Catalytic Converter: Service and Repair

REMOVAL
1. Disconnect negative battery cable.
2. Raise vehicle on hoist.
3. Disconnect downstream oxygen sensor electrical connector and remove oxygen sensor.
4. Support exhaust system with jack stand.
5. Remove isolators from exhaust pipe supports.
6. Apply penetrating oil and loosen the Band clamps that retain the front converter pipes to the muffler. Separate the muffler from the catalytic converter pipes.
7. Remove V-Band clamp at manifold to converter connection. Do not re-use V-Band clamp.
8. Remove bolt attaching converter pipe hanger to engine bell housing bracket.
9. Remove catalytic converter(s).
10. Remove and discard V-Band clamp.

INSTALLATION
1. Install a new V-Band clamp over exhaust manifold coupling flange. Install clamp with nut facing downward.
2. Install converter(s) to exhaust manifold and position V-Band clamp over manifold and converter flanges. Tighten V-Band clamp to 11 Nm (100 inch lbs.).
3. Install converter pipe hanger bolt to engine bell housing bracket. Torque to 47 Nm (35 ft. lbs.).
4. Install exhaust system and exhaust support isolators.
5. Tighten Band clamps to 70 Nm (52 ft. lbs.).
6. Install downstream oxygen sensor(s). Torque to 28 Nm (250 inch lbs.).
7. Lower vehicle.
8. Connect negative battery cable.