ParkAvenue 1997-1999

Supercharger

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Fluid Recommendations



Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

When adding oil to the supercharger, use only synthetic oil, GM part no. 12345982 or equivalent.

Level Check



Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999


WARNING
Do NOT remove the oil plug when the engine is warm. The engine should be cool to the touch, about 2-3 hours after running. Removing the oil pump when the engine is still warm can cause hot oil to overflow. This could result in loss of oil and possible personal injury.

  1. Remove the wiring harness shield or engine acoustic cover, as applicable.
  2.  
  3. Use a rag to clean the area around the oil fill plug before removing it.
  4.  
  5. Remove the oil plug. The oil level should be maintained to the bottom of the plug threads. Do not use petroleum based oil. When adding oil, use only GM part no. 12345982 synthetic oil, or equivalent. Failure to do so may cause supercharger failure.
  6.  



Click image to see an enlarged view

Fig. Location of the supercharger oil fill plug - 1994 vehicle shown, other years similar

  1. After filling the supercharger to the proper level, make sure the O-ring is on the oil plug, then install the plug. Tighten the plug to 88 inch lbs. (10 Nm).
  2.  
  3. Install the wiring harness shield or engine acoustic cover, as applicable.
  4.  

Removal & Installation



Specific to:

Buick Park Avenue 1998-1999

Oldsmobile Regency 1998


NOTE
A small amount of oil seepage through the front seal is normal. This seepage is caused by minute traces of oil escaping around the seal due to normal pressure build up in the oil cavity within the supercharger. A build up of dust can stick to the thin oil film, which causes the oil seepage to appear worse than it really is. The supercharger should not be replaced for this seepage. However, if supercharger oil is visually dripping from the supercharger front seal, the supercharger will need to be replaced. The supercharger oil level should be checked every 30,000 miles or every 36 months.



Click image to see an enlarged view

Fig. Exploded view of the supercharger and related components-3.8L (VIN 1) engine

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Relieve the fuel system pressure.
  6.  
  7. Drain the cooling system.
  8.  
  9. Remove or disconnect the following:

    Supercharger belt
     
    Engine cover
     
    Air duct from the throttle body
     
    Right side spark plug wires from the ignition module
     
    Alternator brace with purge solenoid
     
    Exhaust Gas Recirculation (EGR) wiring harness and shield, if necessary
     
    Manifold Absolute Pressure (MAP) sensor bracket
     
    Fuel lines
     
    Fuel injector connectors
     
    Fuel rail with injectors
     
    Booster bypass solenoid
     
    Regulator valve and harness bolt
     
    Boost control solenoid
     
    Throttle body bolts and the assembly
     
    Supercharger bolts and the assembly
     

  10.  

To install:

  1. Install or connect the following:

    Supercharger with new gasket and torque the bolts, gradually and evenly, to 17 ft. lbs. (23 Nm).
     
    MAP sensor bracket
     
    Throttle body and torque the nuts to 89 inch lbs. (10 Nm)
     
    Boost control solenoid and torque the nut to 72 inch lbs. (8 Nm)
     
    Regulator valve and harness bolt
     
    Booster bypass solenoid
     
    Fuel rail with injectors
     
    Fuel lines
     
    Electrical connectors to the fuel injectors
     
    Alternator brace with purge solenoid
     
    EGR wiring harness and shield
     
    Right side spark plug wires
     
    Supercharger drive belt
     
    Air duct
     
    Engine cover
     
    Negative battery cable
     

  2.  
  3. Refill and bleed the cooling system.
  4.  
  5. Run the engine and check for leaks and proper engine operation.
  6.  

