Intake Manifold Installation Upper-L65

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.

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.

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




6. Install the clamp for the turbocharger connector hose.

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

Intake Manifold Installation L57, L65

1. Install the intake manifold and gaskets.




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.

•	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).




3. Install the hoses and the clamps to the fuel filter assembly.



4. Install the fuel filter assembly and the engine wiring harness bracket.

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

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.

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.

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




8. Install the clamp for the turbocharger connector hose.

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