Kia Optima: Hydraulic System / Fluid

Kia Optima DL3 2019-2025 Service and Repair Manual / Automatic Transaxle System / Hydraulic System / Fluid

Repair procedures

Inspection

Automatic Transaxle Fluid (ATF) Level Check

When checking the ATF level, be careful not to allow foreign substance (like dust) to enter through the filler hole.

1.	Remove the inhibitor switch. (Refer to Automatic Transaxle Control System - "Inhibitor Switch")

2.	Add 0.7 liters of ATF SP-IV through the ATF filler hole after removing the eyebolt (A).

Start the engine to warm up the ATF.

Do not step on the brake and accelerator simultaneously to warm up the ATF.

4.	Check by using KDS that the temperature of the ATF is between 50°C and 60°C (122 - 140°F).

Move the shift lever slowly from "P" to "D", then back to "P". Repeat this sequence two times and then move the shift lever to "P" range.

Maintain at each speed position for more than 2 sec.

6.	Remove the under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover")

Lift the vehicle and remove the ATF level plug (A) from the valve body cover.

When removing the ATF level plug, keep the vehicle on a level ground.

Check the ATF level.

Normal: ATF flows out in a thin oil stream.

Excessive (abnormal): Over 0.9 liters of ATF flows out for 2 minutes.

Insufficient (abnormal): There is no fluid flow.

If the ATF level is too high or low, follow the instructions below.

•	Excessive: Drain until the ATF flows out in a thin oil stream.

•	Insufficient: Add until the ATF flows out in a thin oil stream.

Install the ATF level plug (A).

The existing ATF level plug O-ring (A) must be replaced with a new one. (Do not reuse it.)

10.

Lower the vehicle and install the eyebolt (A).

The existing eyebolt washer (A) must be replaced with a new one. (Do not reuse it.)

11.	Install the inhibitor switch. (Refer to Automatic Transaxle Control System - "Inhibitor Switch")

Replacement

1.	Remove the under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover")

Remove the ATF drain plug (A), allow the fluid to drain out and then reinstall the drain plug.

Tightening torque:

33.3 - 43.1 N·m (3.4 - 4.4 kgf·m, 24.6 - 31.8 lb·ft)

The existing ATF drain plug gasket must be replaced with a new one. (Do not reuse it.)

3.	Remove the inhibitor switch. (Refer to Automatic Transaxle Control System - "Inhibitor Switch")

4.	Remove the eyebolt (A).

5.	Fill the automatic transaxle with about 5.0 liters of ATF SP-IV through the ATF filler hole.

6.	Perform the ATF level check procedure. (Refer to Fluid - "Inspection")

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