Catalytic Converter Replacement (6.6L (LBZ/LLY))

Catalytic Converter Replacement (6.6L (LBZ/LLY))

Removal Procedure




1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
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. Remove the catalytic converter to muffler nuts (3).




8. Loosen the exhaust pipe clamp.
9. Slide the exhaust pipe clamp up onto the exhaust pipe adapter.




10. Slide the catalytic converter hanger out of the exhaust pipe hanger bracket and remove the catalytic converter.

Installation Procedure




1. 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. Install the catalytic converter to muffler nuts (3) until snug.





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

5. Slide the exhaust pipe clamp down and around the pipe connection.

Notice: Refer to Fastener Notice.

6. Tighten the exhaust pipe clamp and catalytic converter nuts.

* Tighten the clamp to 40 N.m (30 lb ft).
* Tighten the nuts to 40 N.m (30 lb ft).




7. Lower the transmission onto the transmission support.
8. Install the transmission mount to transmission support nuts.

Tighten the bolts to 40 N.m (30 lb ft).

9. Remove the support from the transmission.
10. Lower the vehicle.