normal maintenance Hyundai Sonata 2018 Owner's Manual

3-130
Convenient features of your vehicle
System Maintenance
Climate control air filter
This filter is installed behind the glove
box. It filters the dust or other pollu-
tants that enter the vehicle through the
heating and air conditioning system.
Have the climate control air filter
replaced by an authorized HYUNDAI
dealer according to the maintenance
schedule. If the car is being driven in
severe conditions such as dusty or
rough roads, more frequent air condi-
tioner filter inspections and changes
are required.
If the air flow rate suddenly decreas-
es, the system should be checked at
an authorized HYUNDAI dealer.
Checking the amount of air conditioner refrigerant andcompressor lubricant
When the amount of refrigerant is
low, the performance of the air con-
ditioning is reduced. Overfilling also
has a negative influence on the air
conditioning system.
Therefore, if abnormal operation is
found, have the system inspected by
an authorized HYUNDAI dealer.
It is important that the correct
type and amount of oil and refrig-
erant is used. Otherwise, damage
to the compressor and abnormal
system operation may occur.
The air conditioning system should
be serviced by an authorized
HYUNDAI dealer.
NOTICE
1LDA5047
Outside airRecirculatedair
Climate control air filter Blower
Evaporatorcore Heater core
Vehicles equipped with
R-1234yf
Because the refriger-
ant is mildly inflam-
mable at very high
pressure, the air con-
ditioning system
should only be serv-
iced by trained and
certified technicians.
It is important that the
correct type and amount of oil
and refrigerant is used.
Otherwise, it may cause dam-
age to the vehicle and personal
injury.
WARNING

3-142
Convenient features of your vehicle
If you operate air conditioner excessively, the difference between
the temperature of the outside air
and that of the windshield could
cause the outer surface of the
windshield to fog up, causing loss
of visibility. In this case, set the
mode selection knob or button to
the position and fan speed
control to the lower speed.
System Maintenance
Climate control air filter
This filter is installed behind the glove
box. It filters the dust or other pollu-
tants that enter the vehicle through the
heating and air conditioning system.
Have the climate control air filter
replaced by an authorized HYUNDAI
dealer according to the maintenance
schedule. If the car is being driven in
severe conditions such as dusty or
rough roads, more frequent air con-
ditioner filter inspections and
changes are required.
If the air flow rate suddenly decreas-
es, the system should be checked at
an authorized HYUNDAI dealer.
Checking the amount of air conditioner refrigerant andcompressor lubricant
When the amount of refrigerant is
low, the performance of the air con-
ditioning is reduced. Overfilling also
has a negative influence on the air
conditioning system.
Therefore, if abnormal operation is
found, have the system inspected by
an authorized HYUNDAI dealer.
It is important that the correct
type and amount of oil and refrig-
erant is used. Otherwise, damage
to the compressor and abnormal
system operation may occur.
NOTICE
1LDA5047
Outside air
Recirculatedair
Climate control air filter Blower
Evaporatorcore Heater core

7
Maintenance
7
Maintenance
Engine Compartment ............................................7-3
Maintenance Services ...........................................7-6
Owner's Responsibility .....................................................7-6
Owner Maintenance Precautions..................................7-6
Owner Maintenance ..............................................7-7
Owner Maintenance Schedule .......................................7-8
Scheduled Maintenance Services........................7-9
Normal Maintenance Schedule
(Gamma 1.6 T-GDI/Theta 2.0 T-GDI)..........................7-10
Maintenance Under Severe Usage Conditions
(Gamma 1.6 T-GDI/Theta 2.0 T-GDI)..........................7-13
Normal Maintenance Schedule (Theta 2.4 GDI) ......7-15
Maintenance Under Severe Usage Conditions
(Theta 2.4 GDI) .................................................................7-18
Explanation of Scheduled Maintenance Items ..7-20
Engine Oil and Filter.......................................................7-20
Drive Belts........................................................................\
.7-20
Fuel Filter ........................................................................\
..7-20
Fuel Lines, Fuel Hoses and Connections ..................7-20
Vapor Hose and Fuel Filler Cap ...................................7-20
Air Cleaner Filter .............................................................7-20
Spark Plugs .......................................................................7\
-20
Valve Clearance ...............................................................7-21
Cooling System ................................................................7-21
Engine Coolant .................................................................7-21 Automatic Transmission Fluid ......................................7-21
Ecoshift Dual Clutch Transmission Fluid ...................7-21
Brake hoses and Lines ..................................................7-22
Brake Fluid ........................................................................\
7-22
Parking Brake...................................................................7-22
Brake Discs, Pads, Calipers and Rotors .....................7-22
Exhaust Pipe and Muffler.............................................7-22
Suspension Mounting Bolts ..........................................7-22
Steering Gear Box, Linkage &
Boots/Lower Arm Ball Joint .........................................7-22
Drive Shafts and Boots .................................................7-22
Air Conditioning Refrigerant ........................................7-22
Engine Oil ..............................................................7-23
Checking the Engine Oil Level .....................................7-23
Checking the Engine Oil and Filter .............................7-25
Engine Coolant .....................................................7-26
Checking the Engine Coolant Level ............................7-26
Changing Engine Coolant ..............................................7-28
Brake Fluid ............................................................7-29
Checking the Brake Fluid Level ...................................7-29
Washer Fluid .........................................................7-30
Checking the Washer Fluid Level................................7-30
Parking Brake .......................................................7-30
Checking the Parking Brake .........................................7-30
7

