Exhaust Manifold Replacement LE5

1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
2. Remove the connector position assurance (CPA) retainer.
3. Disconnect the heated oxygen sensor (HO2S) electrical connector (2).




Important: The HO2S uses a permanently attached pigtail and connector. This pigtail should not be removed from the sensor. Damage or removal of the pigtail or connector will affect proper operation of the sensor.

4. Remove the HO2S (1). Refer to Heated Oxygen Sensor 1 Replacement .



5. Remove the exhaust manifold heat shield bolts.
6. Remove the heat shield.



7. Remove the catalytic converter to exhaust manifold nuts (1).



8. Remove and discard the exhaust manifold nuts.
9. Remove the exhaust manifold.
10. Remove and discard the exhaust manifold gasket.

1. Install a NEW exhaust manifold gasket onto the studs.
2. Install the exhaust manifold.
3. Install the NEW exhaust manifold nuts finger tight.

Notice: Refer to Fastener Notice in the Preface section.




4. Install the catalytic converter to exhaust manifold nuts (1).

Tighten
Tighten the bolts to 50 N·m (37 lb ft).




5. Tighten the exhaust manifold nuts in the sequence shown.

Tighten
Tighten the nuts to 14 N·m (10 lb ft).




6. Install the heat shield.
7. Install the exhaust manifold heat shield bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).




8. Install the HO2S (1). Refer to Heated Oxygen Sensor 1 Replacement .



9. Connect the HO2S electrical connector (2).
10. Install the CPA retainer.
11. Start the vehicle and inspect for leaks.
12. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .

Exhaust Manifold Replacement LNF

1. Remove the turbocharger. Refer to Turbocharger Replacement.
2. Remove the exhaust manifold heat shield bolts.
3. Remove the heat shield.



4. Remove and discard the exhaust manifold nuts.
5. Remove the exhaust manifold.
6. Remove and discard the exhaust manifold gasket.

1. Install a NEW exhaust manifold gasket onto the studs.
2. Install the exhaust manifold.
3. Install the NEW exhaust manifold nuts.

Notice: Refer to Fastener Notice in the Preface section.




4. Tighten the exhaust manifold nuts in the sequence shown.

Tighten
Tighten the nuts to 14 N·m (10 lb ft).




5. Install the heat shield.
6. Install the exhaust manifold heat shield bolts.

Tighten
Tighten the bolts to 25 N·m (18 lb ft).

7. Install the turbocharger. Refer to Turbocharger Replacement.