engine KIA Optima 2007 2.G Repair Manual

55
Driving tips
SUGGESTIONS FOR ECONOMICAL OPERATIONYour vehicle's fuel economy depends
mainly on your style of driving, where you
drive and when you drive.
Each of these factors affects how many
kilometers (miles) you can get from a liter
(gallon) of fuel. To operate your vehicle
as economically as possible, use the fol-
lowing driving suggestions to help save
money in both fuel and repairs:
 Avoid lengthy warm-up idling. Once theengine is running smoothly, begin driv-
ing. Remember, engine warm-up may
take a little longer on cold days.
 Save fuel by accelerating slowly after stopping.
 Keep the engine in tune and follow the recommended periodic maintenance
schedule. This will increase the life of
all parts and lower your operating
costs.
 Do not use the air conditioner unnec- essarily.
 Slow down when driving on rough roads.
 For longer tire life and better fuel econ- omy, always keep the tires inflated to
the recommended pressures.  Maintain a safe distance from other
vehicles to avoid sudden stops. This
will reduce wear on brake linings and
pads. Driving in such a way will also
save fuel because extra fuel is required
to accelerate back to driving speed.
 Do not carry unnecessary weight in the vehicle.
 Do not rest your foot on the brake pedal while driving. This can cause
needless wear, possible damage to the
brakes, and poor fuel economy.
 Improper wheel alignment results in faster tire wear and lower fuel econo-
my.
 Open windows at high speeds can reduce fuel economy.
 Fuel economy is less in crosswinds and headwinds. To help offset some of
this loss, slow down when driving in
these conditions.
Keeping a vehicle in good operating con-
dition is important both for economy and
safety. Therefore, have an authorized Kia
dealer perform scheduled inspections
and maintenance.
WARNING
- Engine off dur- ing motion
Never turn the engine off to coast
down hills or anytime the vehicle is
in motion. The power steering and
power brakes will not function
properly without the engine run-
ning. Instead, keep the engine on
and downshift to an appropriate
gear for engine braking effect.

Driving tips65SPECIAL DRIVING CONDITIONSHazardous driving conditions When hazardous driving conditions are
encountered such as water, snow, ice,
mud, sand, or similar hazards, follow
these suggestions:
 Drive cautiously and allow extra dis-tance for braking.
 Avoid sudden movements in braking or steering.
 When braking with non-ABS brakes pump the brake pedal with a light up-
and-down motion until the vehicle is
stopped.  If stalled in snow, mud, or sand, use
second gear. Accelerate slowly to
avoid spinning the drive wheels.
 Use sand, rock salt, tire chains, or other non-slip material under the drive
wheels to provide traction when stalled
in ice, snow, or mud.
Rocking the vehicle If it is necessary to rock the vehicle to
free it from snow, sand, or mud, first turn
the steering wheel right and left to clear
the area around your front wheels. Then,
shift back and forth between 1 (First) and
R (Reverse) in vehicles equipped with a
manual transaxle or R (Reverse) and any
forward gear in vehicles equipped with
an automatic transaxle. Do not race the
engine, and spin the wheels as little as
possible. If you are still stuck after a few
tries, have the vehicle pulled out by a tow
vehicle to avoid engine overheating and
possible damage to the transaxle.✽ ✽ NOTICEProlonged rocking may cause engine
over-heating, transaxle damage or fail-
ure, and tire damage.
CAUTION
- ABS
Do not pump the brake pedal on a
vehicle equipped with ABS.
WARNING
- Downshifting
Downshifting with an automatic
transaxle, while driving on slippery
surfaces can cause an accident.
The sudden change in tire speed
could cause the tires to skid. Be
careful when downshifting on slip-
pery surfaces.
WARNING
- Spinning tires
Do not spin the wheels, especially
at speeds more than 56 km/h (35
mph). Spinning the wheels at high
speeds when the vehicle is station-
ary could cause a tire to overheat,
explode and injure bystanders.

