Exhaust Manifold Replacement - Right

Removal Procedure





1. Remove the rear oxygen sensors at the back edge of the right cam cover and the rear pipe. Refer to H02S Replacement in Powertrain Management.
2. Disconnect the harness clip.
3. Raise the vehicle on the hoist. Refer to Vehicle Lifting.
4. Remove the exhaust manifold rear pipe (2) from the front of the catalytic converter.
5. Remove the suspension position sensor at the lower control arm from both sides.
6. Remove or disconnect the intermediate shaft, as necessary, from the steering gear.
7. Support the rear cross member of the engine cradle with a tall screw jack.
8. Remove the four cradle-to-body bolts.
9. Lower the rear of the engine cradle.
10. Remove the four bolts securing the Exhaust Manifold Rear Pipe to the exhaust manifold and crossover exhaust pipe.





11. Remove the right side cylinder head to the transaxle brace.





12. Remove the exhaust manifold nuts. Some nuts may require removal with an open end wrench or universal coupling tools.
13. Remove the manifold and the gasket. Discard the gasket.
14. Remove the oxygen sensor.

Installation Procedure





1. Coat the oxygen sensor threads with high temperature anti-seize, GM P/N 5613695 or equivalent.

Notice: Refer to Fastener Notice in Service Precautions.

2. Install the oxygen sensor.

- Tighten the sensor to 40 Nm (30 ft. lbs.).

3. Install the manifold gasket over the cylinder head studs.
4. Install the manifold and the nuts.

- Tighten the nuts to 25 Nm (18 ft. lbs.).





5. Install the right side cylinder head to the transaxle brace.

- Tighten the bolt and nut to 50 Nm (37 ft. lbs.).





6. Install the exhaust manifold rear pipe (2) and secure with four bolts. New bolts are recommended for maximum joint integrity,

- Tighten the M8 bolts to 25 Nm (18 ft. lbs.).
- Tighten the M10 bolts to 40 Nm (30 ft. lbs.).

7. Raise the engine cradle into position.

- Tighten the four bolts to 100 Nm (74 ft. lbs.).

8. Connect the intermediate shaft to the steering gear.

- Tighten the bolt to 50 Nm (37 ft. lbs.).

Important: When correctly aligned the flanges for the converter and the exhaust manifold rear pipe are parallel. If this condition does not exist, realign the Exhaust Manifold Rear Pipe by loosening the exhaust manifold bolts and repositioning the exhaust manifold rear pipe.

9. Connect the exhaust manifold rear pipe to the catalytic converter with four nuts.

- Tighten the nuts to 25 Nm (18 ft. lbs.).

10. Connect the suspension position sensors to the lower control arms.
11. Lower the vehicle.
12. Connect the oxygen sensor.
13. Install the harness retainer.