GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Express - AWD 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Exhaust Manifold Cleaning and Inspection

    Object Number: 663760 Size: SH
  1. Clean the exhaust manifold.
  2. Clean the exhaust manifold mating surfaces.
  3. Inspect the exhaust manifold for cracks.
  4. Inspect the exhaust manifold mating surfaces for damage.
  5. Replace the exhaust manifold if any damage is found.

    6. Object Number: 663761 Size: SH
  6. Measure the exhaust manifold flange for warpage with feeler gauge and a straightedge. Replace the exhaust manifold if the warpage is more than 0.3 mm (0.0118 in).
  7. Install the exhaust manifold heat shield.

    8. Caution: Refer to Fastener Caution in the Preface section.

  8. Install the exhaust manifold heat shield bolts and tighten to 8 N·m (71 lb in).