Fuel Rail and Injectors Installation
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
Press evenly on both sides of the fuel rail until all of the injectors are seated in their bores.
- 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 Sealers, Adhesives, and Lubricants .
- Install the fuel rail bolts.
Tighten:
- 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 vacuum hose to the fuel pressure regulator for the L59 engine.
- Install the fuel rail stop bracket and bolt.
Tighten: Tighten the fuel rail stop bracket bolt to 50 N.m (37 lb ft).
CAUTION:
Refer to Fuel Rail Stop Bracket Installation Caution
in Cautions and Notices.
IMPORTANT:
DO NOT use the fuel injector O-ring seals again. Install NEW fuel injector O-ring seals during assembly.
NOTE:
Refer to Fastener Notice
in Cautions and Notices.