GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 XLR 🢒 Engine 🢒 Engine Mechanical - 4.6L (LH2) 🢒 Intake Manifold Installation
  1. Ensure the NEW gaskets are installed in the intake manifold.

    2. Object Number: 1575683 Size: SH
  2. Place the intake manifold in position.

    3. Object Number: 1575682 Size: SH
  3. Loosely install the 10 bolts attaching the intake manifold to the cylinder heads.

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


    Object Number: 928179 Size: SH
  4. Tighten the intake manifold bolts in sequence (1-10).

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

  5. Lubricate the intake manifold fuel injector bores with light mineral oil GM P/N 9981704, clean engine oil or equivalent.

    6. Object Number: 1575681 Size: SH

    Important: DO NOT force the injectors into position.

  6. Install the entire fuel rail and injector assembly into the intake manifold by pressing the fuel rail and injector simultaneously into the correct position.

    7. Object Number: 1575680 Size: SH
  7. Install the bolts attaching the fuel rail to the intake manifold.

    8. Tighten
    Tighten the fuel rail bolts to 10 N·m (89 lb in).


    Object Number: 1575679 Size: SH
  8. Install the sight shield bracket.
  9. Install the sight shield bracket nuts.

    10. Tighten
    Tighten the sight shield bracket nuts to 10 N·m (89 lb in).


    Object Number: 1575678 Size: SH
  10. Connect the PCV dirty air tube to the camshaft cover.

    11. Object Number: 1575677 Size: SH
  11. Connect the PCV fresh air tube to the camshaft cover.