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Makes 🢒 Generic 🢒 1998 🢒 Unit Repair 🢒 Engine 🢒 Engine Mechanical - 6.5L 🢒 Intake Manifold Installation

Intake Manifold Installation L65-CMT


    Object Number: 68323 Size: SH
  1. Install the new gaskets onto the cylinder heads.
  2. Install the intake manifolds.

    3. Important: 

    1. Apply teflon sealer GM P/N 1236004 on the threads of the studs that are second to the end on both intake manifolds. There are a total of four studs which require the teflon sealer.
    2. Apply threadlocker GM P/N 12345493 on the threads of the remaining studs.

    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 intake manifold studs.

    4. Tighten
    Tighten the intake manifold studs, (from the center out,) to 42 N·m (31 lb ft).

  4. Install the miscellaneous brackets and fuel line brackets on the intake studs.
  5. Install the nuts for the brackets.

    6. Tighten
    Tighten the bracket nuts to 23 N·m (17 lb ft).


    Object Number: 68321 Size: SH
  6. Install the center intake manifold gaskets on the intake manifolds.
  7. Install the O-ring onto the turbocharger inlet housing.
  8. Lubricate the O-ring lightly with engine oil.
  9. Install the center intake manifold onto the right and the left intake manifolds and on the turbocharger inlet housing.
  10. Install the bolts to the center intake manifold.

    11. Tighten
    Tighten the center intake manifold bolts to 23 N·m (17 lb ft).

Intake Manifold Installation Upper-L65


    Object Number: 59749 Size: SH
  1. Apply the silicone sealant GM P/N 9985943, or equivalent to the turbocharger outlet.
  2. Install the intake manifold gasket.
  3. Slide the intake into the turbocharger outlet hose.
  4. Install the intake manifold.

    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 intake manifold bolts.

    6. Tighten
    Tighten the bolts to 23 N·m (17 lb ft).


    Object Number: 59746 Size: SH
  6. Install the clamp for the turbocharger connector hose.

    7. Tighten
    Tighten the connector hose clamps to 6 N·m (50 lb in).

Intake Manifold Installation L57, L65


    Object Number: 59835 Size: SH
  1. Install the intake manifold and gaskets.

    2. Object Number: 59761 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.

  2. Install the intake manifold bolts/studs and fuel line clips.
    3. • Use teflon sealer to seal the four bolts, numbers 9, 11, 13, and 15 that are exposed to the crankcase.
    • Apply threadlocker GM P/N 12345493 to the threads of the bolts and the studs that are not numbered 9, 11, 13, or 15.

    Tighten
    Tighten the intake manifold bolts/studs, in sequence, to 42 N·m (31 lb ft).


    Object Number: 59758 Size: SH
  3. Install the hoses and the clamps to the fuel filter assembly.

    4. Object Number: 59759 Size: SH
  4. Install the fuel filter assembly and the engine wiring harness bracket.

    5. Tighten
    Tighten the fuel filter mount bolts to 42 N·m (31 lb ft).

  5. If equipped, install the upper intake manifold. Refer to Intake Manifold Installation (Upper-L65)

Intake Manifold Installation Upper-L56


    Object Number: 59748 Size: SH
  1. Apply the silicone sealant GM P/N 9985943, or equivalent to the turbocharger outlet.
  2. Install the EGR tower gasket on the round center portion of the intake manifold.
  3. Install the intake manifold gasket.
  4. Slide the intake into the turbocharger outlet hose.
  5. Install the intake manifold.
  6. Install the EGR gasket and valve.

    7. 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.

  7. Install the intake manifold bolts.

    8. Tighten
    Tighten the bolts to 23 N·m (17 lb ft).


    Object Number: 59746 Size: SH
  8. Install the clamp for the turbocharger connector hose.

    9. Tighten
    Tighten the connector hose clamps to 6 N·m (50 lb in).