GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2008 🢒 STS 🢒 Engine 🢒 Engine Mechanical - 4.4L 🢒 Supercharger Installation

Tools Required

    • EN 46109 Guide Pins
    • EN-47748 Supercharger Lifting Fixture
    • EN-47833 Supercharger Service Holding Fixture

    Object Number: 1656786 Size: SH
  1. Install the NEW supercharger gaskets.

    2. Object Number: 1676028 Size: SH
  2. Install the 8 mm (0.31 in) EN 46109 into cylinder head supercharger mounting bolt holes at opposing corners.

    3. Object Number: 1656785 Size: SH

    Caution: The supercharger must be lifted with the EN 47748. The weight of the supercharger assembly is approximately 34 kg (75 lb) and could cause injury if lifted by hand.

    Notice: The supercharger must be lifted with the EN 47748. Damage could occur to the finish and/or components of the supercharger and surrounding engine or vehicle components.

  3. Lift the supercharger assembly off of the table using appropriate lifting equipment.

    4. Object Number: 1656784 Size: SH
  4. Remove the EN-47833 from the supercharger.

    5. Object Number: 1656781 Size: SH
  5. Install the supercharger using the EN-47748 with appropriate lifting equipment.

    6. Object Number: 1676034 Size: SH
  6. As the supercharger is lowered into place carefully align the EN 46109 with the corner mounting holes of the supercharger.

    7. Object Number: 1656778 Size: SH
  7. Remove the EN-47748 from the supercharger.

    8. Object Number: 1676038 Size: SH
  8. Remove the EN 46109 .

    9. Object Number: 1656777 Size: SH
  9. Loosely install the supercharger bolts.

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


    Object Number: 1743698 Size: SH
  10. Tighten the supercharger bolts in sequence as shown.

    11. Tighten
    Tighten the supercharger bolts in sequence to 25 N·m (18 lb ft).


    Object Number: 1656776 Size: SH
  11. Place the fuel injector rail assembly into position and align each fuel injector with the fuel injector bores in the supercharger.

    12. Object Number: 1656775 Size: SH
  12. Place the fuel injection rail crossover tube into the clip (1) and fasten.

    13. Object Number: 1656768 Size: SH
  13. Install the fuel injection rail studs.

    14. Tighten
    Tighten the fuel injection rail studs to 10 N·m (89 lb in).


    Object Number: 1656767 Size: SH
  14. Connect the dirty air positive crankcase ventilation (PCV) tube (1) to the right camshaft cover.

    15. Object Number: 1656764 Size: SH
  15. Install the bracket with sensors and tubes.

    16. Object Number: 1656762 Size: SH
  16. Connect the supercharger inlet absolute pressure sensor vacuum tube connection (1) to the supercharger fitting.

    17. Object Number: 1656761 Size: SH
  17. Connect the manifold absolute pressure (MAP) sensor vacuum tube connection (1) to the supercharger fitting.

    18. Object Number: 1656757 Size: SH
  18. Install the fuel injector sight shield cover ball studs.

    19. Tighten
    Tighten the fuel injection sight shield cover ball studs to 10 N·m (89 lb in).


    Object Number: 1656879 Size: SH
  19. Install the NEW charge air cooler coolant front manifold O-rings.

    20. Object Number: 1656756 Size: SH
  20. Install the charge air cooler coolant front manifold.
  21. Install the charge air cooler coolant front manifold bolts.

    22. Tighten
    Tighten the charge air cooler coolant front manifold bolts to 25 N·m (18 lb ft).


    Object Number: 1656816 Size: SH
  22. Install and connect the clean air positive crankcase ventilation (PCV) tube to the left camshaft cover.