Intake Manifold Installation

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. 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.

Apply a 4.0 mm (0.157 in) patch of adhesive GM P/N 12346141 (Canadian P/N 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.
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: Apply Adhesive To Cylinder Head Side Of Lower Intake Manifold Gasket
Courtesy 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.
Apply a 5 mm (0.197 in) bead of adhesive GM P/N 12346141 (Canadian P/N 10953433) or equivalent, to the front top of the engine block.
Extend the adhesive bead 13 mm (0.50 in) onto each lower intake manifold gasket.

Fig 2: Showing Adhesive Application
Courtesy of GENERAL MOTORS CORP.
Apply a 5 mm (0.197 in) bead of adhesive GM P/N 12346141 (Canadian P/N 10953433) or equivalent, to the rear top of the engine block.
Extend the adhesive bead 13 mm (0.50 in) onto each lower intake manifold gasket.

Fig 3: Showing Adhesive Application
Courtesy of GENERAL MOTORS CORP.
Install the lower intake manifold onto the engine block.
If reusing the fasteners, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the lower intake manifold bolts.
Install the lower intake manifold bolts.

Fig 4: Install Lower Intake Manifold & Bolts
Courtesy of GENERAL MOTORS CORP.

NOTE: Proper lower intake manifold fastener tightening sequence and torque is critical. Always follow the tightening sequence, and torque the intake manifold bolts using the 3 step method. Failing to do so may distort the crankshaft bearing bore alignment and cause damage to the crankshaft bearings.

NOTE: Refer to FASTENER NOTICE .
Tighten the lower intake manifold bolts.
Tighten
1. 10.1. Tighten the bolts on the first pass in sequence (1-8) to 3 N.m (27 lb in).
2. 10.2. Tighten the bolts on the second pass in sequence (1-8) to 12 N.m (106 lb in).
3. 10.3. Tighten the bolts on the final pass in sequence (1-8) to 15 N.m (11 lb ft).
Fig 5: Tightening Sequence For Lower Intake Manifold Bolts
Courtesy of GENERAL MOTORS CORP.
Connect the evaporative emission (EVAP) canister solenoid valve harness.
1. 11.1. Push the elbow inward until the quick connect snaps into place.
2. 11.2. Pull the elbow outward in order to ensure proper connection.
Fig 6: Connect Evaporative Emission (EVAP) Canister Solenoid Valve Harness
Courtesy of GENERAL MOTORS CORP.