- Install the new gaskets.
- Install the lower intake manifold.
- Install the lower intake manifold bolts/studs and fuel line clips.
- Install the fuel filter assembly and the POE wiring harness bracket to the rear of the lower intake manifold.
- For the L56 model, install the EGR tower gasket on the round center portion of the upper intake manifold.
- Install the upper intake gasket.
- Install the upper intake manifold to the lower intake manifold.
- Slide the upper intake into the turbocharger outlet hose.
- Apply the silicone sealant GM P/N 9985943, or equivalent to the turbocharger outlet before you install the turbocharger outlet onto the upper intake manifold.
- For the L56 model, install the EGR gasket and valve.
- Install the mounting bolts.
- Install the clamp for the turbocharger connector hose.
| • | 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 lower intake manifold bolts/studs in order of the tightening sequence. |
| • | Tighten the lower intake manifold bolts/studs to 42 N·m(31 lb ft). |
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 fuel filter mount bolts to 42 N·m (31 lb ft).
Tighten
Tighten the nut and the bolts to 23 N·m (17 lb ft).
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 connector hose clamps to 6 N·m (50 lb in).
