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Catalyst Replacement (General Motors Only)

  1. With converter removed from vehicle, remove fill plug by driving a small chisel between converter shell and fill plug. Continue to deform plug until it can be removed with pliers.
    CAUTION: Do no pry plug from opening as damage to plug sealing surface may result.
  2. Hold converter over a container, and by shaking it, remove catalyst beads.
  3. Raise front of converter to 45° and fill through opening with new catalyst beads. Light tapping on the converter side belt will facilitate bead installation.
  4. Install bridge into fill plug opening and thread bolt into bridge. Move bridge back and forth to loosen catalyst and position bridge.
  5. Remove bolt, and place washer and fill plug (with dished side out) in place. Install bolt and tighten to 28 ft. lbs.
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