2007 KIA Optima engine

713
Maintenance
Engine coolant Use only soft (de-mineralized) water inthe coolant mixture.
 The engine in your vehicle has alu- minum engine parts and must be pro-
tected by an ethylene-glycol-based
coolant to prevent corrosion and freez-
ing.
 DO NOT USE alcohol or methanol coolant or mix them with the specified
coolant.
 Do not use a solution that contains more than 60% antifreeze or less than
35% antifreeze, which would reduce
the effectiveness of the solution. For mixture percentage, refer to the fol-
lowing table.
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 caus-
ing serious injury.
5°F (-15°C) 35
65
-13°F (-25°C) 40 60
-31°F (-35°C) 50 50
-49°F (-45°C) 60 40Ambient
Temperature Mixture Percentage (volume)
Coolant
Solution Water
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Maintenance14
7BRAKE FLUID Checking brake fluid level Check the fluid level in the reservoir peri-
odically. The fluid level should be
between MAX and MIN marks on the
side of the reservoir.
Before removing the reservoir cap and
adding brake fluid, clean the area around
the reservoir cap thoroughly to prevent
brake fluid contamination.
If your vehicle is equipped with a manual
transaxle, brake fluid is used as clutch
fluid. If the level is low, add fluid to the MAX
level. The level will fall with accumulated
mileage. This is a normal condition asso-
ciated with the wear of the 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” later in this section.)
Never mix different types of fluid.
✽ ✽ NOTICEDo not allow brake fluid to contact the
vehicle's body paint, as paint damage
will result. Brake fluid, which has been
exposed to open air for an extended time
should never be used as its quality can-
not be guaranteed. It should be thrown
out. Don't put in the wrong kind of fluid.
A few drops of mineral-based oil, such
as engine oil, in your brake/clutch sys-
tem can damage brake/clutch system
parts.
WARNING -
Brake fluid
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.
WARNING -
Loss of brake
fluid
In the event the brake system
requires frequent additions of fluid,
the vehicle should be inspected by
an authorized Kia dealer.
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715
Maintenance
DRIVE BELTSDrive belts should be checked periodical-
ly for proper tension and replaced if nec-
essary. At the same time, belts should be
examined for cracks, wear, fraying or
other evidence of deterioration and
replaced if necessary.
Belt routing should also be checked to be
sure there is no interference between the
belts and other parts of the engine.
If the belt is too loose, have it replaced by
an authorized Kia dealer.Checking the compressor drive
beltHave the drive belts checked in accor-
dance with the maintenance schedule.
Checking the power steering fluid
level With the vehicle on level ground, check
the fluid level in the power steering reser-
voir periodically. The fluid should be
between MAX and MIN marks on the
side of the reservoir at the normal tem-
perature.
Before adding power steering fluid, thor-
oughly clean the area around the reser-
voir cap to prevent power steering fluid
contamination.
If the level is low, add fluid to the MAX
level.In the event the power steering system
requires frequent addition of fluid, the
vehicle should be inspected by an
authorized Kia dealer.
✽ ✽
NOTICE• To avoid damage to the power steer-
ing pump, do not operate the vehicle
for prolonged periods with a low
power steering fluid level.
• Never start the engine when the reser- voir tank is empty.
• When adding fluid, be careful that dirt does not get into the tank.
• Insufficient fluid can result in increased steering effort; excessive
noise may also be present as the steer-
ing wheel is turned.
• The use of the non-specified fluid could reduce the effectiveness of the
power steering wheel and cause dam-
age to it.Use only the specified power steering
fluid. (Refer to "Recommended Lubricants" later in this section.)Power steering hoseCheck the hoses and hose connections
for leaks or damage before driving the
vehicle.
POWER STEERING (IF EQUIPPED)
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Maintenance16
7AUTOMATIC TRANSAXLE (IF EQUIPPED)Checking the automatic transaxle
fluid level The automatic transaxle fluid level
should be checked regularly.
The volume of the transaxle fluid
changes with temperature. Although it is
best to check the level after having driv-
en the vehicle for at least 30 minutes, the
level can be checked after warming the
fluid using the following procedure.
1. Park the vehicle on level ground and
firmly apply the parking brake.
2. Allow the engine to idle for about 2 minutes.
3. Depress the brake pedal and move the shift lever slowly through all ranges
then set it in P (Park). 4. With the engine still idling, pull out the
dipstick, wipe it clean and reinsert it
fully.
5. Pull out the dipstick again and check the fluid level.
✽ ✽NOTICE• Low fluid level causes transaxle slip-
page. Overfilling can cause foaming,
loss of fluid and transaxle malfunc-
tion.
• The use of a non-specified fluid could result in transaxle malfunction and
failure.
If the fluid has been warmed to normal
operating temperature of approximately
70~80°C (158~176°F), the fluid level
should be within “HOT” range.
“COLD” scale is for reference only
and should NOT be used to determine
transaxle fluid level.
WARNING -
Transaxle fluid
The transaxle fluid level should be
checked when the engine is at nor-
mal operating temperature. This
means that the engine, radiator,
radiator hose and exhaust system
etc., are very hot. Exercise great
care not to burn yourself during this
procedure.
WARNING
- Parking brake
To avoid sudden movement of the
vehicle, apply parking brake and
depress the brake pedal before
moving the shift lever.
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717
Maintenance
New automatic transaxle fluid should
be red. The red dye is added so the
assembly plant can identify it as auto-
matic transaxle fluid and distinguish it
from engine oil or antifreeze. The red
dye, which is not an indicator of fluid
quality, is not permanent. As the vehi-
cle is driven, the automatic transaxle
fluid will begin to look darker. The
color may eventually appear light
brown.✽ ✽NOTICEHave an Authorized Kia dealer inspect
or change the automatic transaxle fluid
according to the Scheduled
Maintenance at the beginning of this
section.Changing automatic transaxle
fluidHave automatic transaxle fluid changed
by an authorized Kia dealer according to
the Maintenance Schedule at the begin-
ning of this section.
Use only the specified automatic
transaxle fluid. (Refer to "Recommended
Lubricants" later in this section.)
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 necessary. 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.
Body lubrication All moving points of the body, such as
door hinges, hood hinges, and locks,
should be lubricated each time the
engine oil is changed. Use a non-freez-
ing lubricant on locks during cold weath-
er.
Make sure the engine hood secondary
latch keeps the hood from opening when
the primary latch is released.
LUBRICANTS AND FLUIDS
WARNING
- Coolant
 Do not use radiator coolant or
antifreeze in the washer fluid
reservoir.
(Continued)
(Continued)
 Radiator coolant can severelyobscure visibility when sprayed
on the windshield and may cause
loss of vehicle control or damage
to paint and body trim.
 Windshield washer fluid agents contain some amounts of alcohol
and can be flammable under cer-
tain circumstances. Do not allow
sparks or flame to contact the
washer fluid or the washer fluid
reservoir. Damage to the vehicle
or it's occupants could occur.
 Windshield washer fluid is poi- sonous to humans and animals.
Do not drink and avoid contacting
windshield washer fluid. Serious
injury or death could occur.
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Maintenance18
7Element cleaningThis element may be air cleaned or
replaced, depending on its condition.
Unless it is very dirty, merely shake it to
remove foreign particles. Each time this
filter is inspected, wipe the inside of the
air cleaner housing and cover with a
damp cloth. If the vehicle is operated in
extremely dusty or sandy areas, clean or
replace this element more often than at
the usual recommended intervals.
✽ ✽
NOTICEDo not drive with the air cleaner ele-
ment removed; this will result in exces-
sive engine wear.
AIR CLEANER
OMG075012
CAUTION -
Air cleaner
Operating the engine without the air
cleaner may result in poor perform-ance, emission control malfunction,and/or engine damage.

