2015 Hyundai Sonata spark plugs replace

F19
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 ....................................7-10
Maintenance Under Severe Usage Conditions ........7-20
Explanation of Scheduled Maintenance Items ..7-21
Engine Oil and Filter.......................................................7-21
Drive Belts........................................................................\
.7-21
Fuel Filter ........................................................................\
..7-21
Fuel Lines, Fuel Hoses and Connections ..................7-21
Vapor Hose and Fuel Filler Cap ...................................7-21
Air Cleaner Filter .............................................................7-21
Spark Plugs .......................................................................7\
-21
Valve Clearance ...............................................................7-22
Cooling System ................................................................7-22
Engine Coolant .................................................................7-22
Automatic Transmission Fluid ......................................7-22
Dual Clutch Transmission Fluid ....................................7-22Brake hoses and Lines ..................................................7-23
Brake Fluid ........................................................................\
7-23
Parking Brake...................................................................7-23
Brake Discs, Pads, Calipers and Rotors .....................7-23
Exhaust Pipe and Muffler.............................................7-23
Suspension Mounting Bolts ..........................................7-23
Steering Gear Box, Linkage &
Boots/Lower Arm Ball Joint .........................................7-23
Drive Shafts and Boots .................................................7-23
Air Conditioning Refrigerant ........................................7-23
Engine Oil ..............................................................7-24
Checking the Engine Oil Level .....................................7-24
Checking the Engine Oil and Filter .............................7-26
Engine Coolant .....................................................7-27
Checking the Engine Coolant Level ............................7-27
Changing Engine Coolant ..............................................7-29
Brake Fluid ............................................................7-30
Checking the Brake Fluid Level ...................................7-30
Washer Fluid .........................................................7-31
Checking the Washer Fluid Level................................7-31
Parking Brake .......................................................7-31
Checking the Parking Brake .........................................7-31
Air Cleaner ............................................................7-32
Filter Replacement ..........................................................7-32
F19
7Maintenance

5-90
Driving your vehicle
Check spark plugs and ignitionsystem
Inspect your spark plugs as
described in chapter 7 and replace
them if necessary. Also check all
ignition wiring and components to be
sure they are not cracked, worn or
damaged in any way.
Use approved window washeranti-freeze in system
To keep the water in the window
washer system from freezing, add an
approved window washer anti-freeze
solution in accordance with instruc-
tions on the container. Window wash-
er anti-freeze is available from an
authorized HYUNDAI dealer and
most auto parts outlets. Do not use
engine coolant or other types of anti-
freeze as these may damage the
paint finish.
Do not let your parking brakefreeze
Under some conditions your parking
brake can freeze in the engaged
position. This is most likely to happen
when there is an accumulation of
snow or ice around or near the rear
brakes or if the brakes are wet. If
there is a risk the parking brake may
freeze, apply it only temporarily while
you put the gear selector lever in P
and block the rear wheels so the car
cannot roll. Then release the parking
brake.
Do not let ice and snow accu-mulate underneath
Under some conditions, snow and
ice can build up under the fenders
and interfere with the steering. When
driving in severe winter conditions
where this may happen, you should
periodically check underneath the
car to be sure the movement of the
front wheels and the steering com-
ponents is not obstructed.
Don't place foreign objects ormaterials in the engine com-partment
Placement of foreign object or mate-
rials which prevent cooling of the
engine, in the engine compartment,
may cause a failure or combustion.
The manufacturer is not responsible
for the damage caused by such
placement.
To keep locks from freezing
To keep the locks from freezing,
squirt an approved de-icer fluid or
glycerine into the key opening. If a
lock is covered with ice, squirt it with
an approved de-icing fluid to remove
the ice. If the lock is frozen internally,
you may be able to thaw it out by
using a heated key. Handle the heat-
ed key with care to avoid injury.

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 ....................................7-10
Maintenance Under Severe Usage Conditions ........7-20
Explanation of Scheduled Maintenance Items ..7-21
Engine Oil and Filter.......................................................7-21
Drive Belts........................................................................\
.7-21
Fuel Filter ........................................................................\
..7-21
Fuel Lines, Fuel Hoses and Connections ..................7-21
Vapor Hose and Fuel Filler Cap ...................................7-21
Air Cleaner Filter .............................................................7-21
Spark Plugs .......................................................................7\
-21
Valve Clearance ...............................................................7-22
Cooling System ................................................................7-22
Engine Coolant .................................................................7-22
Automatic Transmission Fluid ......................................7-22
Dual Clutch Transmission Fluid ....................................7-22
Brake hoses and Lines ..................................................7-23
Brake Fluid ........................................................................\
7-23
Parking Brake...................................................................7-23Brake Discs, Pads, Calipers and Rotors .....................7-23
Exhaust Pipe and Muffler.............................................7-23
Suspension Mounting Bolts ..........................................7-23
Steering Gear Box, Linkage &
Boots/Lower Arm Ball Joint .........................................7-23
Drive Shafts and Boots .................................................7-23
Air Conditioning Refrigerant ........................................7-23
Engine Oil ..............................................................7-24
Checking the Engine Oil Level .....................................7-24
Checking the Engine Oil and Filter .............................7-26
Engine Coolant .....................................................7-27
Checking the Engine Coolant Level ............................7-27
Changing Engine Coolant ..............................................7-29
Brake Fluid ............................................................7-30
Checking the Brake Fluid Level ...................................7-30
Washer Fluid .........................................................7-31
Checking the Washer Fluid Level................................7-31
Parking Brake .......................................................7-31
Checking the Parking Brake .........................................7-31
Air Cleaner ............................................................7-32
Filter Replacement ..........................................................7-32
Climate Control Air Filter ....................................7-34
Filter Inspection ...............................................................7-34
7

