Exhaust Manifold Removal - Right (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.

CAUTION: The stud must be reinstalled in the original location. The stud may remain attached to the nut when initially removed during exhaust manifold removal. In order to prevent exhaust leakage between the exhaust manifold and cylinder head the nut and stud combination must be reinstalled during exhaust manifold installation in the original location.
Remove the right exhaust manifold retaining nuts (3).
Important: DO NOT reuse the exhaust manifold gasket.
Remove the exhaust manifold and the gasket (1).

Fig 2: Removing Right Exhaust Manifold & Gasket
Courtesy of GENERAL MOTORS CORP.
If equipped, remove the right coolant heater (1) as follows:
1. 4.1. Remove the coolant heater retaining bolt.
2. 4.2. Remove coolant heater from the cylinder block.
Fig 3: Removing Right Coolant Heater
Courtesy of GENERAL MOTORS CORP.

Disconnect the vacuum harness from the A.I.R. valve and vacuum solenoid valve.

Fig 1: Disconnect A.I.R. Valve Vacuum Harness
Courtesy of GENERAL MOTORS CORP.
Disconnect the vacuum harness from the water crossover vacuum port.
Remove the A.I.R. vacuum harness.

Fig 2: Removing A.I.R. Vacuum Harness
Courtesy of GENERAL MOTORS CORP.
Remove the A.I.R. valve pipe nuts from the exhaust manifold.
Remove the A.I.R. valve bolts from the mounting bracket.
Remove the A.I.R. valve.
Important: DO NOT reuse the A.I.R. valve pipe gasket.
Remove and discard the A.I.R. valve pipe gasket.

Fig 3: Removing A.I.R. Valve Pipe & Gasket
Courtesy of GENERAL MOTORS CORP.
Remove the oxygen sensor (1) and inspect the sensor for excessive deposits or damage. Replace the oxygen sensor if necessary.

Fig 4: Removing Oxygen Sensor
Courtesy of GENERAL MOTORS CORP.

CAUTION: The stud must be reinstalled in the original location. The stud may remain attached to the nut when initially removed during exhaust manifold removal. In order to prevent exhaust leakage between the exhaust manifold and cylinder head the nut and stud combination must be reinstalled during exhaust manifold installation in the original location.
Remove the right exhaust manifold retaining nuts (3).
Important: DO NOT reuse the exhaust manifold gasket.
Remove the exhaust manifold and the gasket (1).

Fig 5: Removing Right Exhaust Manifold & Gasket
Courtesy of GENERAL MOTORS CORP.
If equipped, remove the right coolant heater (1) as follows:
1. 11.1. Remove the coolant heater retaining bolt.
2. 11.2. Remove coolant heater from the cylinder block.
Fig 6: Removing Right Coolant Heater
Courtesy of GENERAL MOTORS CORP.