GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the oxygen sensors. Refer to the following procedures:
  2. •  Heated Oxygen Sensor 1 Replacement in Engine Contols-1.8L (LV6)
    •  Heated Oxygen Sensor 1 Replacement in Engine Contols-1.8L (LV6)
    •  Heated Oxygen Sensor 2 Replacement in Engine Controls-1.8(LNK)
    •  Heated Oxygen Sensor 2 Replacement in Engine Controls-1.8(LNK)
  3. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  4. Object Number: 875991  Size: SH
  5. Remove the floor panel brace.

  6. Object Number: 836332  Size: SH
  7. Remove the following components from the exhaust manifold:
  8. • The 2 bolts
    • The 2 springs
  9. Remove the following components from the front pipe to the Three Way Catalytic Converter (TWC) exhaust pipe:
  10. • The 2 bolts
    • The 2 springs
  11. Remove the front pipe from the front pipe hanger (2).
  12. Remove the front pipe from the vehicle.
  13. Clean the gasket and seal the mating surfaces.

Installation Procedure

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.


    Object Number: 836332  Size: SH
  1. Install the front pipe to the vehicle.
  2. Install the front pipe to the front pipe hanger (2).
  3. Install the following components to the front pipe to the Three Way Catalytic Converter (TWC) exhaust pipe:
  4. • The 2 springs
    • The 2 bolts

    Tighten
    Tighten the front pipe-to-Three Way Catalytic Converter (TWC) exhaust pipe bolts to 43 N·m (32 lb ft).

  5. Install the following components to the exhaust manifold:
  6. • The 2 springs
    • The 2 bolts

    Tighten
    Tighten the front pipe-to-exhaust manifold bolts to 43 N·m (32 lb ft).


    Object Number: 875991  Size: SH
  7. Install the floor panel brace.
  8. Tighten
    Tighten the front pipe floor brace nuts to 30 N·m (22 lb ft).

  9. Install the oxygen sensors. Refer to the following procedures:
  10. •  Heated Oxygen Sensor 1 Replacement in Engine Contols-1.8L (LV6)
    • , Heated Oxygen Sensor 1 Replacement in Engine Contols-1.8L (LV6)
    •  Heated Oxygen Sensor 2 Replacement in Engine Controls-1.8(LNK)
    •  Heated Oxygen Sensor 2 Replacement in Engine Controls-1.8(LNK)
  11. Lower the vehicle.