GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Corvette 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Exhaust Manifold Cleaning and Inspection

Exhaust Manifold Cleaning and Inspection 7.0L


    Object Number: 1552472 Size: SH

    Important: Do not use the exhaust manifold-to-cylinder head gaskets again. Upon installation of the exhaust manifold, install a NEW gasket. An improperly installed gasket or leaking exhaust system may effect on-board diagnostics (OBD) II system performance.

  1. Clean the exhaust manifold (600) and heat shield (603) in solvent.

    2. Caution: Refer to Safety Glasses Caution in the Preface section.

  2. Dry the exhaust manifold with compressed air.
  3. Inspect the exhaust manifold-to-cylinder head gasket surface for excessive scratches or gouging.
  4. Inspect for a loose, damaged, or cracked heat shield (603).
  5. Inspect the exhaust pipe studs (605) for damaged threads.

    6. Object Number: 66607 Size: SH
  6. Use a straight edge and a feeler gage to measure the exhaust manifold cylinder head deck for warpage.

    7. An exhaust manifold deck with warpage in excess of 0.25 mm (0.01 in) within the 2 front or 2 rear runners or 0.5 mm (0.02 in) overall, may cause an exhaust leak and may effect OBD II system performance. Exhaust manifolds not within specifications must be replaced.

Exhaust Manifold Cleaning and Inspection 6.2L


    Object Number: 1408850 Size: SH

    Important: Do not use the exhaust manifold-to-cylinder head gaskets again. Upon installation of the exhaust manifold, install a NEW gasket. An improperly installed gasket or leaking exhaust system may effect on-board diagnostics (OBD) II system performance.

  1. Clean the exhaust manifold (600) and heat shield (603) in solvent.

    2. Caution: Refer to Safety Glasses Caution in the Preface section.

  2. Dry the exhaust manifold with compressed air.
  3. Inspect the exhaust manifold-to-cylinder head gasket surface for excessive scratches or gouging.
  4. Inspect for a loose, damaged, or cracked heat shield (603).
  5. Inspect the exhaust pipe studs (605) for damaged threads.

    6. Object Number: 66607 Size: SH
  6. Use a straight edge and a feeler gage and measure the exhaust manifold cylinder head deck for warpage.

    7. An exhaust manifold deck with warpage in excess of 0.25 mm (0.01 in) within the 2 front or 2 rear runners or 0.5 mm (0.02 in) overall, may cause an exhaust leak and may effect OBD II system performance. Exhaust manifolds not within specifications must be replaced.