Maintenance
7-12
45,000 miles (72,000 km) or 36 months
❑Inspect air cleaner filter
❑Inspect vacuum hose
❑Inspect air conditioning refrigerant
❑Inspect brake hoses and lines
❑Inspect drive shafts and boots
❑Inspect exhaust pipe and muffler
❑Inspect front brake disc/pads, calipers
❑Inspect rear brake disc/pads
❑Inspect steering gear box, linkage & boots/lower arm ball joint,
upper arm ball joint
❑ Inspect suspension mounting bolts
❑Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑ Replace climate control air filter (for evaporator and blower unit)
❑Replace engine oil and filter (2.4 GDI) *3
(45,000 miles (72,000 km) or 72 months)
❑Replace spark plugs (iridium coated), (1.6TGDI/2.0TGDI)
❑ Add fuel additive *4 (45,000 miles (72,000 km) or 72 months)
Normal Maintenance Schedule (CONT.)
52,500 miles (84,000 km) or 42 months
❑Inspect air cleaner filter
❑Inspect vacuum hose
❑Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑Replace engine oil and filter (2.4 GDI) *3
(52,500 miles (84,000 km) or 84 months)
❑ Add fuel additive *4 (52,500 miles (84,000 km) or 84 months)
*3Engine oil (1.6 TGDI/2.0 TGDI) At first, replace at 3,000 miles (5,000 km) or
6 months, after that, every 5,000 miles (8,000 km) or 6 months.
*
4If TOP TIER Detergent Gasoline is not available, one bottle of additive is rec-
ommended. Additives are available from your authorized HYUNDAI dealer
along with information on how to use them. Do not mix other additives.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or replace.

7
Maintenance
7-15
Normal Maintenance Schedule (CONT.)
97,500 miles (156,000 km) or 78 months
❑Inspect air cleaner filter
❑Inspect vacuum hose
❑Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑Replace engine oil and filter (2.4 GDI) *3
(97,500 miles (156,000 km) or 156 months)
❑ Add fuel additive *4 (97,500 miles (156,000 km) or 156 months)
90,000 miles (144,000 km) or 72 months
❑Inspect vacuum hose
❑Inspect air conditioning refrigerant
❑Inspect brake hoses and lines
❑Inspect drive shafts and boots
❑Inspect exhaust pipe and muffler
❑Inspect front brake disc/pads, calipers
❑Inspect rear brake disc/pads
❑Inspect steering gear box, linkage & boots/lower arm ball joint,
upper arm ball joint
❑ Inspect suspension mounting bolts
❑Inspect brake fluid
❑Inspect fuel filter *1
❑Inspect fuel cap, fuel lines, fuel hoses and connections
❑Inspect fuel tank air filter (if equipped) *1
❑Inspect parking brake
❑Inspect vapor hose and fuel filler cap
❑Inspect drive belts (First, 60,000 miles (96,000 km) or 72 months
after every 15,000 miles (24,000 km) or 24 months)
❑ Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑ Replace climate control air filter (for evaporator and blower unit)
❑Replace air cleaner filter
❑Replace engine oil and filter (2.4 GDI) *3
(90,000 miles (144,000 km) or 144 months)
❑Replace spark plugs (iridium coated), (1.6TGDI/2.0TGDI)
(Continued)
*1Fuel filter & Fuel tank air filter are considered to be maintenance free\
but peri-
odic inspection is recommended for this maintenance schedule depends on
fuel quality. If there are some important safety matters like fuel flow restric-
tion, surging, loss of power, hard starting problem etc, replace the fuel filter
immediately regardless of maintenance schedule and consult an authorized
HYUNDAI dealer for details.
*
3Engine oil (1.6 TGDI/2.0 TGDI) At first, replace at 3,000 miles (5,000 km) or
6 months, after that, every 5,000 miles (8,000 km) or 6 months.
*
4If TOP TIER Detergent Gasoline is not available, one bottle of additive is rec-
ommended. Additives are available from your authorized HYUNDAI dealer
along with information on how to use them. Do not mix other additives.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or replace.
(Continued)
❑Replace coolant (First, 60,000 miles (96,000 km) or 60 months
after every 30,000 miles (48,000 km) or 24 months)
❑ Add fuel additive *4 (90,000 miles (144,000 km) or 144 months)

