Exhaust Manifold Replacement - Right Side

Exhaust Manifold Replacement - Right Side (LNJ) (3.4L)

Removal Procedure

1. Disconnect the oxygen sensor electrical connector.
2. Remove the 3 nuts attaching exhaust crossover pipe to the right exhaust manifold. Refer to Exhaust Crossover Pipe Replacement (LNJ) (Service and Repair).
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).




4. Remove the nuts (3) securing the catalytic converter (4) to the exhaust manifold and position catalytic converter out of the way. Refer to Catalytic Converter Replacement (Service and Repair).




5. Remove the exhaust manifold heat shield bolts (3).
6. Remove the exhaust manifold heat shields (1, 2).




7. Remove the exhaust manifold nuts (3).
8. Remove the exhaust manifold (2).
9. Remove the exhaust manifold gasket (1).
10. If you are REPLACING the engine right side exhaust manifold, remove the heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement - Sensor 1 (Service and Repair).




11. If necessary, remove the exhaust manifold studs.
12. Clean the exhaust manifold and the cylinder head exhaust manifold sealing surfaces.

Installation Procedure





Caution: Refer to Fastener Caution (Fastener Caution).

1. If previously removed, install the exhaust manifold studs and tighten to 18 Nm (13 lb ft).
2. If removed, install the HO2S. Refer to Heated Oxygen Sensor Replacement - Sensor 1 (Service and Repair).




3. Install the exhaust manifold gasket (1).
4. Install the exhaust manifold (2).
5. Install the exhaust manifold nuts (3) and tighten to 16 Nm (12 lb ft).




6. Install the exhaust manifold upper heat shield (1).
7. Install the exhaust manifold lower heat shield (2).
8. Install the exhaust manifold heat shield bolts (3) and tighten to 10 Nm (89 lb in).




9. Install the catalytic converter (4) to the exhaust manifold and install the nuts (3). Refer to Catalytic Converter Replacement (Service and Repair).
10. Lower the vehicle.
11. Install the exhaust crossover pipe nuts to the right side exhaust manifold. Refer to Exhaust Crossover Pipe Replacement (LNJ) (Service and Repair).
12. Connect the HO2S electrical connector.