Hyundai Sonata (2018 year). Manual — part 26

Recommended engine coolant

WARNING

•

When adding coolant, use only

deionized water, distilled water or

The electric motor for

soft water for your vehicle and

the cooling fan may

never mix hard water in the coolant

continue to operate

filled at the factory.

or start up when the

engine is not running

•

An improper coolant mixture can

and can cause serious injury.

result in severe malfunction or

Keep hands, clothing and tools

engine damage.

away from the rotating fan

•

The engine in your vehicle has alu-

blades of the cooling fan.

minum engine parts and must be

OLF074006N

protected by an ethylene-glycol

Check the condition and connections

with phosphate based coolant to

The electric motor for the cooling fan

of all cooling system hoses and

prevent corrosion and freezing.

is controlled by engine coolant tem-

heater hoses. Replace any swollen

•

Do not use alcohol or methanol

perature, refrigerant pressure and

or deteriorated hoses.

coolant or mix them with the spec-

vehicle speed. As the engine coolant

The coolant level should be filled

ified coolant.

temperature decreases, the electric

between the F and the L marks on

•

Do not use a solution that contains

motor will automatically shut off. This

the side of the coolant reservoir

more than 60% antifreeze or less

is a normal condition. If your vehicle

when the engine is cool.

than 35% antifreeze, which would

is equipped with GDI, the electric

If the coolant level is low, add enough

reduce the effectiveness of the

motor for the cooling fan may begin

distilled

(deionized) water to bring

solution.

to operate at any time and continue

the level to the F mark, but do not

to operate until you disconnect the

overfill. If frequent additions are

negative battery cable.

required, we recommend that you

see an authorized HYUNDAI dealer

for a cooling system inspection.

7-27

Maintenance

For mixing percentage, refer to the

Changing Engine Coolant

NOTICE

following table:

Have coolant changed by an author-

To prevent damage to engine

Mixture Percentage

ized HYUNDAI dealer according to

parts, put a thick towel around the

Ambient

(volume)

the Maintenance Schedule at the

radiator cap before refilling the

Temperature

beginning of this chapter.

Antifreeze

Water

coolant to prevent the coolant

5°F (-15°C)

from overflowing into engine

-13°F (-25°C)

WARNING

parts, such as the generator.

-31°F (-35°C)

Do not use engine coolant or

-49°F (-45°C)

antifreeze in the washer fluid

reservoir.

Engine coolant can severely

Information

obscure visibility when sprayed

If in doubt about the mix ratio, a 50%

on the windshield and may

water and 50% antifreeze mix is the

cause loss of vehicle control

easiest to mix together as it will be the

resulting in an accident.

same quantity of each. It is suitable to

Engine coolant may also cause

use for most temperature ranges of -

damage to paint and body trim.

31°F and higher.

7-28

BRAKE FLUID

Checking the Brake Fluid Level

If the level is low, add the specified

NOTICE

brake fluid to the MAX level. The level

will fall with accumulated mileage.

• Do not allow brake fluid to con-

This is a normal condition associated

tact the vehicle’s body paint, as

with the wear of the brake linings. If

paint damage will result.

the fluid level is excessively low, have

• Brake fluid, which has been

the brake system checked by an

exposed to open air for an

authorized HYUNDAI dealer.

extended time should NEVER be

used as its quality cannot be

guaranteed. It should be dis-

WARNING

posed of properly.

If the brake system requires fre-

• Do not use the wrong kind of

brake fluid. A few drops of miner-

quent additions of fluid this

OLF074008N

could indicate a leak in the

al based oil, such as engine oil, in

Check the fluid level in the reservoir

your brake system can damage

brake system. Have the vehicle

periodically. The fluid level should be

inspected by an authorized

brake system parts.

between MAX and MIN marks on the

HYUNDAI dealer.

side of the reservoir.

Information

Before removing the reservoir cap

Use only the specified brake fluid

and adding brake fluid, clean the

WARNING

(refer to "Recommended Lubricants

area around the reservoir cap thor-

and Capacities" in chapter 8).

oughly to prevent brake fluid contam-

Do not allow brake fluid to come

ination.

in contact with your eyes. If

brake fluid comes in contact

with your eyes, flush your eyes

with clean water for at least 15

minutes and get immediate

medical attention.

7-29

Maintenance

WASHER FLUID

PARKING BRAKE

Checking the Washer Fluid

Checking the Parking Brake

WARNING

Level

Foot type

To prevent serious injury or

death, take the following safety

precautions when using washer

fluid:

•

Do not use engine coolant or

antifreeze in the washer fluid

reservoir.

Engine coolant can severely

obscure visibility

when

sprayed on the windshield and

may cause loss of vehicle con-

OLF074009N

trol resulting in an accident or

ODH053142

damage to paint and body trim.

