GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Aurora 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 Throttle Body Spacer Replacement

Removal Procedure

    Object Number: 41529 Size: SH
  1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
  2. Remove the intake air duct from the air cleaner housing.

    3. Object Number: 154945 Size: SH
  3. Remove the MAF sensor electrical connector (2) from the MAF sensor (5).

    4. Object Number: 19022 Size: SH

    Notice: Do not damage the MAF sensor screen. A damaged screen could restrict airflow and lead to a driveability concern.

  4. Remove the MAF sensor bolts.
  5. Remove the MAF sensor and intake air duct as an assembly.

    6. Object Number: 18918 Size: SH
  6. Remove the accelerator controls cable bracket. Refer to Accelerator Control Cable Bracket Replacement .

    7. Object Number: 18590 Size: SH
  7. Remove the throttle body. Refer to Throttle Body Assembly Replacement .

    8. Object Number: 19023 Size: SH
  8. Remove the throttle body spacer bolts (3).

    9. Object Number: 43066 Size: SH
  9. Remove the crankcase ventilation pipe at throttle body spacer.

    10. Object Number: 53639 Size: SH
  10. Remove the EGR valve water pump crossover pipe at throttle body spacer.

    11. Object Number: 19023 Size: SH
  11. Remove the throttle body spacer (3) and gasket (2) from the intake manifold (4).

    12. Notice: Use care when cleaning the old gasket from the aluminum surfaces in order to prevent damage to the sealing surfaces.

    Notice: Do not use a cleaner which contains methyl ethyl ketone. This extremely strong solvent may damage components and is not necessary for this type of cleaning.

    Use a carburetor cleaner in order to remove deposits.

    Refer to the instructions provided with the cleaner.

  12. Clean the throttle body gasket surfaces.
  13. Clean the throttle body spacer gasket surfaces.

Installation Procedure

    Object Number: 19023 Size: SH

    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.

  1. Install the throttle body spacer gasket (2) and throttle body spacer (3).

    2. Tighten
    Tighten the throttle body spacer attaching bolts to 12 N·m (106 lb in).


    Object Number: 18590 Size: SH
  2. Install the new throttle body gasket.
  3. Install the throttle body. Refer to Throttle Body Assembly Replacement .

    4. Tighten
    Tighten the throttle body attaching bolts to 12 N·m (106 lb in).


    Object Number: 43066 Size: SH
  4. Install the crankcase ventilation pipe at throttle body spacer.

    5. Object Number: 53639 Size: SH
  5. Install the EGR valve water pump crossover pipe to throttle body spacer.

    6. Tighten
    Tighten the EGR pipe bolt to 24 N·m (18 lb ft).


    Object Number: 19022 Size: SH
  6. Install the MAF sensor and intake air duct assembly.

    7. Tighten
    Tighten the bolts to 8 N·m (71 lb in).

  7. Install the intake air duct clamp.

    8. Tighten
    Tighten the clamp (s) to 3.5 N·m (31 lb in) at the MAF sensor and 1.8 N·m (16 lb in) at the air cleaner.


    Object Number: 154945 Size: SH
  8. Install the MAF sensor electrical connector (2) to the MAF sensor (5).

    9. Object Number: 18918 Size: SH
  9. Install the accelerator controls cable bracket. Refer to the Accelerator Control Cable Bracket Replacement .

    10. Object Number: 42751 Size: SH
  10. Install the intake manifold top cover.

    11. Tighten
    Tighten the nuts to 3 N·m (27 lb in).

  11. Install the negative battery cable.
  12. Install the rear seat cushion. Refer to Rear Seat Cushion Replacement .