Kia Optima: Intake And Exhaust System / Muffler

Kia Optima DL3 2019-2025 Service and Repair Manual / Engine Mechanical System / 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..

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)

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)

Install in the reverse order of removal.

When installing, replace with new gaskets.

Catalytic Converter & Center Muffler Assembly

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)

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)

Install in the reverse order of removal.

When installing, replace with new gaskets.

Rear Muffler

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)

Install in the reverse order of removal.

When installing, replace with new gaskets.

Exhaust Manifold

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