GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Opel 🢒 2009 🢒 Insignia NB (Global Epsilon) 🢒 Engine 🢒 Engine Mechanical - 2.8L, 3.0L, 3.2L, or 3.6L 🢒 Exhaust Manifold Cleaning and Inspection - Bank2

Cleaning Procedure
  1. Clean the exhaust manifold in solvent.

    2. Warning: Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury.

  2. Dry the exhaust manifold with compressed air.

Inspection Procedure

    Object Number: 2026798 Size: SH
  1. Inspect the exhaust manifold for the following:
    2. • Damage or excessive corrosion to the exhaust manifold exterior (4)
    • Damage to the exhaust manifold mounting holes (1)
    • Damage to the threaded holes (3)
    • Damage to the exhaust manifold flange bolt holes (2)

    Object Number: 2026981 Size: SH
  2. Inspect the left exhaust manifold for the following:
    3. • Damage to the gasket sealing surfaces (1)
    • Damage or restrictions within the exhaust passages (2)
  3. Repair or replace the left exhaust manifold and/or components as necessary.

    4. Object Number: 1830276 Size: SH
  4. Measure the alignment or surface flatness of the exhaust manifold flanges, using a straight edge and a feeler gage. Exhaust manifold surface flatness must not exceed 0.254 mm (0.010 in).
  5. If the surface flatness is not within specifications, the exhaust manifold is warped and must be replaced.