57
Driving tips
Driving at night Because night driving presents more
hazards than driving in the daylight, here
are some important tips to remember:
 Slow down and keep more distancebetween you and other vehicles, as it
may be more difficult to see at night,
especially in areas where there may
not be any street lights.
 Adjust your mirrors to reduce the glare from other driver's headlights.
 Keep your headlights clean and prop- erly aimed on vehicles not equipped
with the automatic headlight aiming
feature. Dirty or improperly aimed
headlights will make it much more diffi-
cult to see at night.
 Avoid staring directly at the headlights of oncoming vehicles. You could be
temporarily blinded, and it will take
several seconds for your eyes to read-
just to the darkness.
Driving in the rain Rain and wet roads can make driving
dangerous, especially if you’re not pre-
pared for the slick pavement. Here are a
few things to consider when driving in the
rain:
 A heavy rainfall will make it harder tosee and will increase the distance
needed to stop your vehicle, so slow
down.
 Keep your windshield wiping equip- ment in good shape. Replace your
windshield wiper blades when they
show signs of streaking or missing
areas on the windshield.
 If your tires are not in good condition, making a quick stop on wet pavement
can cause a skid and possibly lead to
an accident. Be sure your tires are in
good shape.
 Turn on your headlights to make it eas- ier for others to see you.
 Driving too fast through large puddles can affect your brakes. If you must go
through puddles, try to drive through
them slowly.
 If you believe you may have gotten your brakes wet, apply them lightly
while driving until normal braking oper-
ation returns.
Winter driving We recommend that you carry emer-gency equipment, including a window
scraper, windshield de-icer, a bag of
sand or salt, flares, a small shovel and
jumper cables.
 Make sure you have sufficient ethyl- ene-glycol coolant in the radiator.
 Check the battery condition and cables. Cold temperatures reduce the
output capability of any battery, so it
must be in excellent condition to pro-
vide enough winter starting power.
 Make sure the engine oil viscosity is suitable for cold weather.
 Check the ignition system for loose connections and damage.
 Use antifreeze-formulated windshield washer fluid. (Do not use engine
coolant antifreeze.)
 Do not use the parking brake if it might freeze. When parking, shift to 1 (First)
or R (Reverse) with a manual transaxle
or P (Park) with an automatic transaxle
and block the rear wheels.

59
Driving tips
TRAILER TOWING✽
✽NOTICE
Pulling a trailer improperly can damage
your vehicle and result in costly repairs
not covered by your warranty. To identify what the vehicle trailering
capacity is for your vehicle, you should
refer to the chart on this page. Remember that trailering is different than
just driving your vehicle by itself.
Trailering causes major changes in han-
dling, durability, and fuel economy.
Successful, safe trailering requires cor-
rect equipment, and cautious driving.
This section contains many time-tested,
important trailering tips and safety rules.
Many of these are important for your
safety and that of your passengers.
Please read this section carefully before
you pull a trailer.
WARNING
- Towing a trail-
er
If you don't use the correct equip-
ment or you drive improperly, you
can lose control when you pull a
trailer. For example, if the trailer is
too heavy, the brakes may fail, and
would at least be ineffective to
promptly stop the vehicle. You and
your passengers could be seriously
or fatally injured. Pull a trailer only if
you have followed all the steps in
this section.
WARNING
- Weight limits
Before towing, make sure the total
trailer weight, gross combination
weight, gross vehicle weight, gross
axle weight and trailer tongue load
are all within the limits.
Engine 2.4 Engine 2.7 Engine
Item MT
*1
AT
*2
AT
*2
Maximum trailer Without trailer brakes 454 (1000) *3454 (1000)
weight kg (lbs.) With trailer brakes 907 (2000) *3907 (2000)
Maximum permissible static vertical 80 (176)*380 (176)
load on the coupling device kg (lbs.)*1MT : Manual transaxle
*2AT : Automatic transaxle
*3 : Do not use this vehicle for trailer towing.

