Exhaust Manifold Removal - Left Side (W/O 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 Oxygen Sensor

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

Fig 2: Identifying Left Exhaust Manifold

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Remove the exhaust manifold to exhaust intermediate pipe bolts (3).
Remove the exhaust manifold bolts (6).
Remove the exhaust manifold (2).

NOTE:

DO NOT reuse the exhaust manifold to exhaust intermediate pipe gasket.

Remove and discard the exhaust manifold to exhaust intermediate pipe gasket (5).

NOTE:

DO NOT reuse the exhaust manifold gasket.

Remove and discard the exhaust manifold gasket (1).

Fig 3: Identifying EGR Valve Inlet Pipe

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Remove the exhaust gas recirculation (EGR) valve inlet pipe bolt from the water crossover.

Fig 4: Identifying EGR Valve Inlet Pipe Nut

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Disconnect the EGR valve inlet pipe nut (1) from the fitting on the exhaust intermediate pipe.

Fig 5: Identifying EGR Valve Inlet Pipe

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Remove and discard the EGR valve inlet pipe.

Fig 6: Identifying Engine Rear Lift Bracket

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Remove the engine rear lift bracket bolts.
Remove the engine rear lift bracket.

Fig 7: View Of Exhaust Intermediate Pipe Bolts

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Remove the exhaust intermediate pipe bolts.

Fig 8: Identifying Exhaust Intermediate Pipe

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Remove the exhaust intermediate pipe.

Fig 9: Locating Left Side Coolant Heater

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