Maintenance
7-16
Normal Maintenance Schedule (CONT.)
105,000 miles (168,000 km) or 84 months
❑Inspect air cleaner filter
❑Inspect vacuum hose
❑Inspect air conditioning refrigerant
❑Inspect brake hoses and lines
❑Inspect drive shafts and boots
❑Inspect exhaust pipe and muffler
❑Inspect front brake disc/pads, calipers
❑Inspect rear brake disc/pads
❑Inspect steering gear box, linkage & boots/lower arm ball joint,
upper arm ball joint
❑ Inspect suspension mounting bolts
❑Inspect drive belts
(First, 60,000 miles (96,000 km) or 72 months
after every 15,000 miles (24,000 km) or 24 months)
❑ Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑ Replace climate control air filter (for evaporator and blower unit)
❑Replace spark plugs (iridium coated) (2.4 GDI)
❑Replace engine oil and filter (2.4 GDI) *3
(105,000 miles (168,000 km) or 168 months)
❑ Add fuel additive *4 (105,000 miles (168,000 km) or 168 months
112,500 miles (180,000 km) or 90 months
❑Inspect air cleaner filter
❑Inspect vacuum hose
❑Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑Inspect dual clutch transmission fluid (if equipped)
❑Replace engine oil and filter (2.4 GDI) *3
(112,500 miles (180,000 km) or 180 months)
❑ Add fuel additive *4 (112,500 miles (180,000 km) or 180 months
*3Engine oil (1.6 TGDI/2.0 TGDI) At first, replace at 3,000 miles (5,000 km) or
6 months, after that, every 5,000 miles (8,000 km) or 6 months.
*
4If TOP TIER Detergent Gasoline is not available, one bottle of additive is rec-
ommended. Additives are available from your authorized HYUNDAI dealer
along with information on how to use them. Do not mix other additives.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or replace.

Maintenance
7-18
Normal Maintenance Schedule (CONT.)
135,000 miles (216,000 km) or 108 months
❑Inspect air cleaner filter
❑Inspect vacuum hose
❑Inspect air conditioning refrigerant
❑Inspect brake hoses and lines
❑Inspect drive shafts and boots
❑Inspect exhaust pipe and muffler
❑Inspect front brake disc/pads, calipers
❑Inspect rear brake disc/pads
❑Inspect steering gear box, linkage & boots/lower arm ball joint,
upper arm ball joint
❑ Inspect suspension mounting bolts
❑Inspect drive belts
(First, 60,000 miles (96,000 km) or 72 months
after every 15,000 miles (24,000 km) or 24 months)
❑ Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑ Replace climate control air filter (for evaporator and blower unit)
❑Replace engine oil and filter (2.4 GDI) *3
(135,000 miles (216,000 km) or 216 months)
❑Replace spark plugs (iridium coated), (1.6TGDI/2.0TGDI)
❑ Add fuel additive *4 (135,000 miles (216,000 km) or 216 months)
142,500 miles (228,000 km) or 114 months
❑Inspect air cleaner filter
❑Inspect vacuum hose
❑Inspect intercooler, in/out hose, air intake hose
- Turbo GDI (Every 6,200miles (10,000km))
❑Replace engine oil and filter (2.4 GDI) *3
(142,500 miles (228,000 km) or 228 months)
❑ Add fuel additive *4 (142,500 miles (228,000 km) or 228 months)
*3Engine oil (1.6 TGDI/2.0 TGDI) At first, replace at 3,000 miles (5,000 km) or
6 months, after that, every 5,000 miles (8,000 km) or 6 months.
*
4If TOP TIER Detergent Gasoline is not available, one bottle of additive is rec-
ommended. Additives are available from your authorized HYUNDAI dealer
along with information on how to use them. Do not mix other additives.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or replace.

Maintenance
7-20
Maintenance Under Severe Usage Conditions
Severe Driving Conditions
A - Repeatedly driving short distance of less than 5 miles (8 km) in normaltemperature or less than 10 miles (16 km) in freezing temperature
B - Extensive engine idling or low speed driving for long distances
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
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 filter (2.4 GDI)REvery 3,750 miles (6,000 km) or 6 monthsA, B, C, D, E, F, G, H, I, K
Engine oil and filter (1.6 TGDI/2.0 TGDI)REvery 3,000 miles (5,000 km) or 6 monthsA, B, C, D, E, F, G, H, I, J, K
Air cleaner filterRMore frequentlyC, E
Spark plugsRMore frequentlyB, H
Automatic transmission fluidREvery 60,000 miles (96,000 km)A, C, E, F, G, I
Dual clutch transmission fluid REvery 75,000 miles (120,000 km)A, C, E, F, G, H, I, J
Front brake disc/pads, calipersIMore frequentlyC, D, G, H
Rear brake disc/padsIMore frequentlyC, D, G, F
Parking brakeIMore frequentlyC, D, G, H
Steering gear box, linkage & boots/lower arm ball joint,
upper arm ball jointIMore frequentlyC, D, E, F, G, H, I
Drive shafts and bootsIEvery 7,500 miles (12,000 km) or 6 monthsC, D, E, F, G, H, I, J
Climate control air filter (for evaporator and blower unit)RMore frequentlyC, E