7-8
Maintenance
Owner Maintenance Schedule
When you stop for fuel:
Check the engine oil level.
Check coolant level in the enginecoolant reservoir.
Check the windshield washer fluid level.
Check for low or under-inflated tires.
While operating your vehicle:
Note any changes in the sound ofthe exhaust or any smell of
exhaust fumes in the vehicle.
Check for vibrations in the steering wheel. Notice if there is any
increased steering effort or loose-
ness in the steering wheel, or
change in its straight-ahead posi-
tion.
Notice if your vehicle constantly turns slightly or "pulls" to one side
when traveling on smooth, level
road.
When stopping, listen and check for unusual sounds, pulling to one
side, increased brake pedal travel
or "hard-to-push" brake pedal.
If any slipping or changes in the operation of your transmission
occurs, check the transmission
fluid level.
Check the automatic transmission /ecoshift dual clutch transmission
P (Park) function.
Check the parking brake.
Check for fluid leaks under your vehicle (water dripping from the air
conditioning system during or after
use is normal).
At least monthly:
Check coolant level in the enginecoolant reservoir.
Check the operation of all exterior lights, including the stoplights, turn
signals and hazard warning flashers.
Check the inflation pressures of all tires including the spare for tires
that are worn, show uneven wear,
or are damaged.
Check for loose wheel lug nuts.
Be careful when checking your
engine coolant level when the
engine is hot. This may result in
coolant being blown out of the
opening and cause serious
burns and other injuries.
WARNING

7-9
7
Maintenance
At least twice a year:(i.e., every Spring and Fall)
Check radiator, heater and air condi-
tioning hoses for leaks or damage.
Check windshield washer spray and wiper operation. Clean wiper
blades with clean cloth dampened
with washer fluid.
Check headlamp alignment.
Check muffler, exhaust pipes, shields and clamps.
Check the seat belts for wear and function.
At least once a year:
Clean body and door drain holes.
Lubricate door hinges and hoodhinges.
Lubricate door and hood locks and latches.
Lubricate door rubber weather strips.
Check the air conditioning system.
Inspect and lubricate automatic transmission linkage and controls.
Clean the battery and terminals.
Check the brake fluid level. Follow Normal Maintenance Schedule
if the vehicle is usually operated where
none of the following conditions apply.
If any of the following conditions apply,
you must follow the Maintenance
Under Severe Usage Conditions.
Repeated short distance driving.
Driving in dusty conditions or
sandy areas.
Extensive use of brakes.
Driving in areas where salt or other corrosive materials are used.
Driving on rough or muddy roads.
Driving in mountainous areas.
Extended periods of idling or low speed operation.
Driving for a prolonged period in cold temperatures and/or extreme-
ly humid climates.
More than 50% driving in heavy city traffic during hot weather
above 90°F (32°C).
For additional information or assis-
tance see your authorized HYUNDAI
dealer.
S S C
C H
H E
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D U
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D
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IN
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EN
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S

Maintenance
7-10
I : Inspect : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
*
1: The drive belt should be replaced when cracks occur or tension is reduced excessively.
*2: If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from your authorized HYUNDAI dealer along with information on how to use them. Do not mix other additives.
*
3: Inspect for excessive valve noise and/or engine vibration and adjust if necessary. Have an authorized HYUNDAI dealer per- form the operation.
Normal Maintenance Schedule (Gamma 1.6 T-GDI/Theta 2.0 T-GDI)
Months1224364860728496108120132144156168180
Miles×1,00061218243036424854606672788490
Km×1,000102030405060708090100110120130140150
Drive belts *1At first, inspect at 60,000 miles or 72 months.
Thereafter, inspect every 12,000 miles or 24 months
Engine oil and engine oil filterRRRRRRRRRRRRRRR
Fuel additives *2Add fuel additives every 6,000 miles or 12 months
Air cleaner filterIIRIIRIIRIIRIIR
Spark plugsReplace every 42,000 miles
Valve clearance *3 (1.6 T-GDI only)Inspect every 60,000 miles or 72 months
Rotate tiresRotate tires every 6,000 miles
Climate control air filter RRRRRRRRRRRRRRR
Vacuum hoseIIIIIIIIIIIIIII
Engine coolantAt first, replace at 120,000 miles or 120 months.
Thereafter, replace every 30,000 miles or 24 months
MAINTENANCE INTERVALS
MAINTENANCE
ITEM

