2006 KIA Optima radiator cap

5-9
 If you believe you may have gottenyour brakes wet, apply them lightly
while driving until normal braking
operation returns.WINTER DRIVING We recommend that you carryemergency equipment. Some things
you might include are tire chains, a
window scraper, windshield de-icer,
a bag of sand or salt, flares, a small
shovel and jumper cables.
 Make sure you have sufficient ethylene glycol coolant in the
radiator.
 Check the battery condition and cables. Cold temperatures reduce the
capacity of any battery, so it must be
in top shape to provide 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 and make sure you have
sufficient fluid for your trip. (Do not
use engine coolant antifreeze.)
 Do not use the parking brake if it might freeze. This is most likely to
happen after driving in slushy or wet
conditions and temperatures drop into
the freezing range. When parking,
shift to P (Park) with automatic
transaxle, or to 1 (First) or R
(Reverse) with a manual transaxle
and block the rear wheels.
SNOW TIRESWhen snow tires are used, select the size
and construction specified on the Tire
Pressure Label. It is strongly
recommended that snow tires be used on
all four wheels, or poor handling may
result. Snow tires should not be operated
at speeds exceeding 120 km/h (75 mph).
These tires should be inflated 4 psi (28
kPa, 0.3 kg/cm
2) above the recommended pressures shown on the Tire
Specification/Pressure Label, but inflation
should never exceed the maximum cold-
tire pressure shown on the tire sidewalls.
Do not install studded tires without first
checking local, provincial and municipal
regulations for possible restrictions
against their use.
WARNING - Snow Tire
Size
Snow tires should be
equivalent in size and type to
the vehicle’s standard tires.
Otherwise, the safety and
handling of your vehicle may be
adversely affected.
MS-CNA-Eng 5 New.qxd 7/25/2005 5:21 PM Page 9

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.
4. The coolant level should then be
checked. 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
another problem that may have
caused the engine to overheat, do not
operate the engine until the problem
has been corrected. Call an
Authorized Kia Dealer for assistance.
If you do not find a leak or other
problem, carefully add coolant to the
reservoir.If the engine frequently overheats, have
the cooling system checked and repaired.
EMERGENCY STARTINGJUMP STARTINGJump starting can be dangerous if done
incorrectly. Therefore, to avoid harm to
yourself or damage to your vehicle or
battery, follow the jump starting
procedures on the next page. If in doubt,
we strongly recommend that you have a
competent technician or towing service
jump start your vehicle.
6-3
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.
✻
NOTICE
Use only a 12volt jumper system.
You can damage a 12volt starting
motor, ignition system, and other
electrical parts by using a 24-volt
power supply (two 12-volt batteries
in series or a 24-volt motor
generator set).
MS-CNA-Eng 6.QXD 7/25/2005 5:13 PM Page 3

MAINTENANCE
7-10ENGINE COMPARTMENT
MMSA7001
Air cleaner
Fuse box
Battery Battery
Windshield washer
fluid reservoir Power steering fluid
reservoirBrake fluid reservoir
Clutch fluid reservoir
Engine coolant reservoir Radiator cap Engine oil filler cap
Engine oil dipstick
2.4 liter DOHC Engine
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7-11
MMSA7002
2.7 liter DOHC Engine
Air cleaner
Fuse box
Battery
Windshield washer
fluid reservoir Power steering
fluid reservoirBrake fluid reservoir
Engine coolant reservoir Radiator cap Engine oil dipstick
Engine oil filler cap
MS-CNA-Eng 7.QXD 7/25/2005 5:09 PM Page 11

MAINTENANCE
7-14ENGINE COOLING
SYSTEMThe cooling system is a high-pressure
type with a reservoir and is filled with
year-round antifreeze coolant at the
factory.
Check the antifreeze protection and
coolant level at least once a year, at the
beginning of the winter season, and
before traveling to a colder climate.
CHECKING THE
COOLANT LEVEL
WARNING - Removing
Radiator Cap
 Never attempt to remove the
radiator cap while the engine
is operating. Doing so might
lead to cooling system
and/or engine damage and
could result in serious
personal injury from
escaping hot coolant or
steam.
 Turn the engine off and wait
until it has cooled. Even then,
use extreme care when
removing the radiator cap.
Wrap a thick towel around it,
and turn it counterclockwise
slowly to the first stop. Step
back while the pressure is
released from the cooling
system. When you are sure
all the pressure has been
released, press down on the
cap, using a thick towel, and
continue turning
counterclockwise to remove
it.
 Even if the engine is not
operating, do not remove the
radiator cap or the drain plug
while the engine and radiator
are hot. Hot coolant and
steam may still blow out
under pressure, causing
serious injury.
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7-15
Check the condition and connections of
all cooling system hoses and heater
hoses. Replace any swollen or
deteriorated hoses.
The coolant level should be full in the
radiator and between F (Full) and L
(Low) on the coolant reservoir tank
when the engine is cool.If the coolant level is low, add enough
specified coolant to provide protection
against freezing and corrosion and to
bring the level to F in the coolant
reservoir. Do not overfill. If frequent
additions are required, see an Authorized
Kia Dealer for a cooling system
inspection.
CHANGING COOLANTChange coolant according to the
Scheduled Maintenance.
• Use only soft (de-mineralized) water
in the coolant mixture.
• The engine in your vehicle has
aluminum engine parts and must be
protected by an ethylene glycol-
based coolant to prevent corrosion
and freezing.
• DO NOT USE alcohol or methanol
coolant and do not mix them with the
specified coolant.•Do not use a solution that contains
more than 60% coolant or less than
35% coolaut, which would reduce
the effectiveness of the solution.
For mixture percen-tages, refer to the
following table.
1. Turn the radiator cap counterclockwise
and remove it.
2. Loosen the radiator drain plug and
drain the coolant into a suitable
container.
MMSA7005
Coolant reservoir tank
-15°C (5°F) 35 65
-25°C (-13°F) 40 60
-35°C (-31°F) 50 50
-45°C (-49°F) 60 40Ambient
TemperatureMixture Percentage (volume)
Coolant
SolutionWater
MS-CNA-Eng 7.QXD 7/25/2005 5:09 PM Page 15

MAINTENANCE
7-163. With the drain plug loose, flush the
system with running water.
4. Drain the system completely and
retighten the drain plug. Add the
necessary amount of ethylene glycol
based coolant and water to provide
the required protection against
freezing and corrosion.
In extremely cold climates, add the
necessary amount of ethylene glycol-
based coolant in accordance with the
instructions of the coolant
manufacturer.5. Run the engine at idle with the
radiator cap off. Slowly add
additional coolant if necessary.
6. At this point, wait until the engine
reaches normal operating temperature.
Depress the accelerator two or three
times; then add coolant if required. Be
careful not to burn yourself.
7. Install the radiator cap. Inspect all
connections for leaks and recheck the
coolant level in the reservoir.
Recheck again after a few days of
driving and add coolant as necessary.
MMSA7036
Drain plugRadiator cap
MS-CNA-Eng 7.QXD 7/25/2005 5:09 PM Page 16