Removal Procedure

WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Raise and suitably support the vehicle.
Remove the catalytic converter. Refer to Catalytic Converter Replacement (3.8L Engine) .
Remove the connector position assurance (CPA) lock.
Disconnect the oxygen sensor electrical connector (3) from the harness.

Fig 1: Disconnecting Oxygen Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Remove the oxygen sensor connector rosebud from the engine lift bracket.
Remove the oxygen sensor.

Fig 2: Removing Oxygen Sensor
Courtesy of GENERAL MOTORS CORP.
Disconnect the numbers 4 and 6 spark plug wires from the spark plugs.

Fig 3: Disconnecting Numbers 4 And 6 Spark Plug Wires
Courtesy of GENERAL MOTORS CORP.
Remove the number 6 spark plug from the cylinder head.

Fig 4: Removing Number 6 Spark Plug
Courtesy of GENERAL MOTORS CORP.
Remove the two rear exhaust manifold studs and nut from the exhaust manifold.
Lower the vehicle.

Fig 5: Removing Two Rear Exhaust Manifold Studs
Courtesy of GENERAL MOTORS CORP.
Disconnect the number 2 spark plug wire from the spark plug.

Fig 6: Disconnecting Number 2 Spark Plug Wire
Courtesy of GENERAL MOTORS CORP.
Remove the numbers 2 and 4 spark plugs from the cylinder head.

Fig 7: Removing Numbers 2 And 4 Spark Plugs
Courtesy of GENERAL MOTORS CORP.
Remove the exhaust manifold heat shield nuts.
Remove the exhaust manifold heat shield from the exhaust manifold.

Fig 8: Removing Exhaust Manifold Heat Shield Nuts
Courtesy of GENERAL MOTORS CORP.
Remove the two front exhaust manifold studs and nut from the exhaust manifold.
Remove the right exhaust manifold and gasket from the cylinder head.
Remove the heat shield studs from the exhaust manifold, if necessary.

Fig 9: Removing Two Front Exhaust Manifold Studs And Nut
Courtesy of GENERAL MOTORS CORP.