cooling Hyundai Sonata 2011 User Guide

719
Maintenance
Air cleaner filterA Genuine HYUNDAI air cleaner filter is
recommended when the filter is
replaced.Spark plugsMake sure to install new spark plugs of
the correct heat range.Valve clearance Inspect excessive valve noise and/or
engine vibration and adjust if necessary.
An authorized HYUNDAI dealer should
perform the operation.Cooling systemCheck cooling system components, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts.
CoolantThe coolant should be changed at the
intervals specified in the maintenance
schedule.Manual transaxle fluid
(if equipped)Inspect the manual transaxle fluid
according to the maintenance schedule.Automatic transaxle fluid
(if equipped)Automatic transaxle fluid should not be
checked under normal usage conditions.
But in severe conditions, the fluid should
be changed at an authorized HYUNDAI
dealer in accordance to the scheduled
maintenance at the beginning of this
chapter.✽NOTICEAutomatic transaxle fluid color is basi-
cally red.
As the vehicle is driven, the automatic
transaxle fluid will begin to look darker.
It is normal condition and you should
not judge the need to replace the fluid
based upon the changed color.
Brake hoses and linesVisually check for proper installation,
chafing, cracks, deterioration and any
leakage. Replace any deteriorated or
damaged parts immediately.Brake/clutch fluidCheck brake fluid level in the brake fluid
reservoir. The level should be between
“MIN” and “MAX” marks on the side of
the reservoir. Use only hydraulic brake
fluid conforming to DOT 3 or DOT 4
specification.
CAUTION
The use of a non-specified fluid
could result in transaxle malfunc-tion and failure.
Use only specified automatictransaxle fluid. (Refer to“Recommended lubricants andcapacities” in section 8.)

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723
Maintenance
The high-pressure cooling system has a
reservoir filled with year-round antifreeze
coolant. The reservoir is filled at the fac-
tory.
Check the antifreeze protection and
coolant level at least once a year, at the
beginning of the winter season, and
before traveling to a colder climate.Checking the coolant level
Check the condition and connections of
all cooling system hoses and heater
hoses. Replace any swollen or deterio-
rated hoses.
The coolant level should be filled
between F and L marks on the side of the
coolant reservoir when the engine is
cool.
If the coolant level is low, add enough
specified coolant to provide protection
against freezing and corrosion. Bring the
level to F, but do not overfill. If frequent
additions are required, see an authorized
HYUNDAI dealer for a cooling system
inspection.

OYF079005N
(Continued)
• Turn the engine off and wait untilit cools down. Use extreme care
when removing the radiator cap.
Wrap a thick towel around it, and
turn it counterclockwise slowly to
the first stop. Step back while 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 counterclockwise to
remove it.
• Even if the engine is not operat- ing, do not remove the radiator
cap or the drain plug while the
engine and radiator are hot. Hot
coolant and steam may still blow
out under pressure, causing seri-
ous injury.
ENGINE COOLANT
WARNING
- Removing
radiator cap
• Never attempt to remove the radi-
ator cap while the engine is oper-
ating or hot. Doing so might lead
to cooling system and engine
damage and could result in seri-
ous personal injury from escap-
ing hot coolant or steam.
(Continued)

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I3
Index
California perchlorate notice ··················\
··················\
·····7-73
Capacities (Lubricants) ··················\
··················\
················8-4
CareExterior care ··················\
··················\
··················\
········7-64
Interior care ··················\
··················\
··················\
·········7-68
Tire care··················\
··················\
··················\
···············7-36
Cargo weight ··················\
··················\
··················\
············5-50
Center console storage ··················\
··················\
···············4-98
Central door lock switch··················\
··················\
············4-19
Certification label ··················\
··················\
···············5-48, 8-6
Changing tires ··················\
··················\
··················\
··········6-13
Chains Tire chains ··················\
··················\
··················\
···········5-42
Checking tire inflation pressure··················\
··················\
·7-37
Child restraint system ··················\
··················\
················3-29 Passenger seat belt ··················\
··················\
················3-31
Tether anchor system··················\
··················\
·············3-33
Lower anchor system ··················\
··················\
············3-35
Child-protector rear door lock ··················\
··················\
···4-21
Climate control system (Automatic) ··················\
···········4-91 Air conditioning ··················\
··················\
··················\
··4-94
Automatic heating and air conditioning··················\
··4-89
Manual heating and air conditioning ··················\
······4-90
Climate control system (Manual) ··················\
················4-79 Air conditioning ··················\
··················\
··················\
··4-85
Climate control air filter··················\
··················\
········4-87
Heating and air conditioning··················\
··················\
·4-80 Climate control air filter ··················\
··················\
············4-89
Climate control air filter ··················\
··················\
············7-29
Clock (Digital) ··················\
··················\
··················\
·······4-102
Clothes hanger ··················\
··················\
··················\
·······4-102
Combined instrument, see instrument cluster ···············4-46
Compact spare tire ··················\
··················\
··················\
···6-18
Compact spare tire replacement ··················\
··················\
7-41
Compass mirror, see the Electric chromic mirror (ECM)
with homeLink system and compass ··················\
······4-37
Consumer information ··················\
··················\
·················8-8
Coolant ··················\
··················\
··················\
··················\
···7-23
Cooling fluid, see engine coolant ··················\
················7-23
Crankcase emission control system ··················\
·············7-70
Cruise control system ··················\
··················\
················5-31
Cup holder ··················\
··················\
··················\
·············4-100
Curtain air bag ··················\
··················\
··················\
·········3-54
Dashboard, see instrument cluster ··················\
···············4-46
Dashboard illumination, see instrument panel illumination ··················\
··················\
··················\
·········4-47
Daytime running light··················\
··················\
················4-69
Defogging (Windshield) ··················\
··················\
············4-95
Defogging logic (Windshield) ··················\
··················\
···4-97
Defroster (Rear window) ··················\
··················\
···········4-78
Defrosting (Windshield) ··················\
··················\
············4-95
Digital clock··················\
··················\
··················\
···········4-102
Dimensions ··················\
··················\
··················\
················8-2C
D

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