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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 516 (ENGINE MECHANICAL - 4.3L (UNIT REPAIR))REPAIR INSTRUCTIONSINTAKE MANIFOLD INSTALLATION
1998 Chevrolet Suburban K2500, 7.4 J, Part Time

Intake Manifold Installation

1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Intake Manifold Installation
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
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. 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.

    Fig 1: Applying Adhesive To Cylinder Head Side Of Lower Intake Manifold Gasket
    G01689908Courtesy of GENERAL MOTORS CORP.

    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 To Front Top Of Engine Block
    G01689909Courtesy 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 To Rear Top Of Engine Block
    G01689910Courtesy 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: Lower Intake Manifold & Bolts
    G01689911Courtesy 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.