Exhaust Manifold Removal - Left (W/O RPO, NC1 or NF7)

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Removing Oxygen Sensor
Courtesy of GENERAL MOTORS CORP.
Remove the exhaust manifold to crossover pipe bolts (3).
Remove the exhaust manifold bolts (6).
Remove the exhaust manifold (2).
Important: DO NOT reuse the exhaust manifold to crossover pipe gasket.
Remove and discard the exhaust manifold to crossover pipe gasket (5).
Important: DO NOT reuse the exhaust manifold gasket.
Remove and discard the exhaust manifold gasket (1).

Fig 2: Removing Exhaust Manifold & Gasket
Courtesy of GENERAL MOTORS CORP.
Disconnect the EGR inlet tube nut (1) from the exhaust crossover.
Important: The EGR valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.
Remove the EGR inlet pipe bolt (2) and flange (3) from the water crossover.
Remove the EGR inlet tube and discard.

Fig 3: Removing EGR Inlet Tube
Courtesy of GENERAL MOTORS CORP.
Remove the exhaust crossover stud (3) and bolt (1).
Remove the exhaust crossover (2).

Fig 4: Removing Exhaust Crossover
Courtesy of GENERAL MOTORS CORP.
If equipped, remove the left coolant heater (1) as follows:
1. 12.1. Remove the coolant heater bolt.
2. 12.2. Remove the coolant heater from the cylinder block.
Fig 5: Removing Left Coolant Heater
Courtesy of GENERAL MOTORS CORP.