3.8L (VIN 1) Engine

Specific to:

Buick LeSabre 1992-1995

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1995

Pontiac Bonneville 1992-1995

  1. Properly relieve the fuel system pressure, as outlined in Section 5 of this manual.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the accessory drive belt from the supercharger pulley.
  6.  
  7. Remove the fuel injector sight shield.
  8.  
  9. Disconnect the fuel pipes from the fuel rail.
  10.  
  11. Tag and disconnect any necessary vacuum hoses.
  12.  
  13. Detach the electrical connectors from the fuel injectors.
  14.  
  15. Remove the electrical harness shield and electrical harness from the front of the supercharger.
  16.  
  17. Remove the fuel rail mounting bolts. Remove the fuel rail with the injectors intact.
  18.  
  19. Tag and detach the electrical connectors at the Idle Air Control (IAC) valve, Throttle Position (TP) sensor, Mass Air Flow (MAF) sensor, EGR, boost control solenoid and engine coolant temperature sensor. Lay the wiring harness aside.
  20.  
  21. Remove the air intake duct from the throttle body, and remove the EGR pipe from the supercharger.
  22.  
  23. Disconnect the throttle and the cruise control cables.
  24.  
  25. Remove the boost pressure manifold and vacuum block.
  26.  
  27. Remove the cable bracket.
  28.  
  29. Remove the tensioner bracket-to-supercharger mounting stud. The stud must be removed, or the supercharger cannot be lifted high enough to clear the supercharger from the lower intake locator pins. This could cause parts damage. To remove the stud, use a stud removal tool or jam nut procedure. The jam nut procedure consists of the following:
    1. Tighten two 8mm nuts together on the stud.
    2.  
    3. Remove the stud by placing the wrench on the inner nut, then turn counterclockwise.
    4.  

  30.  
  31. Remove the throttle body from the supercharger.
  32.  
  33. Unfasten the supercharger-to-intake manifold bolts, then remove the supercharger from the intake manifold. Remove the supercharger gasket and coolant passage O-rings. Clean the intake manifold and supercharger mating surfaces. Check that the locator pins are in the proper positions, as shown in the accompanying figure.
  34.  



Click image to see an enlarged view

Fig. Exploded view of the supercharger mounting - 1992-95 vehicles

To install:

  1. Before installing the supercharger, remove the tensioner bracket-to-supercharger stud.
  2.  
  3. Replace the coolant passage O-rings and the supercharger gasket. Do NOT use any sealer on the gasket!
  4.  
  5. Place the supercharger in position, then install the bolts finger-tight.
  6.  
  7. Install the tensioner bracket-to-supercharger stud. Tighten the bolts and stud as follows:
    1. 1992-93 vehicles: Tighten to 19 ft. lbs. (26 Nm).
    2.  
    3. 1994-95 vehicles: Tighten the stud to 88 inch lbs. (10 Nm) and the bolts to 19 ft. lbs. (26 Nm).
    4.  

  8.  
  9. If equipped, install the tensioner bracket nut and tighten to 37 ft. lbs. (50 Nm).
  10.  
  11. Install the throttle body and gasket. Tighten the throttle body retainers to 11 ft. lbs. (15 Nm).
  12.  
  13. Install the boost pressure manifold. Install the vacuum block, with a new gasket and tighten the retainers to 62 inch lbs. (7 Nm).
  14.  
  15. Install the cable bracket and connect the throttle and cruise control cables.
  16.  
  17. Connect the EGR pipe to the supercharger and install the air intake duct.
  18.  
  19. Attach the electrical connectors to the IAC, TPS, MAF, EGR, boost control solenoid and engine coolant temperature sensor.
  20.  
  21. Install the fuel rail and retaining bolts. Tighten the bolts to 15 ft. lbs. (24 Nm).
  22.  
  23. Attach the fuel injector electrical connectors.
  24.  
  25. Connect the vacuum hoses, as tagged during removal.
  26.  
  27. Connect the fuel pipes to the fuel rail.
  28.  
  29. Install the electrical harness and shield to the front the of the supercharger.
  30.  
  31. Install the accessory drive belt on the supercharger pulley.
  32.  
  33. Connect the negative battery cable.
  34.  
  35. Start the engine and check for leaks and/or noise.
  36.  

