GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 LeSabre 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Exhaust Manifold Installation - Left Side

    Object Number: 683917 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the exhaust manifold studs.

    2. Tighten
    Tighten the exhaust manifold studs to 10 N·m (89 lb in).


    Object Number: 683911 Size: SH
  2. Install the exhaust manifold gasket.
  3. Install the exhaust manifold.
  4. Install the exhaust manifold bolts and nuts.

    5. Tighten
    Tighten the exhaust manifold bolts and nuts to 30 N·m (22 lb ft).

  5. Install the left side spark plugs.

    6. Tighten
    Tighten the spark plugs to 15 N·m (11 lb ft).


    Object Number: 154527 Size: SH
  6. Install the left engine lift hook.
  7. Install the left engine lift hook nut and bolt.

    8. Tighten
    Tighten the left engine lift hook nut and bolt to 30 N·m (22 lb ft).