Muffler: Service and Repair

Muffler Replacement

^ Tools Required
- J 38185 Hose Clamp Pliers

Removal Procedure
1. Deflate the rear suspension air bags, if equipped.
2. Raise the vehicle. Refer to Vehicle Lifting.





3. Remove the exhaust muffler to catalytic converter flange nuts.
4. Loosen the exhaust pipe clamp.
5. Support the rear axle with jack stands.
6. Remove the right side lower stabilizer nut and position link aside.
7. Remove the rear track bar right hand nut and bolt.
8. Remove the right hand rear shock lower bolt and nut.
9. Disconnect the right hand air suspension level sensor, if equipped.
10. Lower the axle.





11. Remove the insulators from the frame hangers.
12. With the aid of an assistant, slide the muffler rearward in order to remove the muffler from the catalytic converter.
13. Remove the insulators from the muffler hangers.
14. Remove the muffler from the vehicle.

Installation Procedure





Important: Apply lubricant to the insulators to aid in installation.

1. Install the insulators to the muffler hangers.
2. With the aid of an assistant, slide the muffler forward in order to install the muffler to the catalytic converter.
3. Install the insulators to the frame hangers.





4. Install the exhaust muffler nuts, until snug.

Notice: Refer to Fastener Notice in Service Precautions.

5. Tighten the exhaust pipe clamp bolt and muffler nuts.
^ Tighten the exhaust muffler nuts to 40 Nm (30 ft. lbs.).
^ Tighten the exhaust pipe clamp to 44 Nm (33 ft. lbs.).

6. Raise the rear suspension to ride height.
7. Connect the right hand air suspension level sensor, if equipped.
8. Install the right hand shock lower bolt and nut.
^ Tighten the bolt and nut to 105 Nm (77 ft. lbs.).
9. Install the rear track bar bolt and nut.
^ Tighten the bolt and nut to 105 Nm (77 ft. lbs.).
10. Install the right hand lower stabilizer nut.
^ Tighten the nut to 72 Nm (53 ft. lbs.).
11. Remove the jack stands from under the rear axle.
12. Lower the vehicle. Ensure the air springs seat properly as the vehicle is being lowered.
13. If equipped with air suspension, start the engine and idle for 2 minutes to ensure the air spring leveling system is functioning properly.