Intake Manifold (Lower): Installation

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Apply a 3/16" (5 mm) bead of RTV (GM P/N 1052289) or equivalent to 4 sealing corners of block. See Fig 1. Extend bead 1/2" (13 mm) up each cylinder head.
Apply Loctite® 242 (GM P/N 12345382) or equivalent to lower intake manifold bolt threads. Tighten bolts in sequence to specification. See Fig 2. See TORQUE SPECIFICATIONS table.

CAUTION: Always use NEW "O" rings when reconnecting fuel lines at rear of engine.

To complete installation, reverse removal procedure. Fill and bleed cooling system. See COOLING SYSTEM BLEEDING .

Fig 1: Applying RTV Sealant Before Installing Intake Manifold

Courtesy of GENERAL MOTORS CORP.

Fig 2: Intake Manifold Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.