Oxidation Catalytic Converter (OC)

Oxidation Catalytic Converter (OC) - 6.4L Diesel

Removal

1. With the vehicle in NEUTRAL, position it on a hoist. For additional, refer to Vehicle Jacking and Lifting.

2. Remove the Diesel Particulate Filter (DPF) pressure sensor. For additional information, refer to Computers and Control Systems.

3. Disconnect the Exhaust Gas Temperature (EGT) sensor electrical connectors.

4. Remove the resonator and tail pipe assembly. For additional information, refer to Tailpipe - 6.4L Diesel Tailpipe.

5. Remove the 7 DPF-to-Oxidation Catalytic Converter (OC) nuts.
- Discard the nuts.

6. Disconnect the isolators and remove the DPF and, if equipped, the intermediate pipe as an assembly.
- Discard the DPF-to-OC gasket.

7. Support the OC.

8. Remove the OC-to-downpipe bolts.

9. Disconnect the OC isolators and remove the OC from the vehicle.

Installation

1. Position the OC in the vehicle and connect the isolators.

2. Install OC-to-downpipe bolts.
- Tighten to 40 Nm (30 lb-ft).

3. NOTE: Make sure the DPF-to-OC gasket surface is clean.

Install a new DPF-to-OC gasket.

4. Position the DPF and, if equipped, the intermediate pipe as an assembly into the vehicle and connect the isolators.

5. Install the 7 new OC-to-DPF nuts.
- Tighten to 40 Nm (30 lb-ft).

6. Install the resonator and tail pipe assembly into the vehicle. For additional information, refer to Tailpipe - 6.4L Diesel Tailpipe.

7. NOTICE: Make sure all 7 Oxidation Catalytic Converter (OC)-to-Diesel Particulate Filter (DPF) filter nuts have been installed before installing the DPF pressure sensor or damage to the DPF or DPF pressure sensor may occur.

Install the DPF pressure sensor. For additional information, refer to Computers and Control Systems.

8. Connect the EGT sensor electrical connectors.

9. NOTE: The exhaust system alignment procedure only needs to be carried out if the exhaust system isolators are not at zero load.

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. For additional information, refer to Exhaust System Alignment - 6.4L Diesel Service and Repair.