GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2007 🢒 Lucerne 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Intake Manifold Installation

    Object Number: 1564109 Size: SH
  1. Install the intake manifold, fitting the plenum duct over the intake manifold duct.

    2. Object Number: 1564107 Size: SH
  2. Loosely install the intake manifold bolts.

    3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1564243 Size: SH
  3. Tighten the intake manifold bolts in sequence (1-10).

    4. Tighten
    Tighten the intake manifold bolts to 10 N·m (89 lb in).


    Object Number: 1564106 Size: SH
  4. Tighten the plenum duct clamp (1) to the intake manifold.

    5. Tighten
    Tighten the plenum duct clamp to 2.75 N·m (24 lb in).


    Object Number: 1564105 Size: SH
  5. Inspect the fuel injector O-rings. Ensure the fuel injector O-rings are not missing, mis-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. Object Number: 1564102 Size: SH
  8. Install the fuel rail studs.

    9. Tighten
    Tighten the fuel rail studs to 9 N·m (80 lb in).


    Object Number: 1564100 Size: SH
  9. Install the fuel rail bracket nut to the fuel rail stud at the engine lift bracket on the water crossover.

    10. Tighten
    Tighten the fuel rail bracket nut to 10 N·m (89 lb in).


    Object Number: 1564099 Size: SH
  10. Install the PCV dirty air tube to the PCV orifice in the right camshaft cover and to the intake manifold.

    11. Object Number: 1564098 Size: SH
  11. Install the PCV fresh air feed tube to the camshaft cover and the water crossover.

    12. Object Number: 1564096 Size: SH
  12. Install the brake booster hose to the vacuum fitting in the water crossover.