KIA Optima (2018 year). Instruction — part 27

Maintenance

30

8

For mixture percentage, refer to the
following table.

Changing the coolant

Have the coolant changed by an
authorized Kia dealer according to
the Maintenance Schedule at the
beginning of this chapter.
Put a thick cloth around the radiator
cap before refilling the coolant in
order to prevent the coolant from
overflowing into engine parts such as
the alternator.

OJF075007

Ambient

Temperature

Mixture Percentage

(volume)

Antifreeze

Water

5°F (-15°C)

35

65

-13°F (-25°C)

40

60

-31°F (-35°C)

50

50

-49°F (-45°C)

60

40

WARNING

Radiator cap

Do not remove the radiator cap
when the engine and radiator
are hot. Scalding hot coolant
and steam may blow out under
pressure which may result in
serious injury.

CAUTION

Put a thick cloth or fabric
around the radiator cap before
refilling the coolant in order to
prevent the coolant from over-
flowing into engine parts such
as the generator.

8 31

Maintenance

BRAKE FLUID

Checking the brake fluid level

Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX (Maximum) and MIN
(Minimum) marks on the side of the
reservoir.
Before removing the reservoir cap
and adding brake fluid, clean the
area around the reservoir cap thor-
oughly to prevent brake fluid contam-
ination.

If the level is low, add fluid to the
MAX (Maximum) level. The level will
fall with accumulated mileage. This is
a normal condition associated with
the wear of brake linings. If the fluid
level is excessively low, have the
brake system checked by an author-
ized Kia dealer.

Use only the specified brake fluid.
(Refer to “Recommended lubricants
and capacities” in chapter 9.)

Never mix different types of fluid.

In the event the brake system
requires frequent additions of fluid,
the vehicle should be inspected by
an authorized Kia dealer.
When changing and adding brake
fluid, handle it carefully. Do not let it
come in contact with your eyes. If
brake fluid should come in contact
with your eyes, immediately flush
them with a large quantity of fresh
tap water. Have your eyes examined
by a doctor as soon as possible.

Brake fluid, which has been exposed
to open air for an extended time
should never be used as its quality
cannot be guaranteed. It should be
disposed of properly.

OJF075008

CAUTION

- Brake fluid

Do not allow brake fluid to con-
tact the vehicle's body paint, as
paint damage will result.

CAUTION

- Proper fluid

Only use brake fluid in brake
system.

Small amounts of

improper fluids (such as engine
oil) can cause damage to the
brake system.

Maintenance

32

8

WASHER FLUID

Checking the washer fluid
level

The reservoir is translucent so that
you can check the level with a quick
visual inspection.
Check the fluid level in the washer
fluid reservoir and add fluid if neces-
sary. Plain water may be used if
washer fluid is not available.
However, use washer solvent with
antifreeze characteristics in cold cli-
mates to prevent freezing.

WARNING

- Flammable

fluid

Do not allow the washer fluid to
come in contact with open
flames or sparks.The windshield
washer fluid reservoir is flamma-
ble under certain circumstances.
This can result in a fire.

WARNING

- Windshield

fluid

Do not drink the windshield
washer fluid. The windshield
washer fluid is poisonous to
humans and animals.

WARNING

- Coolant

• Do not use radiator coolant or

antifreeze in the washer fluid
reservoir.

• Radiator coolant can severely

obscure visibility when sprayed
on the windshield and may
cause loss of vehicle control.

OJF075009

8 33

Maintenance

Checking the parking brake

Check whether the stroke is within
specification when the parking brake
pedal is depressed with 66 lb, 294 N
(30 kg) of force. Also, the parking
brake alone should securely hold the
vehicle on a fairly steep grade. If the
stroke is more or less than specified,
have the parking brake adjusted by
an authorized Kia dealer.
Stroke : 6~7 notch

PARKING BRAKE

OJF055017

Maintenance

34

8

AIR CLEANER

Filter replacement

It must be replaced when necessary,
and should not be washed.
You can clean the filter when inspect-
ing the air cleaner element.
Clean the filter by using compressed
air.

1. Pull out the air cleaner cover.

2. Unlock by turning the locking lever

downward.

3. Pull the air cleaner filter to replace.
4. Lock the cover with the reverse

order.

OJFA078153

OJFA078154

OJFA078155

OJFA078156

8 35

Maintenance

Replace the filter according to the
Maintenance Schedule.
If the vehicle is operated in extreme-
ly dusty or sandy areas, replace the
element more often than the usual
recommended intervals. (Refer to
“Maintenance under severe usage
conditions” in this chapter.)

CAUTION -

Air filter
maintenance

• Do not drive with the air clean-

er removed; this will result in
excessive engine wear.

• When removing the air cleaner

filter, be careful that dust or
dirt does not enter the air
intake, or damage may result.

• Use a Kia genuine part. Use of

a non-genuine part could
damage the air flow sensor.

Maintenance

36

8

CLIMATE CONTROL AIR FILTER (IF EQUIPPED)

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.

1. Open the glove box and remove

the stoppers on both sides.

2. With the glove box open, pull the

support strap (1).

OJF075014

OJF075015

8 37

Maintenance

3. Remove the climate control air fil-

ter cover while pressing the lock
on the right side of the cover.

4. Replace the climate control air fil-

ter.

5. Reassemble in the reverse order

of disassembly.

When replacing the climate control
air filter install it properly. Otherwise,
the system may produce noise and
the effectiveness of the filter may be
reduced.

OJFC075125

OJFC075126

Maintenance

38

8

WIPER BLADES

Blade inspection

Commercial hot waxes applied by
automatic car washes have been
known to make the windshield diffi-
cult to clean.

Contamination of either the wind-
shield or the wiper blades with for-
eign matter can reduce the effective-
ness of the windshield wipers.
Common sources of contamination
are insects, tree sap, and hot wax
treatments used by some commer-
cial car washes. If the blades are not
wiping properly, clean both the win-
dow and the blades with a good
cleaner or mild detergent, and rinse
thoroughly with clean water.

Blade replacement

When the wipers no longer clean
adequately, the blades may be worn
or cracked, and require replacement.
To prevent damage to the wiper arms
or other components, do not attempt
to move the wipers manually.
The use of a non-specified wiper
blade could result in wiper malfunc-
tion and failure.

1JBA5122

CAUTION

- Wiper blades

To prevent damage to the wiper
blades, do not use gasoline,
kerosene, paint thinner, or other
solvents on or near them.

8 39

Maintenance

Front windshield wiper blade

To inspect or replace the windshield
wiper blades and to prevent damag-
ing the hood, move the windshield
wiper blades to the service position
as follows;
After turning off the engine, move the
wiper switch to the single wiping
(MIST) position within 20 seconds
and hold the switch more than 2 sec-
onds until the wiper blade is in the
fully up position.

Type A

1. Raise the wiper arm.
2. Lift up the wiper blade clip. Then

pull down the blade assembly and
remove it.

3. Install the new blade assembly.

OJF075016

OHM078060

OHM078061

CAUTION -

Wiper arms

• Do not allow the wiper arm to

fall against the windshield,
since it may chip or crack the
windshield.

• Do not pull wiper arm forward,

since arm could chip hood
paint.

Maintenance

40

8

4. Return the wiper arm on the wind-

shield.

5. Turn ignition to the ON position

and wiper arms will return to the
normal operating position.

Type B

1. Raise the wiper arm and turn the

wiper blade assembly to expose
the plastic locking clip.

2. Compress the clip and slide the

blade assembly downward.

3. Lift it off the arm.
4. Install the new blade assembly.

1JBA7037

1JBA7038

1LDA5023

8 41

Maintenance

5. Return the wiper arm on the wind-

shield.

6. Turn ignition to the ON position

and wiper arms will return to the
normal operating position.

Maintenance

42

8

BATTERY

For best battery service

• Keep the battery securely mount-

ed.

• Keep the battery top clean and dry.
• Keep the terminals and connec-

tions clean, tight, and coated with
petroleum jelly or terminal grease.

• Rinse any spilled electrolyte from

the battery immediately with a
solution of water and baking soda.

• If the vehicle is not going to be

used for an extended time, discon-
nect the battery cables.

Always read the following
instructions carefully when
handling a battery.

If any electrolyte gets into
your eyes, flush your eyes
with clean water for at least
15 minutes and get immedi-
ate medical attention.

If electrolyte gets on your
skin, thoroughly wash the
contacted area. If you feel
pain or burning sensation,
get medical attention imme-
diately.

An inappropriately disposed
battery can be harmful to the
environment and human
health. Dispose the battery
according to your local law(s)
or regulation.
The battery contains lead. Do
not dispose of it after use.
Please return the battery to
an authorized Kia dealer to
be recycled.

Never attempt to recharge the bat-
tery when the battery cables are con-
nected.

WARNING

- Risk of

explosion

Keep lit cigarettes and
all other flames or
sparks away from the
battery.
The battery contains
hydrogen -- a highly
combustible gas which
will explode if it comes
in contact with a flame or
spark.
Keep batteries out of the
reach of children
because batteries con-
tain highly corrosive
SULFURIC ACID and
electrolytes.

Do not

allow battery acid to
contact your skin, eyes,
clothing or paint finish.
Wear eye protection
when charging or work-
ing near a battery.
Always provide ventila-
tion when working in an
enclosed space.

OJF075020

8 43

Maintenance

✽

✽

NOTICE

If you connect unauthorized elec-
tronic devices to the battery, the bat-
tery may be discharged. Never use
unauthorized devices.

Recharging the battery

Your vehicle has a maintenance-free,
calcium-based battery.
• If the battery becomes discharged

in a short time (because, for exam-
ple, the headlamps or interior
lamps were left on while the vehi-
cle was not in use), recharge it by
slow charging (trickle) for 10 hours.

• If the battery gradually discharges

because of high electric load while
the vehicle is being used, recharge
it at 20-30A for two hours.

CALIFORNIA PROPO-

SITION 65 WARNING

Battery posts, terminals, and
related accessories contain
lead and lead compounds,
chemicals known to the State of
California to cause cancer, birth
defects and reproductive harm.
Batteries also contain other
chemicals known to the State of
California to cause cancer.
Wash hands after handling.

WARNING

- Risk of elec-

trocution

Never touch the electrical igni-
tion system while the vehicle is
running. This system works
with high voltage which can
shock you.

WARNING

- Recharging

Battery

Never attempt to recharge the
battery when the battery cables
are connected.

Maintenance

44

8

When recharging the battery,
observe the following precautions:
• The battery must be removed from

the vehicle and placed in an area
with good ventilation.

• Do not allow cigarettes, sparks, or

flame near the battery.

• Watch the battery during charging,

and stop or reduce the charging
rate if the battery cells begin
gassing (boiling) violently or if the
temperature of the electrolyte of
any cell exceeds 120°F (49°C).

• Wear eye protection when check-

ing the battery during charging.

• Disconnect the battery charger in

the following order.

1. Turn off the battery charger main

switch.

2. Unhook the negative clamp from

the negative battery terminal.

3. Unhook the positive clamp from

the positive battery terminal.

• Before performing maintenance or

recharging the battery, turn off all
accessories and stop the engine.

• The negative battery cable must be

removed first and installed last
when the battery is disconnected.

Reset items

Items should be reset after the bat-
tery has been discharged or the bat-
tery has been disconnected.
• Auto up/down window

(See chapter 4)

• Sunroof (See chapter 4)
• Trip computer (See chapter 4)
• Climate control system

(See chapter 4)

• Driver position memory system

(See chapter 3)

• Audio (See chapter 5)

8 45

Maintenance

TIRES AND WHEELS

Tire care

For proper maintenance, safety, and
maximum fuel economy, you must
always maintain recommended tire
inflation pressures and stay within
the load limits and weight distribution
recommended for your vehicle.

Recommended cold tire infla-
tion pressures

All tire pressures (including the
spare) should be checked when the
tires are cold. “Cold Tires” means the
vehicle has not been driven for at
least three hours or driven less than
one mile (1.6 km).
Recommended pressures must be
maintained for the best ride, top vehi-
cle handling, and minimum tire wear.
For recommended inflation pressure
refer to “Tire and wheels” in chapter
9.

All specifications (sizes and pres-
sures) can be found on a label
attached to the driver’s side center
pillar.

OJF085012

WARNING

- Tire underin-

flation

Inflate your tires consistent with
the instructions provided in this
manual. Severe underinflation
(10 psi (70 kPa) or more) can
lead to severe heat build-up,
causing blowouts, tread separa-
tion and other tire failures that
can result in the loss of vehicle
control. This risk is much higher
on hot days and when driving
for long periods at high speeds.