Changing the coolant
We recommend that the coolant be
replaced by an authorised HYUNDAI
dealer.
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Ambient
TemperatureMixture Percentage
(volume)
Antifreeze Water
-15°C (5°F) 35 65
-25°C (-13°F) 40 60
-35°C (-31°F) 50 50
-45°C (-49°F) 60 40Coolant
•
Do not use radiator coolant or
antifreeze in the washer fluid
reservoir.
•Radiator coolant can severely
obscure visibility when
sprayed on the windscreen
and may cause loss of vehicle
control or damage to paint
and body trim.
WARNING
Put a thick cloth or fabric
around the radiator cap before
refilling the coolant in order to
prevent the coolant from over-
flowing into engine parts such
as generator.
CAUTION

7-26
Maintenance
When changing and adding
brake fluid, handle it carefully.
Do not let it come in contact
with your eyes. If brake fluid
should come in contact with
your eyes, immediately flush
them with a large quantity of
fresh tap water. Have your eyes
examined by a doctor as soon
as possible.
WARNING
Do not allow brake fluid to con-
tact the vehicle's body paint, as
paint damage will result. Brake
fluid, which has been exposed
to open air for an extended time
should never be used as its
quality cannot be guaranteed. It
should be disposed of properly.
Don't put in the wrong kind of
fluid.
A few drops of mineral-based
oil, such as engine oil, in your
brake system can damage
brake system parts.
CAUTION

7-29
7
Maintenance
4. Replace the air cleaner filter. 5. Pull up the lever (1) to the LOCK
position.
6. Install the cover and make sure
the inner hooks (2) to be inserted
to holes (3).
7. Check if the cover is firmly
installed.
Information
If the vehicle is operated in
extremely dusty or sandy areas,
replace the element more often
than the usual recommended
intervals (refer to “Maintenance
Under Severe Usage Conditions”
in this chapter).
• Do not drive with the air cleaner
filter removed. This will result in
excessive engine wear.
• When removing the air cleaner
filter, be careful that dust or dirt
does not enter the air intake, or
damage may result.
• Use HYUNDAI genuine parts,
use of non-genuine parts could
damage the air flow sensor.
NOTICE
i
OLF074013OLF074101K

7-34
Maintenance
Battery capacity label
❈The actual battery label in the vehicle
may differ from the illustration.
1. CMF60L-BCI : The HYUNDAI
model name of battery
2. 12V : The nominal voltage
3. 60Ah(20HR) : The nominal capacity
(in Ampere hours)
4. 92RC : The nominal reserve capac-
ity (in min.)
5. 550CCA : The cold-test current in
amperes by SAE
6. 440A : The cold-test current in
amperes by EN (Continued)
•When lifting a plastic-cased
battery, excessive pressure
on the case may cause battery
acid to leak, resulting in per-
sonal injury. Lift with a battery
carrier or with your hands on
opposite corners.
•Never attempt to recharge the
battery when the battery
cables are connected.
•The electrical ignition system
works with high voltage.
Never touch these compo-
nents with the engine running
or the ignition switch is in the
on position.
Failure to follow the above
warnings can result in serious
bodily injury or death.
If you connect unauthorised
electronic devices to the bat-
tery, the battery may be dis-
charged. Never use unautho-
rised devices.
CAUTION
OLMB073072 ■Example

7-35
7
Maintenance
Battery recharging
Your vehicle has a maintenance-free,
calcium-based battery.
• If the battery becomes discharged
in a short time (because, for exam-
ple, the headlamps or interior
lamps were left on whilst the vehi-
cle was not in use), recharge it by
slow trickle (charging) for 10 hours.
• If the battery gradually discharges
because of high electric load whilst
the vehicle is being used, recharge
it at 20-30A for 2 hours.When recharging the battery,
observe the following precau-
tions:
•The battery must be removed
from the vehicle and placed in
an area with good ventilation.
•Do not allow cigarettes, sparks,
or flames near the battery.
•Watch the battery during
charging, and stop or reduce
the charging rate if the battery
cells begin gassing (boiling)
violently or if the temperature
of the electrolyte of any cell
exceeds 49°C (120°F).
•Wear eye protection when
checking the battery during
charging.
(Continued)
WARNING (Continued)
•Disconnect the battery charg-
er in the following order.
1. Turn off the battery charger
main switch.
2. Unhook the negative clamp
from the negative battery
terminal.
3. Unhook the positive clamp
from the positive battery
terminal.
•Before performing mainte-
nance or recharging the bat-
tery, turn off all accessories
and stop the engine.
•The negative battery cable
must be removed first and
installed last when the battery
is disconnected.

7-49
7
Maintenance
FUSES
A vehicle’s electrical system is pro-
tected from electrical overload dam-
age by fuses.
This vehicle has 2 (or 3) fuse panels,
one located in the driver’s side panel
bolster, the other in the engine com-
partment near the battery.
If any of your vehicle’s lights, acces-
sories, or controls do not work, check
the appropriate circuit fuse. If a fuse
has blown, the element inside the
fuse will be melted.
If the electrical system does not work,
first check the driver’s side fuse
panel. Before replacing a blown fuse,
turn the engine and all switches off,
and then disconnect the negative bat-
tery cable. Always replace a blown
fuse with one of the same rating.
If the replacement fuse blows, this indi-
cates an electrical problem. Avoid
using the system involved and immedi-
ately consult an authorised HYUNDAI
dealer.Information
Three kinds of fuses are used:
blade type for lower amperage rat-
ing, cartridge type and multi fuse
for higher amperage ratings.
i
Normal ■Blade type
■Cartridge typeBlown
NormalBlown
NormalBlown
OLF074075
Normal
Blown
■Multi fuse