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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Lower Intake Manifold Installation

Lower Intake Manifold Installation F


    Object Number: 50046 Size: SH
  1. Clean the lower intake manifold sealing surface using GM P/N 12346139 (Canadian P/N 10953463) or equivalent prior to installing any seals or gaskets.
  2. Install the lower intake manifold gasket.
  3. Install the lower intake manifold.
  4. Apply threadlocker 272 GM P/N United States 12345493, GM P/N Canada 10953488 or the equivalent to the bolt threads.

    5. Object Number: 50288 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.

  5. Install the lower intake manifold bolts.

    6. Tighten
    Tighten the bolts in sequence to 15 N·m (11 lb ft).


    Object Number: 566980 Size: SH
  6. Install the generator bracket.
  7. Install the ignition control module bracket.

    8. Tighten
    Tighten the ignition control module bracket bolts to 50 N·m (37 lb ft).

  8. Install the ignition control module and nuts.

    9. Tighten
    Tighten the ignition control module nuts to 30 N·m (22 lb ft).


    Object Number: 566982 Size: SH
  9. Install engine lift hook bolt.

    10. Tighten
    Tighten the engine lift hook bolt to 25 N·m (18 lb ft).

Lower Intake Manifold Installation L36, C, H, W


    Object Number: 44774 Size: SH
  1. Clean the lower intake manifold sealing surface using GM P/N 12346139 (Canadian P/N 10953463) or equivalent prior to installing any seals or gaskets.
  2. Install the lower intake manifold gasket.
  3. Install the lower intake manifold.
  4. Apply threadlocker 272 GM P/N United States 12345493, GM P/N Canada 10953488 or the equivalent to the bolt threads.

    5. 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.

  5. Install the lower intake manifold bolts.

    6. Tighten
    Tighten the lower intake manifold bolts in sequence to 15 N·m (11 lb ft).


    Object Number: 36667 Size: SH
  6. Install the EGR outlet pipe to the intake manifold.
  7. Install the EGR outlet pipe bolt.

    8. Tighten
    Tighten the EGR outlet pipe bolt to 29 N·m (21 lb ft).

Lower Intake Manifold Installation L67, C, H, W


    Object Number: 154536 Size: SH
  1. Clean the lower intake manifold sealing surface using GM P/N 12346139 (Canadian P/N 10953463) or equivalent prior to installing any seals or gaskets.
  2. Install the lower intake manifold gasket.
  3. Install the lower intake manifold.
  4. Apply Threadlocker 272 GM P/N United States 12345493, GM P/N Canada 10953488 to the bolt threads.

    5. Object Number: 211918 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.

  5. Install the lower intake manifold bolts including the two hidden bolts.

    6. Tighten
    Tighten the bolts in sequence to 15 N·m (11 lb ft).


    Object Number: 36667 Size: SH
  6. Install the EGR outlet pipe to the intake manifold.
  7. Install the EGR outlet pipe bolt.

    8. Tighten
    Tighten the EGR outlet pipe bolt to 29 N·m (21 lb ft).