Exhaust Pipe Gasket: Service and Repair

Exhaust Seal Replacement

Removal Procedure





1. Raise and suitably support the vehicle.
2. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
1. Remove the clip from around the engine harness and the oxygen sensor pigtail.
2. Disconnect the connector position assurance (CPA) retainer.
3. Disconnect the forward oxygen sensor electrical connector.





3. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
1. Unclip the oxygen sensor electrical connector from the hose clip.
2. Disconnect the CPA retainer.
3. Disconnect the oxygen sensor electrical connector (1).





4. If equipped with a 6.0L or 8.1L engine, perform the following:
1. Disconnect the CPA retainer.
2. Disconnect the oxygen sensor electrical connector (1).

5. Support the catalytic converter or exhaust manifold pipe with adjustable jackstands.




6. If equipped with a 4.3L, 4.8L, or 5.3L engine, remove the left exhaust manifold pipe nuts.





7. If equipped with a 4.3L, 4.8L, or 5.3L engine, remove the right exhaust manifold pipe nuts.





8. If equipped with a 6.0L or 8.1L engine, remove the right exhaust manifold pipe nuts.





9. If equipped with a 6.0L or 8.1L engine, perform the following:
1. Remove the left exhaust manifold pipe nuts.
2. Remove the exhaust hanger mounting bracket bolts.

10. Lower the catalytic converter or exhaust manifold pipe using the adjustable jackstands.
11. Remove the exhaust manifold pipe seal(s).

Installation Procedure





1. Install the exhaust manifold pipe seal(s).
2. Raise the catalytic converter or exhaust manifold pipe using the adjustable jackstands.

3. If equipped with a 6.0L or 8.1L engine, perform the following:
1. Install the exhaust hanger mounting bracket bolts.
2. Install the left exhaust manifold pipe nuts.
^ Tighten the bolts to 12 Nm (106 inch lbs.).
^ Tighten the nuts to 50 Nm (39 ft. lbs.).

Notice: Refer to Fastener Notice in Service Precautions.






4. If equipped with a 6.0L or 8.1L engine, install the right exhaust manifold pipe nuts.
Tighten the nuts to 50 Nm (39 ft. lbs.).





5. If equipped with a 4.3L, 4.8L, or 5.3L engine, install the right exhaust manifold pipe nuts.





6. If equipped with a 4.3L, 4.8L, or 5.3L engine, install the left exhaust manifold pipe nuts.
Tighten the nuts to 50 Nm (39 ft. lbs.).





7. If equipped with a 6.0L or 8.1L engine, perform the following:
1. Connect the oxygen sensor electrical connector (1).
2. Connect the CPA retainer.

8. Remove the adjustable jackstands from catalytic converter or exhaust manifold pipe.





9. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
1. Connect the oxygen sensor electrical connector (1).
2. Connect the CPA retainer.
3. Clip the oxygen sensor electrical connector to the hose clip.





10. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
1. Connect the forward oxygen sensor electrical connector.
2. Connect the CPA retainer.
3. Install the clip around the engine harness and the oxygen sensor pigtail.

11. Lower the vehicle.