Kia Optima DL3: Cooling System / Water Temperature Control Assembly

Kia Optima DL3 2019-2026 Service and Repair Manual / Engine Mechanical System / Cooling System / Water Temperature Control Assembly

Components and components location

Components

1. Water temperature control assembly
2. Engine coolant temperature sensor

3. Throttle body coolant hose

Repair procedures

Removal and Installation

1.	Remove the engine cover. (Refer to Engine and Transaxle Assembly - "Engine Cover")

2.	Drain the engine coolant. (Refer to Cooling System - "Coolant")

3.	Remove the air cleaner assembly. (Refer to Intake and Exhaust System - “Air Cleaner”)

4.	Disconnect the radiator upper hose (A).

5.	Disconnect the heater hoses (A).

6.	Disconnect the bypass hose (A).

Remove the water temperature control assembly (A) with the O-ring (B).

Tightening torque:

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

•	Install a new O-ring.

•	Clean surface on the O-ring and install the O-ring after wetting with water.

8.	Install in the reverse order of removal.

9.	Fill the engine coolant. (Refer to Cooling System - "Coolant")

10.	Start engine and check for leaks.

❮Radiator

Components and components location Components 1. Radiator 2. Radiator upper mounting bracket 3. Radiator upper hose 4.

Water pump❯

Components and components location Components 1. Water pump pulley 2. Water pump 3. Water pump gasket Repair procedures Removal and Installation 1.

Other information:

Kia Optima DL3 2019-2026 Service and Repair Manual: Integrated Body Control Unit (IBU)

Components and components location Component Location 1. Integrated Body Control Unit (IBU) Schematic diagrams Connector and Terminal Function [Non-Smart key] Pin Function Connector A Connector B

Kia Optima DL3 2019-2026 Service and Repair Manual: Auto Defogging Sensor