Kia Optima: 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 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.

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.
Check the coolant level using the dipstick attached to the reservoir cap.

If the coolant level is low, add enough coolant to bring the level to F, but
do not overfill. If frequent additions are required, see an authorized Kia dealer
or another competent repair center for a cooling system inspection.
The high-pressure cooling system has a reservoir filled with year-round antifreeze
coolant. The reservoir is filled at the factory.
Check the antifreeze protection and coolant level at least once a ...
Change 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
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See also:
Before starting
Close and lock all doors.
Position the seat so that all controls are easily reached.
Adjust the inside and outside rearview mirrors.
Be sure that all lights work.
Check all gauges.
Check ...
Removal
1.
Turn ignition switch OFF and
disconnect the negative (-) battery cable.
2.
Remove the air duct (B) and air
cleaner assembly (A).
3.
Disconn ...
Underdrive Brake Control Solenoid Valve(UD/B_VFS). Schematic Diagrams
Circuit Diagram
...