Intake Manifold Lower

This article has been updated with bulletin No: 03-06-01-010B

1. Apply 8-12 mm (0.08-0.11 inch) bead of RTV Sealer GM P/N 12345739 or equivalent on each ridge where front and rear of the lower intake manifold contact the engine block (1).








2. Install a new design intake manifold gasket. The material used in the gasket has been changed in order to improve the sealing qualities of the gasket. When replacing the gasket, the intake manifold bolts must also be replaced and torqued to a revised specification. The new bolts will come with a pre-applied threadlocker on them.





3. Install the lower intake manifold.
4. Apply sealant GM P/N 12345382 or equivalent to the threads of the bolts.

CAUTION: An oil leak may result if the vertical bolts are not tightened before the diagonal bolts.

5. Hand tighten the vertical bolts.
6. Hand tighten the diagonal bolts.

NOTICE An oil leak may result if the vertical bolts are not tightened before the diagonal bolts.

NOTE: Diagonal bolts may require a crows foot to tighten.





TIGHTEN
a. Tighten the vertical lower intake manifold bolts (1) to 7.0 Nm (62 lb. in.).
b. Tighten the diagonal lower intake manifold bolts (2) to 7.0 Nm (62 lb. in.).
c. Tighten the vertical lower intake manifold bolts (1) to 13.0 Nm (115 lb. in.).
d. Tighten the diagonal lower intake manifold bolts (2) to 25.0 Nm (18 lb. ft.).

7. Connect the upper radiator hose to the engine. Refer to Cooling System.
8. Connect the heater inlet pipe to the lower intake manifold. Refer to Heating and Air Conditioning.
9. Install the power steering pump to the front engine cover. Refer to Steering and Suspension.
10. Install the fuel injector rail. Refer to Powertrain Management.
11. Connect the fuel feed and return pipe to the fuel injector rail. Refer to Powertrain Management.
12. Install the right (rear) valve rocker arm cover.
13. Install the left (front) valve rocker arm cover.
14. Install the upper intake manifold.
15. Connect the battery ground (negative) cable.