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Replacing catalytic converter


Clyde Epperson

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I take it you tried new O2 sensors, let the drive cycle complete, and nothing changed?

 

This is the basic procedure;

 

Catalytic Converter — LH

Removal and Installation

  1. NOTE: Always install new fasteners and gaskets. Clean flange faces prior to new gasket installation to make sure of correct sealing.

    With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .
  1. Disconnect the Catalyst Monitor Sensor (CMS) electrical connector.
  1. Remove the exhaust Y-pipe. For additional information, refer to Exhaust Y-Pipe in this section.
  1. Remove the 2 catalytic converter support bracket-to-transmission bolts.
    • To install, tighten to 48 Nm (35 lb-ft).
  1. Remove the 4 nuts and the LH catalytic converter.
    • Discard the nuts and gasket.
    • To install, tighten to 40 Nm (30 lb-ft).
  1. Inspect the exhaust manifold studs for damage.
    • If damaged, replace stud(s), or if stud comes out when removing nut(s), replace the stud(s).
    • To install, tighten to 25 Nm (18 lb-ft).
  1. To install, reverse the removal procedure.
    • Install a new gasket and nuts.
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