Kia Optima Hybrid: Hydraulic System / ATF Warmer Description and Operation

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Automatic Transaxle System / Hydraulic System / ATF Warmer Description and Operation

Description

The ATF warmer is mounted on the valve body cover to reduce oil viscosity friction by increasing oil temperature under cold condition, which in turn improves fuel efficiency. It is serial mounted on the entry of the Electronic Throttle Controller (ETC), as shown in the diagram, and minimizes the effects of cabin heating system.

–	Engine coolant is used for circulating heat in order to heat and cool the transaxle oil.

–	Rapidly elevates the transaxle oil temperature during the initial cold start of the engine.

–	Prevents over heating of the transaxle oil while the vehicle is moving.

–	Transaxle oil warm-up and cooling can be done with a single system.

–	The water coolant and oil are separate in order to exchange heat. Coolant Flow

Valve Body Repair procedures

Removal • Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage system. Failure to follow the safety instructions ...

ATF Warmer Repair procedures

Removal 1. 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 ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Valve Body Components and Components Location

Component Location 1. Automatic transaxle2. Valve body assembly Component 1. Pressure Control Valve(PCV) adjust screw8. Underdrive Brake Control Solenoid Valve(UD/B)2. Solenoid valve bracket9. 26 Brake Control Solenoid Valve(26/B)3. Oil temperature sensor10. 35R Clutch Control Solenoid Valve(35R/C)4. ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Wheel Repair procedures

Hub nut tightening sequence Tighten the hub nuts as follows. Tightening torque: 88.3 ~ 107.9N.m (9.0 ~ 11.0kgf.m, 65.1 ~ 79.6lb-ft) When using an impact gun, final tightening torque should be checked using a torque wrench. Run out inspection 1. Jack up the vehicle. 2. Measure the wheel ...