Kia Optima: Intake And Exhaust System / Exhaust Manifold

Kia Optima DL3 2019-2023 Service and Repair Manual / Engine Mechanical System / Intake And Exhaust System / Exhaust Manifold

Components and components location

Components

1. Heat protector
2. Exhaust manifold gasket

3. Exhaust manifold
4. Exhaust manifold stay

Repair procedures

Removal and Installation

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

2.	Disconnect the battery negative terminal.

3.	Disconnect the front and heated oxygen sensor connect (A) and remove them from the bracket.

4.	Remove the engine room under cover. (Refer to Engine and Transaxle Assembly - “Engine Room Under Cover”)

5.	Remove the front muffler. (Refer to Intake and Exhaust System - "Muffler")

Remove the exhaust manifold heat protector (A).

Tightening torque :

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

Remove the exhaust manifold stay (A).

Tightening torque :

39.2 - 49.0 N•m (4.0 - 5.0 kgf•m, 28.9 - 36.2 lb•ft)

Remove the exhaust manifold (A).

Tightening torque :

29.4 - 34.3 N•m (3.0 - 3.5 kgf•m, 21.7 - 25.3 lb•ft)

When installing the exhaust manifold, tighten the nuts with pre-torque first, and then tighten the nuts with specified torque in the sequence shown.

Remove the exhaust manifold gasket (A).

When installing, replace with a new gasket.

10.	Install in the reverse order of removal.

Variable Intake Solenoid(VIS) Actuator

Repair procedures Removal and Installation 1. Disconnect the vacuum hose (A). 2. Remove the variable Intake solenoid (VIS) actuator (B) ...

Muffler

Components and components location Components 1. Front muffler 2. Catalytic converter & Center muffler assembly 3. Rear muffler 4. Gasket 5. Hanger ...

Other information:

Kia Optima DL3 2019-2023 Service and Repair Manual: Auto Light Sensor

Schematic diagrams Circuit Diagram Repair procedures Removal 1. Disconnect the negative battery terminal. 2. Remove the photo sensor & auto light sensor (A) by pressing the locking pins. 3. ...

Kia Optima DL3 2019-2023 Service and Repair Manual: Heated Oxygen Sensor (HO2S)

Description and operation Description • Heated Oxygen Sensor (HO2S), consisting of zirconium and alumina, is installed on both upstream and downstream of the Manifold Catalytic Converter (MCC) to detect the air/fuel ratio and send it to the ECM. ...