Engine Mechanical System

Muffler

11steps
~66min
3/5difficulty
Done 0 of 11

Components and Component Location

Components

1. Front muffler
2. Catalytic converter and center muffler assembly
3. Rear muffler
4. Gasket
5. Hanger

Repair Procedures

Removal and Installation

Front Muffler

  1. Disconnect the negative battery cable.

  2. Remove the engine cover.

    (See Engine and Transaxle Assembly - Engine Cover)

  3. Disconnect the oxygen sensor connector (A), then separate it from the bracket.

  4. Remove the front muffler heat shield (A).

    Tightening torque: 9.8–11.8 N·m (1.0–1.2 kgf·m, 7.2–8.7 ft-lbf)

  5. Remove the front muffler.

    1. Remove the front muffler hanger bracket (A).

      Torque: 29.4–39.2 N·m (3.0–4.0 kgf·m, 21.7–28.9 ft·lbf)

    2. Remove the front muffler (B).

      Tightening torque: 39.2–58.8 N·m (4.0–6.0 kgf·m, 28.9–43.4 lbf·ft)

  6. Install in the reverse order of removal.

Catalytic Converter & Center Muffler Assembly

  1. Remove the front muffler heat shield (A).

    Tightening torque: 9.8–11.8 N·m (1.0–1.2 kgf·m, 7.2–8.7 ft-lbf)

  2. Remove the catalytic converter and center muffler assembly.

    1. Remove the catalytic converter and center muffler hanger.

    2. Remove the catalytic converter and center muffler assembly (A).

      Tightening torque: 39.2–58.8 N·m (4.0–6.0 kgf·m, 28.9–43.4 lbf·ft)

  3. Install in the reverse order of removal.

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 lbf·ft)

  2. Install in the reverse order of removal.

Test yourself

A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.