Intake Manifold (Lower) Installation(7.4L)

Use NEW gaskets if old gaskets are damaged. Install gaskets with "THIS SIDE UP" stamp facing up. Apply Loctite® 242 (12345382) or equivalent, to lower intake manifold bolts. Tighten lower intake manifold bolts in sequence to specification. See Figure. See TORQUE SPECIFICATIONS  table. To complete installation, reverse removal procedure. See Figure.

Fig 1: Applying RTV Sealant to Intake Manifold (4.3L, 5.0L & 5.7L)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Lower Intake Manifold Bolt Tightening Sequence (4.3L, 5.0L & 5.7L)

Courtesy of GENERAL MOTORS CORP.