Exhaust Pipe: Service and Repair
Exhaust Y-Pipe - 3.0L, 4.0LRemoval
CAUTION: Do not use oil or grease-based lubricants on the isolators. These lubricants may cause deterioration of the rubber. This can lead to separation of the isolator from the exhaust hanger bracket during vehicle operation.
1. With the vehicle in NEUTRAL, position it on a hoist.
2. Disconnect the heated oxygen sensor (HO2S) and catalyst monitor sensor electrical connectors.
3. Remove the RH side of the exhaust Y-pipe assembly-to-muffler and tailpipe assembly bolts, flagnuts and gasket.
^ Discard the flagnuts and gasket.
4. Remove the transmission mount and isolator-to-transmission bolt.
5. Remove the LH side of the exhaust Y-pipe-to-RH side of the exhaust Y-pipe nuts.
^ Discard the nuts.
6. Using a suitable jack, support the RH side of the exhaust Y-pipe.
7. NOTE: 3.0L shown, 4.0L similar.
NOTE: Do not remove the RH side of the exhaust Y-pipe-to-exhaust manifold nuts.
Loosen the RH side of the exhaust Y-pipe-to-exhaust manifold nuts.
8. Using a suitable jack, support the LH side of the exhaust Y-pipe.
9. NOTE: 3.0L shown, 4.0L similar.
Remove the LH side of the exhaust Y-pipe-to-exhaust manifold nuts.
^ Discard the nuts.
10. Remove the LH side of the exhaust Y-pipe.
11. Remove the LH side of the exhaust Y-pipe-to-RH side of the exhaust Y-pipe gasket.
^ Discard the gasket.
12. NOTE: 3.0L shown, 4.0L similar.
Remove the RH side of the exhaust Y-pipe-to-exhaust manifold nuts and remove the RH side of the exhaust Y-pipe.
^ Discard the nuts.
Installation
CAUTION: Do not use oil or grease-based lubricants on the isolators. These lubricants may cause deterioration of the rubber. This can lead to separation of the isolator from the exhaust hanger bracket during vehicle operation.
NOTE: Clean all the mating surface of the exhaust Y-pipe.
1. NOTE: 3.0L shown, 4.0L similar.
Position the RH side of the exhaust Y-pipe into the vehicle and loosely install the new RH side of the exhaust Y-pipe-to-exhaust manifold nuts.
2. Install a new LH side of the exhaust Y-pipe-to-RH side of the exhaust Y-pipe gasket.
3. NOTE: 3.0L shown, 4.0L similar.
Position the LH side of the exhaust Y-pipe into the vehicle and loosely install the new LH side of the exhaust Y-pipe-to-exhaust manifold nuts.
4. Loosely install the new LH side of the exhaust Y-pipe-to-RH side of the exhaust Y-pipe nuts.
5. Install the transmission mount and isolator-to-transmission bolt.
^ Tighten to 90 Nm (66 lb-ft).
6. Install a new RH side of the exhaust Y-pipe-to-muffler and tailpipe assembly gasket.
7. Loosely install the RH side of the exhaust Y-pipe-to-muffler and tailpipe assembly bolts and new flagnuts.
8. NOTE: RH side shown, LH side similar.
NOTE: 3.0L shown, 4.0L similar.
Tighten the exhaust Y-pipe assembly-to-exhaust manifold nuts.
^ Tighten to 40 Nm (30 lb-ft).
9. Tighten the LH side of the exhaust Y-pipe-to-RH side of exhaust Y-pipe nuts.
^ Tighten to 40 Nm (30 lb-ft).
10. Tighten the RH side of the exhaust Y-pipe-to-muffler and tailpipe assembly bolts.
^ Tighten to 40 Nm (30 lb-ft).
11. Connect the HO2S and catalyst monitor sensors electrical connectors.
12. Check to see if the exhaust system isolators are at zero load. If the exhaust system isolators are not at zero load, carry out the exhaust system alignment procedure.