Driving tips10
5Load-pulling components such as the
engine, transaxle, wheel assemblies, and
tires are forced to work harder against
the load of the added weight. The engine
is required to operate at relatively higher
speeds and under greater loads. This
additional burden generates extra heat
which creates more wear in engine, and
a shortened engine life. The trailer also
adds considerably to wind resistance,
increasing the pulling requirements.Hitches It's important to have the correct hitch
equipment. Crosswinds, large trucks
going by, and rough roads are a few rea-
sons why you’ll need the right hitch. Here
are some rules to follow:
 Do not attach a trailer hitch which
requires you to alter other parts on
your vehicle.
 Never make a hole in your vehicle to accommodate a hitch.
 The bumpers on your vehicle are not intended for hitches. Do not attach
rental hitches or other bumper-type
hitches to them. Use only a frame-
mounted hitch that does not attach to
the bumper.
Safety chains You should always attach chains
between your vehicle and your trailer.
Cross the safety chains under the tongue
of the trailer so that the tongue will not
drop to the road if it becomes separated
from the hitch.
Instructions about safety chains may be
provided by the hitch manufacturer or by
the trailer manufacturer. Follow the man-
ufacturer’s recommendation for attaching
safety chains. Always leave just enough
slack so you can turn with your trailer.
And, never allow safety chains to drag on
the ground.
Trailer brakes If your trailer weighs more than the max-
imum weight for a trailer without brakes,
then the trailer needs its own brakes. You
must consult with a knowledgeable and
reputabel trailer vendor to determine
which brake equipped trailer is right for
your needs. Be sure to read and follow
the instructions for the trailer brakes so
you’ll be able to install, adjust and main-
tain them properly.
WARNING
If you damage the body of your car,
installing, or using a trailer hitch,
you must have any resulting hole
immediately repaired, An unsealed
hole can allow deadly carbon
monoxide (CO) from your exhaust
into your vehicle.
WARNING
- Trailer brakes
Do not use a trailer with its own
brakes unless you are absolutely
certain that you have properly set
up the brake system pursuant to
the trailer manufacture’s instruc-
tions. This is not a task for ama-
teurs. Use an experienced, compe-
tent trailer shop for this work.
WARNING
- Trailer andvehicle brakes
NEVER connect or allow anyone
else to connect your vehicle’s
brakes to any trailer brake system.
Altering your vehicle’s brakes could
result in total brake failure.

Driving tips12
5✽
✽
NOTICEFailure to sue a trailer wiring harness
can damage your vehicle’s electrical sys-
tem.Driving on grades Reduce speed and shift to a lower gear
before you start down a long or steep
downgrade. If you don’t shift down, you
might have to use your brakes so much
that they would get hot and no longer
operate efficiently.
On a long uphill grade, shift down and
reduce your speed to around 70 km/h (45
mph) to reduce the possibility of engine
and transaxle overheating.
Operating your vehicle in D (Drive) when
towing a trailer will minimize heat build up
and extend the life of your transaxle.
Parking on hills Generally, you should not park your vehi-
cle, with a trailer attached, on a hill.
People can be seriously or fatally injured,
and both your vehicle and the trailer can
be damaged if they begin a downhill.
However, if you ever have to park your
trailer on a hill, here’s how to do it: 1. Apply your brakes, but don’t shift into
gear.
2. Have someone place chocks (blocks of wood or metal intended for this pur-
pose) under the downhill sides of the
trailer wheels.
3. When the wheel chocks are in place, release the brakes until the chocks
absorb the load.
4. Reapply the brakes. Apply your park- ing brake, and then shift to P (Park) for
an automatic transaxle.
5. Release the brakes.
CAUTION
When towing a trailer on steep grades (in excess of 6%) pay closeattention to the engine coolant tem-perature gauge to ensure theengine does not overheat. If theneedle of the coolant temperaturegauge moves across the dialtowards “H” (HOT), pull over andstop as soon as it is safe to do so,and allow the engine to idle until itcools down. You may proceed oncethe engine has cooled sufficiently.
WARNING
- Parking on a
hill
Parking your vehicle on a hill with a
trailer attached is dangerous. It
could cause serious injury or death,
should the trailer break lose, or
should the trailer drag the vehicle
downhill.
WARNING
- Parking brake
It can be dangerous to get out of
your vehicle if the parking brake is
not firmly set or if the engine is still
running.
In either case the vehicle can move
suddenly. You or others could be
seriously or fatally injured.

