LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 2008 >> Torrent GXP, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Engine Mechanical - 3.6L (4 Of 5)) >> Repair Instructions - Off Vehicle (2 Of 3) >> Intake Manifold Cleaning and Inspection >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Upper Intake Manifold Inspection Areas (1 Of 3)
    GM1832179Courtesy of GENERAL MOTORS CORP.
  1. Inspect the upper intake manifold for the following conditions:
    • Damage, debris or restrictions to the PCV system hose port (1)
    • Damage, debris or restrictions to the EVAP purge solenoid port (2)
    • Damage to the intake manifold bolt bosses (3)
    • Damage to the EVAP purge solenoid mounting boss (4)
    • Damage, debris or restrictions to the brake vacuum booster hose port (5)
    • Damage or corrosion to the intake manifold expansion plugs (6)
    • Damage to the engine coolant air bleed pipe bracket mounting boss (7)
    2. Fig 2: Identifying Upper Intake Manifold Inspection Areas (2 Of 3)
    GM1832180Courtesy of GENERAL MOTORS CORP.
  2. Inspect the upper intake manifold for the following conditions:
    • Damage to the threads and boss for the fuel injector sight shield ball stud (1)
    • Damage, debris or restrictions within the intake manifold passages (2)
    • Damage to the engine coolant air bleed pipe bracket mounting boss (3)
    • Damage to the intake manifold bolt bosses (4)
    • Damage or corrosion to the intake manifold expansion plug (5)
    • Damage to the throttle body bolt holes (6)
    3. Fig 3: Identifying Upper Intake Manifold Inspection Areas (3 Of 3)
    GM1832335Courtesy of GENERAL MOTORS CORP.
  3. Inspect the upper intake manifold for the following conditions:
    • Gouges or damage to the upper intake manifold sealing surfaces (1)
    • Damage to the gasket sealing surface (2) for the throttle body
    4. Fig 4: View Of Upper Intake Manifold Sealing Surface Inspection For Warpage
    GM1832336Courtesy of GENERAL MOTORS CORP.
  4. Inspect the upper intake manifold sealing surface for warpage.
    1. Locate a straight edge across the upper-to-lower intake manifold sealing surface.
    2. Insert a feeler gage between the upper intake manifold and the straight edge. An upper intake manifold with warpage in excess of 0.50 mm (0.020 in) must be replaced.
  5. Repair or replace the upper intake manifold as necessary.


    Fig 1: Inspecting Lower Intake Manifold For Damage
    GM1211107Courtesy of GENERAL MOTORS CORP.
  1. Inspect the lower intake manifold for the following conditions:
    • Damage, debris or restrictions to the lower intake manifold ports
    • Damage to the fuel rail mounting bolt holes
    • Damage to the fuel rail
    2. Fig 2: Checking Lower Intake Manifold For Damage
    GM1211110Courtesy of GENERAL MOTORS CORP.
  2. Inspect the lower intake manifold for the following conditions:
    • Gouges or damage to the intake manifold sealing surfaces
    • Damage to the lower intake manifold bolt bosses
    • Damage to the fuel injector ports
    3. Fig 3: Measuring Lower Intake Manifold For Warpage
    GM1211113Courtesy of GENERAL MOTORS CORP.
  3. Inspect the lower intake manifold sealing surfaces for warpage.
    1. Locate a straight edge across the lower intake manifold sealing surfaces.
    2. Insert a feeler gage between the lower intake manifold and the straight edge. A lower intake manifold with warpage in excess of 0.5 mm (0.020 in) must be replaced.
  4. Repair or replace the lower intake manifold as necessary.
scientia non olet · About LEMON Manuals