Exhaust Manifold Removal. Cadillac Concours 1997

For 1990-2009 cars

## Exhaust Manifold Removal Right

1. Remove the oxygen sensor (1) and inspect the sensor for excessive deposits or damage. Replace the oxygen sensor if necessary.

Important: In some cases, the stud will remain attached to the nut during removal. If this happens, you must install the nut/stud combination in its ORIGINAL location or an exhaust leak could occur.

2. Remove the right exhaust manifold retaining nuts (3).

Important: DO NOT reuse the exhaust manifold gasket.

3. Remove the exhaust manifold and the gasket (1).
4. If equipped, remove the right coolant heater (1) as follows:

4.1. | Remove the coolant heater retaining bolt.

4.2. | Remove coolant heater from the cylinder block.

## Exhaust Manifold Removal Left

1. Remove the oxygen sensor (1) and inspect the sensor for excessive deposits or damage. Replace the oxygen sensor if necessary.
2. Remove the exhaust manifold to crossover pipe retaining bolts (3).
3. Remove and discard the exhaust manifold to crossover pipe gasket (5).

Important: DO NOT reuse the exhaust manifold to crossover pipe gasket.

4. Remove the exhaust manifold retaining bolts (6).
5. Remove the exhaust manifold (2).
6. Remove and discard the exhaust manfiold gasket (1).

Important: DO NOT reuse the exhaust manifold gasket.

7. If equipped, remove the left coolant heater (1) as follows:

7.1. | Remove the coolant heater retaining bolt.

7.2. | Remove the coolant heater from the cylinder block.

8. Remove the oil level indicator tube retaining bolt.
9. Remove the oil level indicator tube.
10. Disconnect the EGR feed tube nut (1) from the exhaust crossover.
11. Remove the EGR feed pipe retaining bolt (2) and flange (3) from the water crossover.
12. Remove the EGR feed tube.
13. Remove the exhaust crossover retaining stud (3) and bolt (1).
14. Remove the exhaust crossover (2).