513
Driving tips
When you are ready to leave afterparking on a hill 1. With the automatic transaxle in P (Park), apply your brakes and hold the
brake pedal down while you:
 Start your engine;
 Shift into gear; and
 Release the parking brake.
2. Slowly remove your foot from the brake pedal.
3. Drive slowly forward until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.Maintenance when trailer towing Your vehicle will need service more often
when you regularly pull a trailer.
Important items to pay particular atten-
tion to include engine oil, automatic
transaxle fluid, axle lubricant and cooling
system fluid. Brake condition is another
important item to frequently check. Each
item is covered in this manual, and the
Index will help you find them quickly. If
you’re trailering, it’s a good idea to review
these sections before you start your trip. Don’t forget to also maintain your trailer
and hitch. Follow the maintenance
schedule that accompanied your trailer
and check it periodically. Preferably, con-
duct the check at the start of each day’s
driving. Most importantly, all hitch nuts
and bolts should be tight.
✽ ✽
NOTICE• Due to higher load during trailer
usage, overheating might occur in hot
days or during uphill driving. If the
coolant gauge indicates over-heating,
switch off the A/C and stop the vehicle
in a safe area to cool down the engine.
• When towing check transaxle fluid more frequently.
• If your vehicle is not equipped with the air conditioner, you should install
a condenser fan to improve engine
performance when towing a trailer.
If you do decide to pull a trailerHere are some important points if you
decide to pull a trailer:
 Consider using a sway control. You can
ask a hitch dealer about sway control.
 After your odometer indicates 800 km (500 miles) or more, you can tow a
trailer. For the first 800 km (500 miles)
that you tow a trailer, don’t drive over
80 km/h (50 mph) and don’t make
starts at full throttle. This helps your
engine and other parts of your vehicle
“wear” in at the heavier loads.
 Always drive your vehicle at a moder- ate speed (less than 100 km/h (60
mph)).
 On a long uphill grade, do not exceed 70 km/h (45 mph) or the posted towing
speed limit, whichever is lower.
 The important considerations have to do with weight:
Weight of the trailer
How heavy can a trailer safely be? It
should never weigh more than the maxi-
mum trailer weight with trailer brakes. But
even that can be too heavy. If you feel that
the trailer is adversely affecting the move-
ment of your vehicle, reduce your speed,
avoid uneven or winding roads, avoid
roads with steep grades, and/or lighten
your trailer load.

Driving tips16
5Tire specification / pressure label
Engine number
OMG055004N
OMG055007OMG055008
2.4 Gasoline engine2.7 Gasoline engine

In case of an emergency26ROAD WARNING Hazard warning flasher The hazard warning flasher serves as a
warning to other drivers to exercise
extreme caution when approaching,
overtaking, or passing your vehicle. It
should be used whenever emergency
repairs are being made or when the vehi-
cle is stopped near the edge of a road-
way.
Depress the flasher switch with the igni-
tion switch in any position. The flasher
switch is located in the center console
switch panel. All turn signal lights will
flash simultaneously.• The hazard warning flasher operates
whether your vehicle is running or not.
 The turn signals do not work when the hazard flasher is on.
 Care must be taken when using the hazard warning flasher while the vehi-
cle is being towed. If your temperature gauge indicates over-
heating, if you experience a loss of
power, or if you hear a loud knocking or
pinging noise, the engine has probably
overheated. Should any of these symp-
toms occur, use the following procedure:
1. Turn on the hazard warning flasher,
then drive to the nearest safe location
and stop your vehicle; set the automat-
ic transaxle in P (Park), or shift the
manual transaxle to N (Neutral) and
apply the parking brake.
2. Make sure the air conditioner is off.
3. If coolant or steam is boiling out of the radiator, stop the engine and call an
authorized Kia dealer for assistance.
If coolant is not boiling out, allow the
engine to idle and open the hood to
permit the engine to cool gradually.
If the temperature does not go down
with the engine idling, stop the engine
and allow sufficient time for it to cool.
OVERHEATING
OMG065001

63
In case of an emergency
4. The coolant level should then bechecked. If the level in the reservoir is
low, look for leaks at the radiator hoses
and connections, heater hoses and
connections, radiator, and water
pump. If you find a major leak or anoth-
er problem that may have caused the
engine to overheat, do not operate the
engine until it has been corrected. Call
an authorized Kia dealer for assis-
tance. If you do not find a leak or other
problem, carefully add coolant to the
reservoir.If the engine frequently overheats, havethe cooling system checked and repairedby an authorized Kia dealer.
Jump starting Jump starting can be dangerous if done
incorrectly. Therefore, to avoid harm to
yourself or damage to your vehicle or
battery, follow the jump starting proce-
dures. If in doubt, we strongly recom-
mend that you have a competent techni-
cian or towing service jump start your
vehicle.✽ ✽ NOTICEUse only a 12-volt jumper system. You
can damage a 12-volt starting motor,
ignition system, and other electrical
parts beyond repair by use of a 24-volt
power supply (either two 12-volt batter-
ies in series or a 24-volt motor generator
set).
WARNING
- Removing
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. This
could cause serious injury.
EMERGENCY STARTING
WARNING
- Battery
• Keep all flames or sparks away
from the battery. The battery pro-
duces hydrogen gas which may
explode if exposed to flame or
sparks.
 Do not attempt to jump start the vehicle if the discharged battery
is frozen or if the electrolyte level
is low; the battery may rupture or
explode.
WARNING
- Battery
Never attempt to check the elec-
trolyte level of the battery as this
may cause the battery to rupture or
explode causing serious injury.