Check the fluid level in the washer

Check whether the stroke is within

fluid reservoir and add fluid if neces-

•

Do not allow sparks or flame to

specification when the parking brake

sary. Plain water may be used if

contact the washer fluid or the

pedal is depressed with 44 lb (20 kg,

washer fluid is not available.

washer fluid reservoir. Washer

196 N) of force. Also, the parking

However, use washer solvent with

fluid may contain alcohol and

brake alone should securely hold the

antifreeze characteristics in cold cli-

can be flammable.

vehicle on a fairly steep grade. If the

mates to prevent freezing.

•

Do not drink washer fluid and

stroke is more or less than specified,

avoid contact with skin.

have the parking brake adjusted by

Washer fluid is poisonous to

an authorized HYUNDAI dealer.

humans and animals.

Stroke : 3 notch

•

Keep washer fluid away from

children and animals.

7-30

AIR CLEANER

Filter Replacement

OLF074011

OLF074012

1. Remove the air cleaner filter cover.

3. Pull down the lever to the

OLF074010

UNLOCK position.

2. Wipe the inside of the air cleaner.

The air cleaner filter can be cleaned

for inspection using compressed air.

Do not attempt to wash or to rinse it,

as water will damage the filter.

If soiled, the air cleaner filter must be

replaced.

7-31

Maintenance

Information

If the vehicle is operated in extremely

dusty or sandy areas, replace the ele-

ment more often than the usual rec-

ommended intervals

(refer to

"Maintenance Under Severe Usage

Conditions" in this chapter).

NOTICE

• Do not drive with the air cleaner

OLF074013

OLF074101K

filter removed. This will result in

4. Replace the air cleaner filter.

5. Pull up the lever (1) to the LOCK

excessive engine wear.

position.

• When removing the air cleaner

6. Install the cover and make sure

filter, be careful that dust or dirt

the inner hooks (2) to be inserted

does not enter the air intake, or

to holes (3).

damage may result.

7. Check if the cover is firmly

• Use HYUNDAI genuine parts,

installed.

use of non-genuine parts could

damage the air flow sensor.

7-32

CLIMATE CONTROL AIR FILTER

Filter Inspection

The climate control air filter should

be replaced according to the

Maintenance Schedule. If the vehicle

is operated in severely air-polluted

cities or on dusty rough roads for a

long period, it should be inspected

more frequently and replaced earlier.

When you replace the climate control

air filter, replace it performing the fol-

lowing procedure, and be careful to

avoid damaging other components.

OLF074015

OLF074014

1. With the glove box open, remove

2. Remove the support rod (1).

the stoppers on both sides to allow

the glove box to hang freely on the

hinges.

7-33

Maintenance

NOTICE

Install a new climate control air fil-

ter in the correct direction with the

arrow symbol (↓) facing down-

wards. Otherwise, the climate con-

trol effects may decrease, possi-

bly with a noise.

OLF074016

OLF074107K

3. Remove the climate control air fil-

4. Replace the climate control air fil-

ter case by pulling out the right

ter.

side of the cover.

5. Reassemble in the reverse order

of disassembly.

7-34

WIPER BLADES

Blade Inspection

NOTICE

Blade Replacement

Contamination of either the wind-

When the wipers no longer clean

To prevent damage to the wiper

shield or the wiper blades with for-

adequately, the blades may be worn

blades, arms or other compo-

eign matter can reduce the effective-

or cracked, and require replacement.

nents, do not:

ness of the windshield wipers.

• Use gasoline, kerosene, paint

Common sources of contamination

thinner, or other solvents on or

NOTICE

are insects, tree sap, and hot wax

near them.

treatments used by some commer-

To prevent damage to the wiper

cial car washes. If the blades are not

• Attempt to move the wipers

arms or other components, do not

wiping properly, clean both the win-

manually.

attempt to move the wipers manu-

dow and the blades with a clean

• Use non-specified wiper blades.

ally.

cloth dampened with washer fluid or

clean water.

NOTICE

Information

Commercial hot waxes applied by

The use of a non-specified wiper

automatic car washes have been

blade could result in wiper mal-

known to make the windshield diffi-

function and failure.

cult to clean.

7-35

Maintenance

OLF074017

OLF074018

OLF074019

1. Raise the wiper arm.

2. Lift the wiper blade clip. Then push

3. Install the new blade assembly in

down the blade body.

the reverse order of removal.

NOTICE

4. Return the wiper arm on the wind-

shield.

Do not allow the wiper arm to fall

against the windshield, since it

may chip or crack the windshield.

