2006 KIA Optima engine

7-13
3. Remove the engine oil filter with an
oil filter wrench.
4. Use a clean rag to clean the oil filter
mounting surface on the engine.
5. Apply a small amount of engine oil
to the new oil filter O-ring seal.6. Install the oil filter and tighten it.
(Refer to the oil filter caution label
for tightening instructions.)
7. Replace the drain plug tightly after
the oil has thoroughly drained.
8. Refill the engine with new oil to the
F mark on the dipstick. Do not
overfill.
9. Re-install the oil filler cap securely.
10. Start the engine and inspect around
the oil filter seal for leaks.
Stop the engine.
Check the oil level and fill to the F
mark, if necessary.
OIL CAPACITY
2400cc Engine
- Without filter change : 4.0 liters
- With filter change : 4.3 liters

2700cc Engine
- Without filter change : 4.5 liters
- With filter change : 4.8 liters
Use only the specified engine oil. (Refer
to “Recommended Lubricants” later in
this section)
CAUTION
Both the oil and engine are hot. Do
not burn yourself.✻
NOTICE
When installing the replacement oil
filter, do not allow the oil filter
gasket to remain on the oil filter
mounting surface. This will cause
oil leakage and engine damage.
Remove the old gasket completely
so that a new gasket will properly
seat and seal.
✻
NOTICE
• Follow these instructions
carefully. An improper oil filter
installation can cause oil leakage
and engine damage.
• Although oil filters may have the
same external appearance, their
internal designs differ
significantly. These filters are not
interchangeable. To avoid
potential engine damage, use only
the specified filter. Consult an
Authorized Kia Dealer.
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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

MAINTENANCE
7-18PARKING BRAKECHECKING THE PARKING BRAKECheck the stroke of the parking brake by
counting the number of “clicks” heard
while fully applying it from the released
position. Also, the parking brake alone
should securely hold the vehicle on a
fairly steep grade.
If the number of “clicks” is more or less
than specified, have the parking brake
adjusted by an Authorized Kia Dealer.
Stroke:
5-9 “clicks” at a force of 22 lbs. (98N).
POWER STEERINGCHECKING THE POWER
STEERING FLUID LEVELThe power steering fluid level should be
checked periodically. With the engine
off and the vehicle on level ground,
check the fluid level in the power
steering reservoir; it should be between
the MAX and MIN reservoir indicators.Before adding power steering fluid,
thoroughly clean the area around the
reservoir 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.
Use only the specified power steering fluid.
(Refer to “Recommended Lubricants”
later in this section.)
MMSA7007
MMSA7008
✻
NOTICE
To avoid damage to the power
steering pump, do not operate the
vehicle for prolonged periods with
low power steering fluid level.
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7-19
AUTOMATIC TRANSAXLECHECKING THE
AUTOMATIC TRANSAXLE
FLUID LEVELThe automatic transaxle fluid level
should be checked regularly. Take the
following precautions to measure the
fluid level properly.The volume of the transaxle fluid changes
with temperature. For that reason, it is
best to check the level after having driven
the vehicle for 30 minutes. If necessary,
however, the fluid can also be checked
when the vehicle has not been driven.
1. Park the vehicle on level ground and
set the parking brake firmly.
2. Allow the engine to idle for about 2
minutes, then depress the brake
pedal. Move the shift lever slowly
through all ranges then set it in the P
(Park) position.
3. With the engine still idling, pull the
dipstick out, wipe it clean, and
reinsert it fully.
4. Pull the dipstick out again.
The fluid level is checked as follows:
MMSA7010
CAUTION
• Low fluid level causes transaxle
slippage. Overfilling can cause
foaming, loss of fluid, and
transaxle malfunction.
• The use of a non-specified fluid
could result in transaxle
malfunction and failure.
WARNING - Parking
Brake
To avoid sudden movement of
the vehicle, set the parking
brake and depress the brake
pedal while shifting the shift
lever.
MS-CNA-Eng 7.QXD 7/25/2005 5:09 PM Page 19

USING THE HOT FLUID SCALE:If the vehicle has been driven and the
fluid is warmed to the normal operating
temperature of approximately 158~176ºF
(70~80ºC), the fluid level should be
within “HOT” range.
• Use the cold scale as a rough reference
only.
• If the outside temperature is lower than
68ºF (20ºC), start the engine and
measure the fluid level after letting the
engine reach operating temperature.• If the vehicle has been driven for an
extended period at high speeds or in
city traffic in hot weather, it is usually
best to measure the fluid level after
stopping the engine and allowing the
fluid to cool for 30 minutes.
When inserting the dipstick, be sure to
insert it completely. When adding fluid,
measure frequently with the dipstick to
make sure the fluid level does not go
above the Full position. Do not overfill.
Use only the specified automatic
transaxle fluid. (Refer to “Recommended
Lubricants” later in this section)
LUBRICANTS AND
FLUIDSCHECKING THE WASHER
FLUID LEVELCheck 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
windshield washer solvent with
antifreeze characteristics in cold climates
to prevent freezing.
MAINTENANCE
7-20
HOT
MMSA7011
MMSA7012
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7-21
BODY LUBRICATIONAll moving points of the body, such as
doors, hood hinges and locks, should be
lubricated each time the engine oil is
changed.
Use a non-freezing lubricant on locks
during cold weather.
Make sure the engine hood secondary
latch keeps the hood from opening when
the primary latch is released.
AIR CLEANERELEMENT REPLACEMENTA paper air cleaner filter is used. It must
be replaced when necessary, and should
not be cleaned and reused.
1. Remove the four (4) air cleaner cover
attaching clips.
2. Wipe the inside of the air cleaner
housing with a clean, damp cloth.
3. Replace the air cleaner element.
MMSA7013
WARNING
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 or damage to
paint and body trim.
Windshield washer fluid
agents contain some
amounts of alcohol and can
be flammable under certain
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
poisonous to humans and
animals. Do not drink and
avoid contacting windshield
washer fluid. Serious injury
or death could occur.
MS-CNA-Eng 7.QXD 7/25/2005 5:09 PM Page 21