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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 9 (ENGINE MECHANICAL - 4.3L UNIT REPAIR)REPAIR INSTRUCTIONSINTAKE MANIFOLD INSTALLATION
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F

Intake Manifold Installation

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Intake Manifold Installation
WARNING: This page is about a different variant/trim than selected.
NOTE: Apply the proper amount of the sealant when assembling this component. Excessive use of the sealant can prohibit the component from sealing properly. A component that is not sealed properly can leak leading to extensive engine damage.
  1. Apply a 4.0 mm (0.157 in) patch of adhesive GM P/N United States 12346141, GM P/N Canada 10953433, or equivalent, to the cylinder head side of the lower intake manifold gasket at each end.

    Important:  The lower intake manifold gasket must be installed while the adhesive is still wet to the touch.

    2. Fig 1: Applying Adhesive To Cylinder Head Side Of Lower Intake Manifold Gasket
    G02503117Courtesy of GENERAL MOTORS CORP.
  2. Install the lower intake manifold gasket onto the cylinder head. Use the gasket locator pins in order to properly seat the lower intake manifold gasket on the cylinder head.

    Important:  The lower intake manifold must be installed and the fasteners tightened while the adhesive is still wet to the touch.

  3. Apply a 5 mm (0.197 in) bead of adhesive GM P/N United States 12346141, GM P/N Canada 10953433, or equivalent, to the front top of the engine block.
  4. Extend the adhesive bead 13 mm (0.50 in) onto each lower intake manifold gasket.
    Fig 2: Applying Adhesive Bead Onto Each Lower Intake Manifold Gasket
    G02503118Courtesy of GENERAL MOTORS CORP.
  5. Apply a 5 mm (0.197 in) bead of adhesive GM P/N United States 12346141, GM P/N Canada 10953433, or equivalent, to the rear top of the engine block.
  6. Extend the adhesive bead 13 mm (0.50 in) onto each lower intake manifold gasket.
    Fig 3: Applying Adhesive Bead Onto Each Lower Intake Manifold Gasket
    G02503119Courtesy of GENERAL MOTORS CORP.
  7. Install the lower intake manifold onto the engine block.
  8. If reusing the fasteners, apply threadlock GM P/N United States 12345382, GM P/N Canada 10953489, or equivalent, to the threads of the lower intake manifold bolts.
  9. Install the lower intake manifold bolts.
    Fig 4: Installing Lower Intake Manifold
    G02503120Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.