7-36

BATTERY

WARNING

(Continued)

Batteries contain sulfu-

•

NEVER attempt to recharge

To prevent SERIOUS INJURY or

ric acid which is highly

the battery when the vehicle’s

DEATH to you or bystanders,

corrosive. Do not allow

battery cables are connected

always follow these precautions

acid to contact your

to the battery.

when working near or handling

eyes, skin or clothing.

•

The electrical ignition system

the battery:

If acid gets into your eyes, flush

works with high voltage.

Always read and follow

your eyes with clean water for at

NEVER touch these compo-

instructions carefully

least 15 minutes and get imme-

nents with the engine running

when handling a battery.

diate medical attention. If acid

or when the ignition is in the

Wear eye protection

gets on your skin, thoroughly

ON position.

designed to protect the

wash the area. If you feel pain or

eyes from acid splashes.

a burning sensation, get med-

ical attention immediately.

Keep all flames, sparks,

or smoking materials

• When lifting a plastic-cased

away from the battery.

battery, excessive pressure

on the case may cause battery

Hydrogen is always pres-

acid to leak. Lift with a battery

ent in battery cells, is

carrier or with your hands on

highly combustible, and

opposite corners.

may explode if ignited.

• Do not attempt to jump start

Keep batteries out of

your vehicle if your battery is

reach of children.

frozen.

(Continued)

7-37

Maintenance

For Best Battery Service

Battery Recharging

WARNING

CALIFORNIA PROPOSITION 65

WARNING

Always follow these instructions

Battery posts, terminals, and

when recharging your vehicle’s

related accessories contain

battery to avoid the risk of SERI-

lead and lead compounds,

OUS INJURY or DEATH from

chemicals known to the State of

explosions or acid burns:

California to cause cancer, birth

•

Before performing mainte-

defects and reproductive harm.

nance or recharging the bat-

Batteries also contain other

tery, turn off all accessories and

chemicals known to the State of

place the ignition switch to the

OLF074020

California to cause cancer.

LOCK/OFF position.

Wash hands after handling.

•

Keep the battery securely mounted.

•

Keep all flames, sparks, or

•

Keep the battery top clean and dry.

smoking materials away from

NOTICE

•

Keep the terminals and connec-

the battery.

tions clean, tight, and coated with

•

Always work outdoors or in a

• When you do not use the vehicle

petroleum jelly or terminal grease.

well ventilated area.

for a long time in a low tempera-

ture area, disconnect the battery

•

Rinse any spilled acid from the bat-

•

Wear eye protection when

tery immediately with a solution of

checking the battery during

and keep it indoors.

water and baking soda.

charging.

• Always charge the battery fully

to prevent battery case damage

•

The battery must be removed

in low temperature areas.

from the vehicle and placed in

a well ventilated area.

(Continued)

7-38

By jump starting

Reset features

(Continued)

After a jump start from a good bat-

Some items need to be reset after

•

Watch the battery during

tery, idle the vehicle with the head-

the battery has been discharged or

charging, and stop or reduce

lights turned ON for 20-30 minutes

the battery has been disconnected.

the charging rate if the battery

before started driving. The vehicle

See chapter 3 for:

cells begin boiling violently.

may not run properly if you drive it off

•

Power Windows

•

The negative battery cable

before the battery had a chance to

must be removed first and

•

Trip Computer

adequately recharge. See "Jump

installed last when the battery

Starting" in chapter 6 for more infor-

•

Climate Control System

is disconnected. Disconnect

mation on jump starting procedures.

•

Clock

the battery charger in the fol-

•

Audio System

lowing order:

Information

•

Sunroof

(1) Turn off the battery charger

main switch.

An inappropriately disposed

battery can be harmful to

(2) Unhook the negative

the environment and human

clamp from the negative

health.

battery terminal.

Dispose the battery according to your

(3) Unhook the positive clamp

local law(s) or regulation.

from the positive battery

terminal.

•

Always use a genuine HYUNDAI

approved battery when you

replace the battery.

7-39

Maintenance

TIRES AND WHEELS

Tire Care

WARNING

(Continued)

For proper maintenance, safety, and

•

Replace tires that are worn,

maximum fuel economy, you must

Tire failure may cause loss of

show uneven wear, or are dam-

vehicle control resulting in an

aged. Worn tires can cause

always maintain recommended tire

inflation pressures and stay within the

accident. To reduce risk of

loss of braking effectiveness,

SERIOUS INJURY or DEATH,

steering) control, or traction.

load limits and weight distribution rec-

ommended for your vehicle.

take the following precautions:

•

ALWAYS replace tires with the

•

Inspect your tires monthly for

same size as each tire that

proper inflation as well as

was originally supplied with

wear and damage.

this vehicle. Using tires and

•

The recommended cold tire

wheels other than the recom-

pressure for your vehicle can

mended sizes could cause

be found in this manual and on

unusual handling characteris-

the tire label located on the dri-

tics, poor vehicle control, or

ver’s side center pillar. Always

negatively affect your vehi-

use a tire pressure gauge to

cle’s Anti-Lock Brake System

measure tire pressure. Tires

(ABS) resulting in a serious

with too much or too little

accident.

pressure wear unevenly caus-

ing poor handling.

