Catalytic Converter: Service and Repair
Catalytic ConverterExhaust System - Exploded View, Dual Exhaust (Part 1):
Exhaust System - Exploded View, Dual Exhaust (Part 2):
Removal and Installation
1. NOTE: RH shown, LH similar.
With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Maintenance/Service and Repair.
2. WARNING: Shut off the electrical power to the air suspension system prior to hoisting or jacking an air suspension equipped vehicle. Failure to do so may result in unexpected inflation or deflation of the air springs, which may result in shifting of the vehicle during these operations. Failure to follow this instruction may result in serious personal injury.
If equipped, turn the air suspension switch OFF.
3. Disconnect the heated oxygen sensor (HO2S) and catalyst monitor sensor electrical connector.
4. NOTE: To correctly seat the converter, alternately tighten the exhaust manifold-to-catalytic converter nuts to specification.
Remove and discard the 2 catalytic converter-to-exhaust manifold nuts.
^ To install, tighten to 40 Nm (30 lb-ft).
5. NOTE: Alternately tighten the catalytic converter-to-exhaust inlet pipe bolts to specification to draw the flanges together evenly.
Remove the catalytic converter-to-exhaust inlet pipe bolts, the flagnuts and the damper, then remove the catalytic converter.
^ Discard the bolts, the flagnuts and the gasket.
^ To install, tighten to 40 Nm (30 lb-ft).
6. Remove and discard the 2 catalytic converter-to-exhaust manifold studs.
^ To install, tighten to 40 Nm (30 lb-ft).
7. NOTE: Clean the mating surfaces of the exhaust manifold, the outlet pipe and the catalytic converter.
NOTE: Always install new exhaust system fasteners and gaskets. Do not tighten the fasteners until all components are assembled. Make sure to tighten all fasteners beginning at the rear of the vehicle.
To install, reverse the removal procedure.