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Home >> Buick >> 2004 >> Century Base >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Exhaust Seal Replacement (3.1L) >> Removal Procedure

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
    2. Fig 1: Locating Exhaust Manifold Pipe Stud Nuts
    GM372621Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Catalytic Converter Movement Notice in Cautions and Notices.
    IMPORTANT: Use caution handling the pipe that contains an oxygen sensor. Do not cut the wire. For removal or repositioning disconnect the connector.
  2. Remove the exhaust manifold pipe stud nuts from the exhaust manifold studs.
    3. Fig 2: View Of Catalytic Converter Hangers
    GM289493Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Support the exhaust system where hangers are removed.
  3. Remove the catalytic converter exhaust hangers.
  4. Reposition the exhaust system.
    5. Fig 3: View Of Exhaust Manifold Pipe Gasket
    GM107855Courtesy of GENERAL MOTORS CORP.
  5. Remove the exhaust manifold pipe gasket.
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