GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Holden 🢒 2008 🢒 VE Ute 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Intake Manifold Cleaning and Inspection

Cleaning Procedure
  1. Remove the fuel rail with injectors. Refer to Fuel Rail and Injectors Removal.
  2. Remove the evaporative emission hoses/pipes. Refer to Evaporative Emission Hoses/Pipes Replacement - Engine.
  3. Remove the evaporative emission (EVAP) canister vent solenoid valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .
  4. Remove the throttle body and gasket. Refer to Throttle Body Removal.
  5. Clean the intake manifold in solvent.

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

  6. Dry the intake manifold with compressed air.

Inspection Procedure
  1. Inspect the manifold for the following conditions:
    2. • Loose threaded inserts or studs.
    • Damaged gasket or sealing surfaces.
    • Damaged or broken vacuum fittings.
    • Debris or restrictions within the passages of the manifold.
    • Inspect the composite intake manifold assembly for cracks or other damage.
  2. Inspect the intake manifold cylinder head deck for warpage.
    3. 2.1. Locate a straight edge across the intake manifold cylinder head deck surface.

    Position the straight edge across a minimum of two runner port openings.

    2.2. Insert a feeler gage between the intake manifold and the straight edge.

    An intake manifold with warpage in excess of 3 mm (0.118 in) over a 200 mm (7.87 in) area is warped and should be replaced.