Specific to:

Buick LeSabre 1996-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1996-1999

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1996-1999

  1. Properly relieve the fuel system pressure, as outlined in Section 5 of this manual.
  2.  
  3. If not already done, disconnect the negative battery cable.
  4.  
  5. Remove the engine cover.
  6.  
  7. Remove the air duct.
  8.  
  9. Remove the supercharger belt, as outlined in Section 1 of this manual.
  10.  
  11. Tag and disconnect the right side spark plug wires from the ignition module, then position them aside.
  12.  
  13. Remove the alternator brace (with the purge solenoid, if equipped).
  14.  
  15. For 1997-99 vehicles, disconnect the EGR wiring harness and remove the EGR wiring harness shield.
  16.  
  17. Detach the electrical connectors from the fuel injectors.
  18.  
  19. Remove the MAP sensor bracket.
  20.  
  21. Unfasten the fuel rail mounting bolts, then remove the fuel rail and the injectors, as an assembly.
  22.  
  23. Remove the boost control solenoid, as follows:
    1. Disconnect the boost source and signal hose from the solenoid.
    2.  
    3. Detach the electrical connector.
    4.  
    5. Unfasten the retaining nut, then remove the boost control solenoid.

      Click image to see an enlarged view

      Fig. Remove the boost control solenoid

    6.  

  24.  
  25. For 1997-99 vehicles, remove the accelerator control cable bracket with the cables.
  26.  



Click image to see an enlarged view

Fig. On some vehicles, you must remove the accelerator control cable bracket, along with the cables

  1. Unfasten the throttle body nuts and remove the throttle body.
  2.  



Click image to see an enlarged view

Fig. Remove the throttle body-to-supercharger retainers, then remove the throttle body

Make sure to make note of the supercharger retainer positions for installation.

  1. Remove the supercharger retainers (bolts, studs and spacers), then remove the supercharger from the vehicle. Remove and discard the gasket, then thoroughly clean the gasket mating surfaces.
  2.  



Click image to see an enlarged view

Fig. The supercharger retainers must be installed in the same positions from which they were removed

To install:

  1. Install a new supercharger-to-intake gasket. Do NOT use any sealer on the gasket.
  2.  
  3. Position the supercharger over the gasket, then secure using the retaining bolts. Tighten the bolts to 17 ft. lbs. (23 Nm).
  4.  
  5. Install the MAP sensor bracket. Tighten the retaining bolts to 22 ft. lbs. (30 Nm).
  6.  
  7. Position the throttle body to the supercharger and install the retaining nuts. Tighten to 89 inch lbs. (10 Nm).
  8.  
  9. For 1997-99 vehicles, install the accelerator control cable bracket with the cables attached. Secure with the retaining bolts/screws.
  10.  
  11. Install the boost control solenoid, as follows:
    1. Install the boost control solenoid to the bypass actuator bracket.
    2.  
    3. Install the retaining nut and tighten to 72 inch lbs. (8 Nm).
    4.  
    5. Attach the electrical connector.
    6.  
    7. Connect the boost vacuum source and signal hose.
    8.  

  12.  
  13. Install the fuel rail, install the retaining nuts/bolts and stud. Tighten the retaining nuts/bolts to 89 inch lbs. (10 Nm) and the stud to 18 ft. lbs. (25 Nm). Connect the fuel lines and attach the electrical connectors.
  14.  
  15. Install the alternator brace, with the purge solenoid, if equipped. Tighten the retainers to 22 ft. lbs. (30 Nm).
  16.  
  17. Install the EGR wiring harness shield bolt/screw and nut. Tighten the bolt/screw to 89 inch lbs. (10 Nm) and the nut to 89 inch lbs. (10 Nm). Attach the EGR wiring harness.
  18.  
  19. Connect the right side spark plug wires to the ignition module, as tagged during removal.
  20.  
  21. Install the supercharger belt.
  22.  
  23. Install the engine cover, then connect the negative battery cable.
  24.  
  25. Start the engine and check for leaks and proper operation.
  26.