GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Riviera 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Supercharger Installation

    Object Number: 189735 Size: SH
  1. Install the supercharger gasket.

    2. Object Number: 42224 Size: SH
  2. Install the supercharger.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the spacers, bolts, and stud to the supercharger in the proper locations.

    4. Tighten
    Tighten the stud/bolts to 23 N·m (17 lb ft).


    Object Number: 66072 Size: SH
  4. Install the throttle body and gasket.
  5. Install the throttle body nuts.

    6. Tighten
    Tighten the throttle body nuts to 10 N·m (89 lb in).


    Object Number: 211911 Size: SH
  6. Install the engine wiring harness heat shield.
  7. Install the engine wiring harness heat shield bolt and nut.

    8. Tighten
    Tighten the engine wiring harness heat shield bolt and nut to 10 N·m (89 lb in).


    Object Number: 192753 Size: SH
  8. Install the MAP sensor bracket.
  9. Install the MAP sensor bracket bolts.

    10. Tighten
    Tighten the MAP sensor bracket bolts to 30 N·m (22 lb ft).

  10. Install the vacuum block.
  11. Install the vacuum block bolts.

    12. Tighten
    Tighten the vacuum block bolts to 10 N·m (89 lb in).

  12. Install the boost solenoid.
  13. Install the boost solenoid bolts.

    14. Tighten
    Tighten the boost solenoid bolts to 26 N·m (19 lb ft).

  14. Install the regulator valve and harness bolt.

    15. Object Number: 189732 Size: SH
  15. Install the booster bypass.
  16. Install the booster bypass nut.

    17. Tighten
    Tighten the booster bypass nut to 10 N·m (89 lb in).


    Object Number: 189738 Size: SH
  17. Install the fuel rail.
  18. Install the fuel rail nuts and stud.

    19. Tighten
    Tighten the fuel rail nuts and stud to 10 N·m (89 lb in).

  19. Install the vacuum line to the fuel rail.
  20. Install the spark plug wires.