Catalytic Converter Replacement (Gas, 8600 Lb and Above (GVWR))

REMOVAL PROCEDURE





1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Disconnect the oxygen sensor electrical connections.





3. Remove the nuts from the Y-pipe flat flange.





4. Remove the nuts, studs and flange seals from the Y-pipe and the exhaust manifold.





5. Remove the Y-pipe and the catalytic converter assembly.
6. Remove the muffler and the catalytic converter assembly.

INSTALLATION PROCEDURE

NOTICE: Refer to Fastener Notice in Service Precautions.





1. Install the flange seals, the studs and the nuts connecting the Y-pipe, catalytic converter assembly to the exhaust manifold.
^ Tighten the studs to 22 Nm (16 ft. lbs.).
^ Tighten the nuts to 64 Nm (47 ft. lbs.).





2. Install the muffler and the catalytic converter assembly.
3. Position the Y-pipe and the catalytic converter assembly to the flat flange.
4. Install the nuts to the flat flange studs.
^ Tighten the nuts to 64 Nm (47 ft. lbs.).





5. Connect the oxygen sensor electrical connections.
6. Check for clearance and alignment.
7. Lower the vehicle.