GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Catera 🢒 Engine 🢒 Engine Mechanical - 3.0L 🢒 Intake Plenum Installation

    Object Number: 158560 Size: SH
  1. Install the intake plenum and install the intake plenum seals.
  2. Install the intake plenum bolts.

    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.

    Tighten
    Tighten the intake plenum bolts to 20 N·m (15 lb ft).

  3. Install the intake plenum bolt covers.

    4. Object Number: 217276 Size: SH
  4. Install the crankcase vent tube adapter and install the crankcase vent tube adapter seal.
  5. Install the crankcase vent tube adapter bolt.
  6. Tighten the crankcase vent tube adapter bolt until fully seated. DO NOT strip the bolt.
  7. Install the crankcase vent tube adapter cover.

    8. Object Number: 158555 Size: SH
  8. Install the throttle body gasket to the plenum.
  9. Install the throttle body to the plenum.
  10. Install the throttle body bolts.

    11. Tighten
    Tighten the throttle body bolts to 8 N·m (71 lb in).