Exhaust Manifold (Unit Repair): Installation

1. Install new exhaust manifold studs.

   Torque: 

   Exhaust Manifold Studs-to-Cylinder Head: 10 N.m (89 in-lbs) 

   Fig 1: Installing New Exhaust Manifold Studs

   Courtesy of GENERAL MOTORS CORP.
2. Install new exhaust manifold gasket.
3. Install exhaust manifold to cylinder head.
4. Install exhaust manifold to cylinder head retaining nuts. Tighten nuts starting from the center and working outward.

   Torque: 

   Exhaust Manifold-to-Cylinder Head Nuts: 12 N.m (9 ft-lbs) 

   Fig 2: Installing New Exhaust Manifold Gasket And Exhaust Manifold

   Courtesy of GENERAL MOTORS CORP.
5. Coat the threads of oxygen sensor with antisieze compound (P/N 12397953).
6. Install oxygen sensor.

   Torque: 

   Oxygen Sensor Bolts: 30 N.m (22 ft-lbs) 

   Fig 3: Installing Oxygen Sensor

   Courtesy of GENERAL MOTORS CORP.
7. Install exhaust manifold heat shield.
8. Install exhaust manifold heat shield bolts.

Torque: 

Exhaust Manifold Heat Shield Bolts: 25 N.m (18 ft-lbs) 

Fig 4: Installing Exhaust Manifold Heat Shield And Bolts

Courtesy of GENERAL MOTORS CORP.