Catalytic Converter: Service and Repair

Catalytic Converter Replacement (6.6L Engine)

Removal Procedure





1. Raise and suitably support the vehicle.
2. Support the transmission with a suitable transmission jack.
3. Remove the transmission mount to transmission support nuts.
4. Raise the transmission off of the transmission support.





5. Remove the transmission support crossmember bolts.
6. Remove the transmission support crossmember.





7. If equipped with the 6.6L engine, remove the exhaust muffler nuts.





8. If equipped with a 6.6L engine, loosen the exhaust pipe clamp.
9. Slide the exhaust pipe clamp up onto the exhaust pipe adapter.





10. If equipped with a 6.6L engine, remove the catalytic converter.
11. Slide the catalytic converter hanger out of the exhaust pipe hanger bracket.

Installation Procedure





1. If equipped with a 6.6L engine, install the catalytic converter.
2. Apply water based lubricant to the exhaust pipe hanger bracket, in order to aid in installation.
3. Slide the catalytic converter hanger into the exhaust pipe hanger bracket.





4. If equipped with the 6.6L engine, install the exhaust muffler nuts until snug.






5. Important: Ensure that the manifold pipe is square to the exhaust pipe adapter.

If equipped with a 6.6L engine, slide the exhaust pipe clamp down and around the pipe connection.

Notice: Refer to Fastener Notice in Service Precautions.

6. Tighten the exhaust pipe clamp and muffler nuts.
^ Tighten the clamp to 40 Nm (30 ft. lbs.).
^ Tighten the nuts to 40 Nm (30 ft. lbs.).





7. Lower the transmission onto the transmission support.
8. Install the transmission mount to transmission support nuts.
Tighten the bolts to 40 Nm (30 ft. lbs.).
9. Remove the support from the transmission.