Exhaust Manifold Replacement. Cadillac Concours 1997

For 1990-2009 cars

## Exhaust Manifold Replacement Rear Y-Pipe

### Removal Procedure

1. Remove the torque struts.
2. Raise the vehicle.
3. Remove the pinch bolt from the steering racket. Refer to Power Steering Gear and Pump.
4. Remove the level control. Refer to Electronic Level Control.
5. Remove the four nuts from the converter flange.
6. Lower the frame.

Notice: Lower the frame approximately 1 inch. Lowering the cradle too far may cause damage to the engine electrical connections and wiring.

7. Remove the four 15 mm bolts from the catalytic converter.
8. Remove the two 15 mm bolts from the exhaust manifold.
9. Remove the two 10 mm bolts from the crossover pipe.
10. Remove the exhaust manifold rear pipe from the vehicle.

### Installation Procedure

1. Install the two 15 mm bolts from the exhaust manifold.

Tighten
Tighten the exhaust manifold flange bolts to 40 N·m (30 lb ft).

Notice: 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.

2. Install the two 10 mm bolts from the crossover pipe.

Tighten
Tighten the crossover pipe bolts to 40 N·m (30 lb ft).

3. Raise the engine frame.

Tighten
Tighten the cradle bolts to 192 N·m (142 lb ft).

4. Install the converter seal.
5. Install the converter nuts.

Tighten
Tighten the converter nuts to 24 N·m (18 lb ft).

6. Install the level control. Refer to Electronic Level Control.
7. Install the pinch bolt. Refer to Power Steering Gear And Pump.
8. Lower the vehicle.
9. Install the torque struts.