Kia Optima DL3: Intake And Exhaust System / Muffler

Components and components location

Components

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

Repair procedures

Removal and Installation

Front Muffler

1.

Disconnect the battery negative terminal.

2.

Remove the engine cover.

(Refer to Engine and Transaxle Assembly - "Engine Cover")

3.

Disconnect the oxygen sensor connector (A) and then separate from bracket..

4.

Remove the front muffler heat protector (A).

Tightening torque :

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

5.

Remove the front muffler.

(1)

Remove the front muffler hanger bracket (A).

Tightening torque :

29.4 - 39.2 N•m (3.0 - 4.0 kgf•m , 21.7 - 28.9 lb•ft)

(2)

Remove the front muffler (B).

Tightening torque :

39.2 - 58.8 N•m (4.0 - 6.0 kgf•m , 28.9 - 43.4 lb•ft)

6.

Install in the reverse order of removal.

  

When installing, replace with new gaskets.

Catalytic Converter & Center Muffler Assembly

1.

Remove the front muffler heat protector (A).

Tightening torque :

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

2.

Remove the catalytic converter & center muffler assembly.

(1)

Remove the catalytic converter & center muffler assembly hanger.

(2)

Remove the catalytic converter & center muffler assembly (A).

Tightening torque :

39.2 - 58.8 N•m (4.0 - 6.0 kgf•m , 28.9 - 43.4 lb•ft)

3.

Install in the reverse order of removal.

  

When installing, replace with new gaskets.

Rear Muffler

1.

Remove the rear muffler (A).

Tightening torque :

39.2 - 58.8 N•m (4.0 - 6.0 kgf•m , 28.9 - 43.4 lb•ft)

2.

Install in the reverse order of removal.

  

When installing, replace with new gaskets.

    Components and components location Components 1. Heat protector 2. Exhaust manifold gasket 3. Exhaust manifold 4.

    Flow diagram Engine Oil Schemetics

    Other information:

    Kia Optima DL3 2019-2026 Service and Repair Manual: Smart Key Antenna

    Repair procedures Removal Interior Antenna 1 1. Disconnect the negative battery terminal. 2. Remove the surround view monitor (SVM) unit. (Refer to Advanced Driver Assistance System (ADAS) - "Surround View Monitor (SVM) Unit") 3.

    Kia Optima DL3 2019-2026 Service and Repair Manual: Evaporator Temperature Sensor

    Description and operation Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. The evaporator temperature sensor has the Negative Temperature Coefficient (NTC).

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