Kia Optima: Hydraulic System / Oil Pump

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

Repair procedures

Removal

If ATF is leaking due to damage on O-ring, replace O-ring with a new one.

(Refer to Oil Pump - "Replacement")

Oil Pump Assembly

1.	Remove the automatic transaxle assembly. (Refer to Automatic Transaxle System - "Automatic Transaxle")

2.	Remove the torque converter (A).

Remove the converter housing (A) from the transaxle case (B).

Tightening torque :

27.5 - 34.3 N·m (2.8 - 3.5 kgf·m, 20.3 - 25.3 lbf·ft)

Remove the oil filter (B) after loosening the bolts (A).

Tightening torque :

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

Be careful that the tool does not interfere with the transaxle case when loosening the bolt.

Remove the oil pump (A) by loosening the bolts.

Tightening torque :

19.6 - 25.5 N·m (2.0 - 2.6 kgf·m, 14.5 - 18.8 lbf·ft)

6.	Remove the thrust washer (A) from the oil pump (B).

Installation

1.	Assemble the thrust washer (A) to the oil pump assembly (B).

Install the oil pump assembly (A).

Tightening torque :

19.6 - 25.5 N·m (2.0 - 2.6 kgf·m, 14.5 - 18.8 lbf·ft)

•	While assembling the oil pump, be careful not to detach the washer from the oil pump.

•	Be careful that not to damage on input shaft seal rings (A) due to interfering with input shaft while oil pump assembling.

After tighten the oil pump mounting bolts, check if the movement of input shaft is 0.55 - 0.85 mm (0.0217 - 0.03346457 in.) by pulling the spline (A) to upward direction.

If the input shaft movement value is out of specification, remove the oil pump assembly again and replace the thrust washer (A) with a new suitable thickness one.

Install the oil filter (A).

Tightening torque :

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

After properly assembled the oil filter, tighten the nut with the specified torque.

Apply the sealant (A) on the transaxle case surface.

Specified sealant : Three bond 1281B or LOCTITE FMD-546

Install the converter housing (A) on the transaxle case (B).

Tightening torque :

27.5 - 34.3 N·m (2.8 - 3.5 kgf·m, 20.3 - 25.3 lbf·ft)

•	Check the pipe seal (A) assembly condition before installing converter housing.

•	Be careful not to pinch or damage the oil pump O-ring while installing converter housing.

Install the torque converter (A).

•	To assemble perfect with drive gear on inside of oil pump, assemble the torque converter by rotating.

•	If the torque converter was improperly installed, the key (A) of oil pump gear may be damaged while installing transaxle to the engine.

8.	Install the automatic transaxle assembly. (Refer to Automatic Transaxle System - "Automatic Transaxle")

Replacement

O-Ring

1.	Remove the automatic transaxle assembly. (Refer to Automatic Transaxle System - "Automatic Transaxle")

2.	Remove the torque converter.

Remove the clutch housing (A) from the transaxle case (B).

Tightening torque :

27.5 - 34.3 N·m (2.8 - 3.5 kgf·m, 20.3 - 25.3 lbf·ft)

4.	Replace the O-ring (A) with a new one.

Apply the sealant (A) on the transaxle case surface.

Specified sealant : Three bond 1281B or LOCTITE FMD-546

Install the converter housing (A) on the transaxle case (B).

Tightening torque :

27.5 - 34.3 N·m (2.8 - 3.5 kgf·m, 20.3 - 25.3 lbf·ft)

•	Check the pipe seal (A) assembly condition before installing converter housing.

•	Be careful not to pinch or damage the oil pump O-ring when installing converter housing.

Install the torque converter (A).

•	To assemble perfect with drive gear on inside of oil pump, assemble the torque converter by rotating.

•	If the torque converter was improperly installed, the key (A) of oil pump gear may be damaged while installing transaxle to the engine.

8.	Install the automatic transaxle assembly. (Refer to Automatic Transaxle System - "Automatic Transaxle")

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