Chevrolet Silverado / GMC Sierra. Service manual — part 38

Gasket
Courtesy of GENERAL MOTORS CORP.

1. Apply a 4.0 mm (0.157 in) patch of adhesive to the cylinder head side of the intake

manifold gasket at each end. Refer to Sealers, Adhesives, and Lubricants for the correct
part number.

2. Install the intake manifold gasket onto the cylinder head. Use the gasket locating pins in

order to properly seat the gasket.

IMPORTANT: The intake manifold gasket must be installed while the

adhesive is still wet to the touch.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 94: Applying Adhesive To Front Top Of Engine Block
Courtesy of GENERAL MOTORS CORP.

3. Apply a 5 mm (0.197 in) bead of adhesive to the front top of the engine block. Refer to

Sealers, Adhesives, and Lubricants for the correct part number.

4. Extend the adhesive bead 13 mm (0.50 in) up onto each intake manifold gasket.

Fig. 95: Applying Adhesive To Rear Top Of Engine Block
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The intake manifold must be installed and the fasteners

tightened while the adhesive is still wet to the touch.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

5. Apply a 5 mm (0.197 in) bead of adhesive to the rear top of the engine block. Refer to

Sealers, Adhesives, and Lubricants for the correct part number.

6. Extend the adhesive bead 13 mm (0.50 in) up onto each intake manifold gasket.

Fig. 96: Intake Manifold
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

7. Install the intake manifold.

8. If reusing the old fasteners, apply threadlock to the threads of the intake manifold - lower

bolts. Refer to Sealers, Adhesives, and Lubricants for the correct part number.

9. Install the intake manifold - lower bolts.

Fig. 97: Intake Manifold Lower Bolt Tightening Sequence
Courtesy of GENERAL MOTORS CORP.

NOTE:

Proper lower intake manifold fastener tightening sequence and
torque is critical. Always follow the tightening sequence, and

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado