110. Intake Manifold Installation

Intake Manifold Installation (Seville/DeVille)





1. Install the intake manifold, fitting the plenum duct over the intake manifold duct.





2. Loosely install the intake manifold bolts.





Notice: Refer to Fastener Notice in Service Precautions.

3. Tighten the intake manifold bolts in sequence (1-10).
^ Tighten the intake manifold bolts to 10 Nm (89 inch lbs.).





4. Tighten the plenum duct clamp (1) to the intake manifold.
^ Tighten the plenum duct clamp to 2.75 Nm (24 inch lbs.).





5. Inspect the fuel injector O-rings. Ensure the fuel injector O-rings are not missing, mix-aligned or damaged. Replace the O-rings if necessary.
6. Lubricate the intake manifold fuel injector bores with light mineral oil GM P/N 9981704, clean engine oil, or equivalent.
7. Install the fuel rail with fuel injectors as an assembly.
8. Install the fuel rail studs.
^ Tighten the fuel rail studs to 9 Nm (80 inch lbs.).





9. Install the fuel rail bracket nut to the engine lift bracket.
^ Tighten the fuel rail bracket nut to 10 Nm (89 inch lbs.).





10. Install the fuel injector wiring harness.
11. Connect the fuel injector electrical connectors (1) to the fuel injectors.





12. Install the PCV dirty air tube to the PCV orifice in the right camshaft cover and to the intake manifold.





13. Install the PCV fresh air feed tube to the camshaft cover and the water crossover.





14. Install the fuel pressure regulator vacuum tube to the fuel pressure regulator and the throttle body.





15. Install the brake booster hose to the throttle body.