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Home >> Chevrolet >> 2020 >> Impala Premier >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System >> Repair Instructions >> Catalytic Converter Replacement >> Installation Procedure

Installation Procedure

  1. GM2809793

    Install the catalytic converter (3) to the exhaust manifold with a NEW catalytic converter seal (2).

  2. Hand tighten the catalytic converter to exhaust manifold fasteners (1).
  3. GM2809794
    CAUTION:

    Refer to Fastener Caution .

    Install the catalytic converter brace fasteners (1) and tighten to 22 N.m (16 lb ft).

  4. GM2809793

    Tighten the catalytic converter fasteners (1) to 58 N.m (43 lb ft).

  5. Install the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement .
  6. GM2809488
    NOTE:

    Do not twist or damage the flex coupling on the exhaust front pipe.

    Install the exhaust front pipe (1) to the catalytic converter (3) with a NEW gasket (2).

  7. GM2809491

    Install the lower catalytic converter fasteners (1) and tighten to 28 N.m (21 lb ft).

  8. Install the exhaust front pipe retainer fastener (2) and tighten to 22 N.m (16 lb ft).
  9. Start the engine and check for exhaust leaks.