Installation 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.

Install the heat shield stud to the exhaust manifold, if necessary.

Fig 1: Installing Heat Shield Stud To Exhaust Manifold
Courtesy of GENERAL MOTORS CORP.
Install the right exhaust manifold gasket and manifold to the cylinder head studs.
NOTE: 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.
Install the two front exhaust manifold studs and nuts to the exhaust manifold.
Tighten
- Tighten the two front exhaust manifold studs to 15 N.m (11 ft lbs).
- Tighten the exhaust manifold nuts to 18 N.m (13 ft lbs).
Install the exhaust manifold heat shield to the exhaust manifold.
Install the exhaust manifold heat shield nut.
Tighten

Tighten the exhaust manifold heat shield nuts to 10 N.m (89 Inch lbs).

Fig 2: Installing Exhaust Manifold Heat Shield
Courtesy of GENERAL MOTORS CORP.
Install the numbers 2 and 4 spark plugs to the cylinder head.
Tighten

Tighten the numbers 2 and 4 spark plugs to 27 N.m (20 ft lbs).

Fig 3: Installing Numbers 2 And 4 Spark Plugs
Courtesy of GENERAL MOTORS CORP.
Connect the number 2 spark plug wire to the spark plug.
Raise the vehicle.

Fig 4: Connecting Number 2 Spark Plug Wire
Courtesy of GENERAL MOTORS CORP.
Install the two rear exhaust manifold studs and nut to the exhaust manifold.
Tighten
- Tighten the two rear exhaust manifold studs to 15 N.m (11 ft lbs).
- Tighten the exhaust manifold nut to 18 N.m (13 ft lbs).
Fig 5: Installing Two Rear Exhaust Manifold Studs
Courtesy of GENERAL MOTORS CORP.
Install the number 6 spark plug to the cylinder head.
Tighten

Tighten the number 6 spark plug to 27 N.m (20 ft lbs).

Fig 6: Installing Number 6 Spark Plug To Cylinder Head
Courtesy of GENERAL MOTORS CORP.
Connect the numbers 4 and 6 spark plug wires to the spark plugs.

Fig 7: Connecting Numbers 4 And 6 Spark Plug Wires To Spark Plugs
Courtesy of GENERAL MOTORS CORP.
Install the oxygen sensor.
Tighten

Tighten the oxygen sensor to 42 N.m (31 ft lbs).
Connect the oxygen sensor electrical connector rosebud to the engine lift bracket.

Fig 8: Connecting Oxygen Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Connect the oxygen sensor electrical connector (3) to the wiring harness.

Fig 9: Connecting Oxygen Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Install the CPA lock.
Install the catalytic converter. Refer to Catalytic Converter Replacement (3.8L Engine) .
Lower the vehicle.