7
Maintenance
7-11
I : Inspect : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
Normal Maintenance Schedule (Gamma 1.6 T-GDI/Theta 2.0 T-GDI) (CONT)
Months1224364860728496108120132144156168180
Miles×1,00061218243036424854606672788490
Km×1,000102030405060708090100110120130140150
Battery conditionIIIIIIIIIIIIIII
Brake lines, hoses and connectionsIIIIIIIIIIIIIII
Disc brakes and padsIIIIIIIIIIIIIII
Driveshaft and bootsIIIIIIIIIIIIIII
Suspension mounting boltsIIIIIIIIIIIIIII
Air conditioner refrigerantIIIIIIIIIIIIIII
Air conditioner compressorIIIIIIIIIIIIIII
Exhaust pipe and mufflerIIIIIIIIIIIIIII
Automatic transaxle fluid (if equipped)No check, No service required
Ecoshift dual clutch transmission fluid
(if equipped)III
MAINTENANCEINTERVALS
MAINTENANCE
ITEM

Maintenance
7-12
I : Inspect : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
*
4: Fuel filter & Fuel tank air filter are considered to be maintenance free\
but periodic inspection is recommended for this mainte-nance schedule depends on fuel quality. If there are some important safety matters like fuel flow restriction, surging, loss of
power, hard starting problem, etc. replace the fuel filter immediately regardless of maintenance schedule a\
nd consult an
authorized HYUNDAI dealer for details.
Normal Maintenance Schedule (Gamma 1.6 T-GDI/Theta 2.0 T-GDI) (CONT)
Months1224364860728496108120132144156168180
Miles×1,00061218243036424854606672788490
Km×1,000102030405060708090100110120130140150
Intercooler, in/out hose, air intake hoseIIIIIIIIIIIIIII
Steering gear rack, linkage and bootsIIIIIIIIIIIIIII
Vapor hose, fuel filler cap and fuel tankIIIIIII
Fuel tank air filter *4IIIIIII
Fuel filter *4IIIIIII
Fuel lines, hoses and connectionsIII
Parking brakeIIIIIII
Brake fluidIIIIIII
MAINTENANCE INTERVALS
MAINTENANCE
ITEM

7
Maintenance
7-13
Maintenance Under Severe Usage Conditions (Gamma 1.6 T-GDI/Theta 2.0 T-GDI)
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer
to the chart below for the appropriate maintenance intervals.
R : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if neces\
sary
MAINTENANCE ITEMMAINTENANCE OPERATIONMAINTENANCE INTERVALSDRIVING
CONDITION
Engine oil and filterREvery 3,000 miles or 6 monthsA, B, C, D, E, F, G, H, I, J, K
Air cleaner filterRMore frequentlyC, E
Spark plugsRMore frequentlyA, B, H, I, K
Automatic transmission fluid
(if equipped)REvery 60,000 milesA, C, E, F, G, I
Ecoshift dual clutch transmission fluid
(if equipped)REvery 72,000 milesC, D, E, F, G, H, I, J
Front brake disc/pads, calipersIMore frequentlyC, D, G, H
Rear brake shoes or disc/padsIMore frequentlyC, D, G, F

Maintenance
7-14
Severe Driving Conditions
A - Repeatedly driving short distances of less than 5 miles (8 km) in normal temperature or less than 10 miles (16 km)
in freezing temperature
B - Extensive engine idling or low speed driving for long dis- tances
C - Driving on rough, dusty, muddy, unpaved, graveled or salt- spread roads
D - Driving in areas using salt or other corrosive materials or in very cold weather E - Driving in sandy areas
F - Driving in heavy traffic area over 90°F (32°C)
G- Driving on uphill, downhill, or mountain road
H - Towing a Trailer, or using a camper, or roof rack
I - Driving as a patrol car, taxi, other commercial use or vehicle
towing
J - Driving over 106 mph (170 km/h)
K - Frequently driving in stop-and-go conditions
MAINTENANCE ITEMMAINTENANCE OPERATIONMAINTENANCE INTERVALSDRIVING
CONDITION
Parking brakeIMore frequentlyC, D, G, H
Steering gear box, linkage & boots/
lower arm ball joint, upper arm ball
joint
IMore frequentlyC, D, E, F, G, H, I
Suspension mounting boltsIMore frequentlyC, D, E, F, G, H, I
Drive shafts and bootsIEvery 3,000 miles or 6 monthsC, D, E, F, G, H, I
Climate control air filter
(for evaporator and blower unit)RMore frequentlyC, E