Exhaust Manifold: Service and Repair

Removal Procedure

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot Service the system when it is cool.

Important: California emissions vehicles are equipped with an additional catalytic converter (PUP catalytic converter) and a different exhaust manifold from federal emissions vehicles.





1. Perform the following if the vehicle is equipped with the PUP catalytic converter:
1.1. Remove the 3 bolts and 2 nuts and remove the exhaust manifold heat shield from the exhaust manifold.
1.2. Remove the 3 nuts and separate the front pipe/catalytic converter assembly from the exhaust manifold.
1.3. Remove the engine mount-to-front pipe/catalytic converter assembly bracket.
1.4. Remove the exhaust manifold-to-engine block bracket.





2. Perform the following if the vehicle is not equipped with the PUP catalytic converter:
2.1. Remove the 4 bolts and 1 nut and the exhaust manifold heat shield.
2.2. Raise the vehicle. Refer to Vehicle Lifting.
2.3. Remove the two bolts and separate the front pipe assembly from the exhaust manifold.
2.4. Lower the vehicle.
2.5. Remove the exhaust manifold-to-engine block bracket.

3. Disconnect the oxygen sensor electrical connector.
4. Remove the oxygen sensor from the exhaust manifold.
5. Remove the 1 bolt and 8 nuts from the exhaust manifold.
6. Remove the exhaust manifold, the engine lift hook, and the gasket from the cylinder head.

Installation Procedure





1. Perform the following if the vehicle is equipped with the PUP catalytic converter:
1.1. Install the new exhaust manifold gasket to the cylinder head.

Notice: Refer to Fastener Notice in Service Precautions.

1.2. Install the exhaust manifold and the engine lift hook to the cylinder head. Secure the exhaust manifold with the 8 nuts and 1 bolt.
Tighten the 8 nuts and 1 bolt to 50 Nm (37 ft. lbs.).
1.3. Connect the lower exhaust pipe to the exhaust manifold with a new gasket. Secure with the 3 nuts.
Tighten the 3 nuts to 50 Nm (37 ft. lbs.).
1.4. Install the exhaust manifold heat shield to the exhaust manifold. Secure the exhaust manifold heat shield with 3 bolts and 2 nuts.





2. Perform the following if the vehicle is not equipped with the PUP catalytic converter:
2.1. Install the new exhaust manifold gasket to the cylinder head.

Notice: Refer to Fastener Notice in Service Precautions.

2.2. Install the exhaust manifold and the engine lift hook to the cylinder head. Secure the exhaust manifold with the 1 bolt and the 8 nuts.
Tighten the 8 nuts and 1 bolt to 50 Nm (37 ft. lbs.). Raise the vehicle.
2.4. Install the front pipe assembly to the exhaust manifold with a new seal. Secure the assembly with the two bolts.
Tighten the exhaust manifold-to-front pipe assembly bolts to 50 Nm (37 ft. lbs.).
2.5. Lower the vehicle.
2.6. Install the exhaust manifold-to-engine block bracket. Install the exhaust manifold heat shield to the exhaust manifold. Secure the exhaust manifold heat shield with 4 bolts and 1 nut.

3. Apply anti-seize compound to the threads of the oxygen sensor.
4. Install the oxygen sensor.
^ Tighten the oxygen sensor to 45 Nm (33 ft. lbs.).
5. Connect the oxygen sensor electrical connector.
6. Inspect the exhaust system for exhaust gas leakage.