- Lubricate the NEW fuel injector O-ring seals with clean engine oil.
- Install the O-ring seals onto the fuel injectors.
- Install a new O-ring seal to the right side of the crossover tube.
- Assemble the crossover tube and bolt to the right fuel rail.
- Install the fuel rail, with fuel injectors, into the intake manifold.
- Apply a 5 mm (0.2 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads of the fuel rail bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers .
- Install the fuel rail bolts.
- Tighten the fuel rail bolts to 10 N·m (89 lb in).
- Tighten the crossover tube right side retaining bolt to 3.8 N·m (34 lb in).
- Install the fuel rail stop bracket and bolt.
Caution: Refer to Fuel Rail Stop Bracket Installation Caution in the Preface section.
Important: DO NOT use the fuel injector O-ring seals again. Install NEW fuel injector O-ring seals during assembly.
Press evenly on both sides of the fuel rail until all of the injectors are seated in their bores.
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
Tighten the fuel rail stop bracket bolt to 50 N·m (37 lb ft).
