GM Service Manual Online
For 1990-2009 cars only

Exhaust Seal Replacement 3.8L

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Caution: Refer to Catalytic Converter Movement Caution in the Preface section.


    Object Number: 372626  Size: SH

    Note: Exercise caution handling the pipe that contains an oxygen sensor. Do not cut the wire. For removal or repositioning disconnect the connector.

  3. Remove the exhaust manifold nuts from the exhaust manifold pipe studs.

  4. Object Number: 289493  Size: SH

    Note: Support the exhaust system where hangers are removed.

  5. Remove the catalytic converter exhaust hangers.
  6. Reposition the exhaust system.
  7. Remove the exhaust manifold pipe gasket.

Installation Procedure


    Object Number: 372626  Size: SH
  1. Install the exhaust manifold pipe gasket.
  2. Install the exhaust system to the original position

  3. Object Number: 289493  Size: SH
  4. Install the catalytic converter exhaust hangers.
  5. Remove the support from the exhaust system.
  6. Caution: Refer to Fastener Caution in the Preface section.

  7. Install the exhaust manifold pipe nuts to the exhaust manifold pipe studs.
  8. Tighten
    Tighten the nuts to 35 N·m (26 lb ft).

  9. Inspect the exhaust system for leaks and underbody contact.
  10. Lower the vehicle.