GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Cobalt 🢒 Engine 🢒 Engine Cooling 🢒 Catalytic Converter Replacement

Catalytic Converter Replacement LE5

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor 2 Replacement .

    3. Object Number: 1650814 Size: SH
  3. Remove the catalytic converter to the resonator pipe nuts.

    4. Object Number: 1650757 Size: SH
  4. Remove the catalytic converter to the exhaust manifold nuts.
  5. Remove the catalytic converter.
  6. Remove and discard the exhaust gaskets.
  7. Clean the flange mating surfaces of any remaining gasket material.

Installation Procedure

    Object Number: 1650757 Size: SH
  1. Install a NEW gasket onto the exhaust manifold studs.
  2. Install the catalytic converter to the exhaust manifold.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the exhaust manifold to the catalytic converter nuts.

    4. Tighten
    Tighten the catalytic converter nuts to 50 N·m (37 lb ft).


    Object Number: 1650814 Size: SH
  4. Install a NEW gasket onto the resonator pipe studs.
  5. Install the catalytic converter to resonator pipe nuts.

    6. Tighten
    Tighten the resonator pipe nuts to 30 N·m (22 lb ft).

  6. Install the heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor 2 Replacement .
  7. Inspect the exhaust system for leaks.

Catalytic Converter Replacement L61

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the wheel drive shaft heat shield. Refer to Wheel Drive Shaft Heat Shield Replacement .
  3. Remove the heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor 2 Replacement .

    4. Object Number: 1650810 Size: SH
  4. Remove the catalytic converter to the resonator pipe nuts.

    5. Object Number: 1650780 Size: SH
  5. Remove the catalytic converter to exhaust manifold nuts.
  6. Remove the catalytic converter.
  7. Discard the exhaust gaskets.
  8. Clean the flange mating surfaces of any remaining gasket material.

Installation Procedure

    Object Number: 1650780 Size: SH
  1. Install a NEW gasket onto the exhaust manifold studs.
  2. Install the catalytic converter to the exhaust manifold.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the exhaust manifold to the catalytic converter nuts.

    4. Tighten
    Tighten the catalytic converter nuts to 50 N·m (37 lb ft).


    Object Number: 1650810 Size: SH
  4. Install a NEW gasket onto the resonator pipe studs.
  5. Install the catalytic converter to the resonator pipe nuts.

    6. Tighten
    Tighten the resonator pipe nuts to 30 N·m (22 lb ft).

  6. Install the (HO2S). Refer to Heated Oxygen Sensor 2 Replacement .
  7. Install the wheel drive shaft heat shield. Refer to Wheel Drive Shaft Heat Shield Replacement .
  8. Inspect the exhaust system for leaks.

Catalytic Converter Replacement LNF


Object Number: 2001845 Size: MF

Callout

Component Name

Preliminary Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the HO2S Sensor from the Catalytic Converter. Refer to Heated Oxygen Sensor 2 Replacement .

1

Turbocharger Exhaust Pipe Nut (Qty: 4)

Notice: Refer to Fastener Notice in the Preface section.

Tighten
50 N·m (37 lb ft)

2

Catalytic Converter Nut (Qty: 3)

Tighten
46 N·m (34 lb ft)

3

Catalytic Converter

Procedure

  1. Disconnect any electrical connectors as needed.
  2. Transfer any parts as needed.