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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Engine Mechanical) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Intake Manifold Cleaning and Inspection >> Cleaning Procedure

Cleaning Procedure

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of MAP Sensor
    GM1277093Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not use the intake manifold-to-cylinder head sealing gaskets again.
  1. Remove the manifold absolute pressure (MAP) sensor (714) from the rear of the intake. The MAP sensor is to be reinstalled upon completion of the cleaning and inspection procedures.
  2. Inspect the sealing grommet on the MAP sensor. The grommet should not be torn or damaged.
    3. Fig 2: View Of Intake Manifold-To-Cylinder Head Gasket
    GM1277097Courtesy of GENERAL MOTORS CORP.
  3. Remove and discard the intake manifold-to-cylinder head gaskets (514).
    4. Fig 3: View Of Fuel Rail W/Injectors
    GM1201536Courtesy of GENERAL MOTORS CORP.
  4. Remove the fuel rail with injectors. Refer to Fuel Rail and Injectors Removal .
    5. Fig 4: View Of Throttle Body & Nuts
    GM825837Courtesy of GENERAL MOTORS CORP.
  5. Remove the throttle body and gasket. Refer to Throttle Body Removal .
    6. Fig 5: View Of EVAP Purge Solenoid, Bolt & Isolator
    GM1277094Courtesy of GENERAL MOTORS CORP.
  6. Remove the evaporative emission (EVAP) canister purge solenoid valve (708), bolt (710), and isolator (709).
  7. Clean the intake manifold in solvent.
    • Clean the intake manifold gasket surfaces.
    • Clean the intake manifold internal passages.
    8. CAUTION: Refer to Safety Glasses Caution .
  8. Dry the intake manifold with compressed air.
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