•

Check the pressure of the

spare every time you check

the pressure of the other tires

on your vehicle.

(Continued)

7-40

Recommended Cold Tire

WARNING

Inflation Pressures

All tire pressures

(including the

Recommended pressures must

spare) should be checked when the

be maintained for the best ride,

tires are cold. "Cold tires" means the

vehicle handling, and minimum

vehicle has not been driven for at

tire wear.

least three hours or driven less than

Over-inflation or under-inflation

one mile (1.6 km).

can reduce tire life, adversely

Warm tires normally exceed recom-

affect vehicle handling, and

mended cold tire pressures by 4 to 6

lead to sudden tire failure that

psi (28 to 41 kPa). Do not release air

could result in loss of vehicle

OLF084007N

from warm tires to adjust the pres-

control resulting in an accident.

All specifications

(sizes and pres-

sure or the tires will be under-inflat-

Severe under-inflation can lead

sures) can be found on a label

ed. For recommended inflation pres-

to severe heat build-up, causing

attached to the driver’s side center

sure, refer to "Tire and Wheels" in

blowouts, tread separation and

pillar.

chapter 8.

other tire failures that can result

in the loss of vehicle control

resulting in an accident. This

risk is much higher on hot days

and when driving for long peri-

ods at high speeds.

7-41

Maintenance

Check Tire Inflation Pressure

If you overfill the tire, release air by

CAUTION

pushing on the metal stem in the

Check your tires, including the spare

center of the tire valve. Recheck the

tire, once a month or more.

•

Under-inflation results in

tire pressure with the tire gauge. Be

excessive wear, poor handling

sure to put the valve caps back on

and reduced fuel economy.

How to check

the valve stems. Without the valve

Wheel deformation is also

cap, dirt or moisture could get into

Use a good quality tire pressure

possible. Keep your tire pres-

the valve core and cause air leakage.

gauge to check tire pressure. You

sures at the proper levels. If a

If a valve cap is missing, install a new

can not tell if your tires are properly

tire frequently needs refilling,

one as soon as possible.

inflated simply by looking at them.

have it checked by an author-

Radial tires may look properly inflat-

ized HYUNDAI dealer.

ed when they are under-inflated.

•

Over-inflation produces a

Remove the valve cap from the tire

harsh ride, excessive wear at

valve stem. Press the tire gauge firm-

the center of the tire tread,

ly onto the valve to get a pressure

and a greater possibility of

measurement. If the cold tire inflation

damage from road hazards.

pressure matches the recommended

pressure on the tire and loading

information label, no further adjust-

ment is necessary. If the pressure is

low, add air until you reach the rec-

ommended pressure. Make sure to

put the valve caps back on the valve

stems. Without the valve cap, dirt or

moisture could get into the valve

core and cause air leakage. If a valve

cap is missing, install a new one as

soon as possible.

7-42

Tire Rotation

■ Without a spare tire

Information

To equalize tread wear, HYUNDAI

The outside and inside of the unsym-

recommends that the tires be rotated

metrical tire is distinguishable. When

every 7,500 miles

(12,000 km) or

installing an unsymmetrical tire, be

sooner if irregular wear develops.

sure to install the side marked "out-

During rotation, check the tires for

side" face the outside. If the side

correct balance.

marked "inside" is installed on the

outside, it will have a bad effect on

When rotating tires, check for uneven

wear and damage. Abnormal wear is

vehicle performance.

usually caused by incorrect tire pres-

sure, improper wheel alignment, out-

ODH073802

WARNING

of-balance wheels, severe braking or

Disc brake pads should be inspected

severe cornering. Look for bumps or

for wear whenever tires are rotated.

• Do not use the compact spare

bulges in the tread or side of tire.

tire for tire rotation.

Replace the tire if you find either of

• Do not mix bias ply and radial

these conditions. Replace the tire if

ply tires under any circum-

fabric or cord is visible. After rotation,

stances. This may cause

be sure to bring the front and rear tire

unusual handling characteris-

pressures to specification and check

tics that may cause loss of

lug nut tightness (proper torque is

vehicle control resulting in an

79-94 lb.ft [11-13 kg.m]).

accident.

7-43

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Hyundai Sonata (2018 year). Manual — part 26

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