2010 Hyundai Sonata radiator cap

1FEATURES OF YOUR HYUNDAI58
!
B290A03A-AATENGINE COOLANT TEMPERATURE
GAUGE
WARNING:Never remove the radiator cap when the
engine is hot. The engine coolant is under
pressure and could erupt and cause
severe burns. Wait until the engine is
cool before adding coolant to the
reservoir.The normal range is approximately in the
middle between "H" and "C". If it moves
across the dial to "H" (HOT), pull over and
stop as soon as possible and turn off the
engine. Then open the hood and, after the
engine has cooled, check the coolant level
(See "If the engine overheats" on the page
3-4.) and the water pump drive belt. If you
suspect cooling system trouble, have your
cooling system checked by a Hyundai dealer
as soon as possible.
ONF048043N
INSTRUMENT CLUSTERB280A02NF-AATFUEL GAUGEThe needle on the gauge indicates the
approximate fuel level in the fuel tank. The
fuel capacity is given in section 9.NOTE:The "
" symbol means, the fuel filler
lid is located on the left side of the ve-
hicle.
ONF048044N
CAUTION:
Avoid driving with a very low fuel level. If
you run out of fuel, it could cause the
engine to misfire and result in excessive
loading of the catalytic converter.
!

1
FEATURES OF YOUR HYUNDAI
87
HIGH-MOUNTED REAR STOP
LIGHTB550A02Y-AATIn addition to the lower-mounted rear stop
lights on either side of the car, the high
mounted rear stop light in the center of the
rear window also lights when the brakes
are applied.
B550A01NF-A
REMOTE FUEL-FILLER LID RE-
LEASEB560A04Y-AATThe fuel-filler lid may be opened from
inside the vehicle by pushing the fuel-filler
lid opener switch located on the driver's
door.NOTE:If the fuel-filler lid will not open because
ice has formed around it, tap lightly or
push on the lid to break the ice and
release the lid. Do not pry on the lid. If
necessary, spray around the lid with an
approved de-icer fluid (do not use
radiator anti-freeze) or move the vehicle
to a warm place and allow the ice to melt.
ONF048018L
!
WARNING:
o Gasoline vapors are dangerous. Be-
fore refueling, always stop the engine
and never smoke or allow sparks and
open flames near the filler area.
o Never operate your vehicle without a
filler cap properly installed, flammable
vapors and gasoline could leak out in
dangerous situations such as a
collision or rollover. If the filler cap
must be replaced, only use genuine
Hyundai replacement parts.
HNF2021

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
2
G010B01NF-AATENGINE COMPARTMENT
ONF018003
CAUTION:
When inspecting or servicing the
engine, you should handle tools
and other heavy objects
carefully so that the plastic cover
of the engine is not damaged.
!
1. Engine coolant reservoir
2. Engine oil filler cap
3. Brake fluid reservoir
4. Air cleaner5. Fuse box
6. Negative battery terminal
7. Positive battery terminal
8. Auto transaxle oil dipstick*9. Radiator cap
10. Engine oil dipstick
11. Windshield washer fluid reservoir
12. Power steering fluid reservoir
* : if installedGasoline Engine (2.4L)

6
DO-IT-YOURSELF MAINTENANCE
3
8G010A01NF
G010A01NF-AATGasoline Engine (3.3L)
CAUTION:
When inspecting or servicing the
engine, you should handle tools
and other heavy objects
carefully so that the plastic cover
of the engine is not damaged.
!
1. Engine coolant reservoir
2. Engine oil filler cap
3. Brake fluid reservoir
4. Air cleaner5. Fuse box
6. Negative battery terminal
7. Positive battery terminal
8. Auto transaxle oil dipstick*9. Radiator cap
10. Engine oil dipstick
11. Windshield washer fluid reservoir
12. Power steering fluid reservoir
* : if installed

6
DO-IT-YOURSELF MAINTENANCE
6
!!
G030D01O-AATAdding Oil
1. Remove the oil filler cap by turning it
counter-clockwise.
2. Add oil, then check the level again. Do
not overfill.
3. Replace the cap by turning it clockwise.
The distance between the "F" and "L" marks
is equal to about 1 quart of oil.
CAUTION:
Slowly pour the recommended oil into a
funnel. Do not overfill to avoid damage to
the engine.
WARNING:
Be very careful not to touch the radiator
hose when adding the engine oil as it may
be hot enough to burn you.
If the oil level is close to or below the "L"
mark, add oil until it reaches the "F" mark.
To add oil:
ONF078003
G030D02NF
(3.3L)(2.4L)
CHANGING THE ENGINE OIL AND
FILTERG040A02NF-AAT
HNF5005(3.3L)(2.4L)
G040A01NFOil filter
Oil filler
cap
Oil level
dipstick Oil filler
cap
Oil filter

6
DO-IT-YOURSELF MAINTENANCE
8
CHECKING AND CHANGING THE
ENGINE COOLANT!
G050A01A-AAT
WARNING:
Do not remove the radiator cap when the
engine is hot. When the engine is hot, the
engine coolant is under pressure and
may erupt through the opening if the cap
is removed. You could be seriously
burned if you do not observe this
precaution. Do not remove the radiator
cap until the radiator is cool to the touch.
!
5. Remove the oil filter by turning it counter-
clockwise with a oil filter wrench of the
proper size. A certain amount of oil will
come out when you remove the filter. So be
sure to have your drain pan in place
underneath it.
6. Install a new oil filter in accordance with the
instructions on the carton or on the filter
itself. Do not over-tighten.
Tightening torque:
8.7 ~ 11.6 lb.ft (1.2 ~ 1.6 kgf.m)
Be sure that the mounting surface on the
engine is clean and that the old gasket is
removed completely. Lubricate the new
gasket on the filter with clean engine oil
before installation.
7. Remove the engine oil level dipstick.
8. Refill the crankcase with the recommended
engine oil. Refer to the specification in
chapter 9 for engine oil capacity.
CAUTION:
Slowly pour the recommended oil into a
funnel. Do not overfill to avoid damage to
the engine.
NOTE:Always dispose of used engine oil in an
environmentally acceptable manner. It
is suggested that it be placed in a sealed
container and taken to a service station
for reclamation. Do not pour the oil on the
ground or put it into the household trash.
PROPOSITION 65 WARNING:
Engine oil contains chemicals known to
the State of California to cause cancer,
birth defects and reproductive harm.
Used engine oil may cause irritation or
cancer of the skin if left in contact with
the skin for prolonged periods of time.
Always protect your skin by washing
your hands thoroughly with soap and
warm water as soon as possible after
handling used oil.
!
9. Start the engine and check to be sure no
oil is leaking from the drain plug or oil
filter.
10. Shut off the engine and recheck the oil
level.

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