Kia Optima Hybrid: Hydraulic System / ATF Warmer Repair procedures

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Automatic Transaxle System / Hydraulic System / ATF Warmer Repair procedures

Removal

Remove the under cover (A).

Tightening torque :

7.8 ~ 11.8N.m (0.8 ~ 1.2kgf.m, 5.8 ~ 8.7 lb-ft)

2.	Drain the coolant of engine & transaxle cooling system. (Refer to Engine Mechanical System - "Coolant")

Remove the drain plug (A) and reinstall the drain plug after draining ATF totally.

Tightening torque:

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

Remove the ATF Warmer (B) after removing the hose (A).

Tightening torque :

11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)

Installation

Install in the reverse order of removal.

•	Do not reuse the drain plug gasket .

•	When tightening the clamp should be careful not to damage the hose.

•	Install the clamp in the specified direction to prevent interference with surrounding components.

•	Refill the automatic transaxle with fluid. (Refer to Hydraulic System - "Fluid")

•	Refill the engine and transaxle cooling system with coolant. (Refer to Engine Mechanical System - "Coolant")

•	Confirm the coolant leak or fluid leak from the hose connections part in state of engine start.

ATF Warmer Description and Operation

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