Grand Prix V6-191 3.1L VIN M SFI (1998)
Exhaust Manifold: Service and Repair
Exhaust Manifold Replacement (Right Rear)
REMOVAL PROCEDURE
1. Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Starting and Charging.
2. Remove the throttle body air inlet duct. Refer to Air Cleaner Assembly Replacement in Powertrain Management.
3. Drain the engine coolant from the cooling system. Refer to Draining and Filling Cooling System in Cooling System.
4. Disconnect the radiator inlet hose at the engine. Refer to Radiator Hose Replacement - Inlet in Cooling System.
5. Remove the automatic transaxle vacuum modulator pipe. Refer to Vacuum Modulator Pipe Replacement in Automatic Transmission/Transaxle.
6. Remove the thermostat bypass pipe. Refer to Thermostat Bypass Pipes Replacement in Thermostat, Cooling System.
7. Remove the exhaust crossover pipe heat shield. Refer to Exhaust Crossover Replacement.
8. Remove the exhaust crossover pipe bolts to the right (rear) exhaust manifold. Refer to Exhaust Crossover Replacement.
9. Disconnect the Heated Oxygen Sensor (H02S) wiring harness connector. Refer to H02S Replacement (H02S1) in Powertrain Management.
10. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
11. Disconnect the three-way catalytic converter pipe from the right (rear) exhaust manifold. Refer to Catalytic Converter Replacement in Powertrain
Management.
12. Remove the Exhaust Gas Recirculation (EGR) tube from the rear exhaust manifold. Refer to EGR Valve Replacement in Powertrain Management.
13. Remove the right (rear) exhaust manifold upper heat shield bolts.
14. Remove the right (rear) exhaust manifold upper heat shield.