Maintenance22
7
For best battery service : Keep the battery securely mounted.
 Keep the top of the battery clean and
dry.
 Keep the terminals and connections 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, disconnect the bat-
tery cables.
Battery recharging Your vehicle has a maintenance-free,
calcium-based battery.
 If the battery becomes discharged in ashort time (because, for example, the
headlights or interior lights were left on
while the vehicle 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.Items to be reset after the battery hasbeen discharged or the battery hasbeen disconnected. Clock (See Chapter 3)
 Climate control system (See Chapter 4)
 Audio (See Chapter 3)
 Sunroof (See Chapter 3)
(Continued)
 When lifting a plastic-cased bat- tery, excessive pressure on the
case may cause battery acid to
leak, resulting in personal injury.
Lift with a battery carrier or with
your hands on opposite corners.
 Never attempt to charge the bat- tery when the battery cables are
connected.
 The electrical ignition system works with high voltage. Never
touch these components with the
engine running or the ignition
switched on.
Failure to follow the above warn-
ings can result in serious bodily
injury or death.
OMG075021

723
Maintenance
✽
✽NOTICE• 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.
WARNING
- Recharging
battery
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 charg- ing, and stop or reduce the charg-
ing rate if the battery cells begin
gassing (boiling) violently or if
the temperature of the electrolyte
of any cell exceeds 49°C (120°F).
 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.