Catalytic Converter: Service and Repair
REMOVAL1. Remove the muffler and tail pipe assembly.
2. Disconnect the two Heated Oxygen Sensors (H02S) and the two Catalyst Monitor Sensor (CMSs) connectors.
3. Remove the nuts.
4. Remove the transfer case skid plate.
1 Remove the four bolts.
2 Remove the transfer case skid plate.
5. Remove the bolt.
6. Use High-Lift Jack to support the transmission.
7. Remove the transmission support crossmember to transmission support insulator nuts.
8. Remove the transmission support crossmember.
1 Remove the three LH bolts and the three RH bolts.
2 Remove the transmission support crossmember.
9. Remove the exhaust hanger nut.
10. Remove the two three-way catalytic converters.
11. If only one TWC is being replaced, remove clamp.
12. Separate the LH and RH three-way catalytic converters.
NOTE: It may be necessary to heat the LH/RH three-way catalytic converter joint to ease removal.
13. Separate the LH and RH three-way catalytic converters.
NOTE: It may be necessary to heat the LH/RH three-way catalytic converter joint to ease removal.
INSTALLATION
1. Insert the LH three-way catalytic converter into the RH three-way catalytic converter.
2. Position the RH and LH three-way catalytic converters and install the four nuts.
3. Install the pipe clamp and the two nuts.
3. Install the exhaust hanger nut.
4. Install the transmission support crossmember.
1 Position the transmission support crossmember.
2 Install the three LH bolts and the three RH bolts.
5. Install the transmission support crossmember to transmission support insulator nuts.
6. Install the bolt.
7. Remove High-Lift Jack.
8. Connect the two heated oxygen sensor and the two catalyst monitor sensor electrical connectors.
9. Install the transfer case skid plate.
1 Position the transfer case skid plate.
2 Install the four bolts (two each side).
10. Install the muffler and tailpipe assembly.