Exhaust Manifold Removal - Right Side (With RPO NC1 or NF7)

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Secondary Air Injection Valve Pipe Nuts

Courtesy of GENERAL MOTORS COMPANY

Remove the secondary air injection (AIR) valve pipe nuts from the exhaust manifold.
Remove the AIR valve bolts from the mounting bracket.
Remove the AIR valve.

NOTE:

DO NOT reuse the AIR valve pipe gasket.

Remove and discard the AIR valve pipe gasket.

Fig 2: View of Oxygen Sensor

Courtesy of GENERAL MOTORS COMPANY

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

Fig 3: Identifying Right Exhaust Manifold Retaining Nuts

Courtesy of GENERAL MOTORS COMPANY

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).

NOTE:

DO NOT reuse the exhaust manifold gasket.

Remove the exhaust manifold and the gasket (1).

Fig 4: Identifying Right Coolant Heater

Courtesy of GENERAL MOTORS COMPANY

If equipped, remove the right coolant heater (1) as follows:
1. Remove the coolant heater retaining bolt.
2. Remove coolant heater from the cylinder block.