Fuel Rail and Injectors Installation

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

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.

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 .

Fig 1: Installing Fuel Rail, With Fuel Injectors, Into Intake Manifold
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the fuel rail bolts.
Tighten
1. 7.1. Tighten the fuel rail bolts to 10 N.m (89 lb in).
2. 7.2. Tighten the crossover tube right side retaining bolt to 3.8 N.m (34 lb in).
Install the fuel rail stop bracket and bolt.
Tighten

Tighten the fuel rail stop bracket bolt to 50 N.m (37 lb ft).

Fig 2: Installing Fuel Rail Stop Bracket & Bolts
Courtesy of GENERAL MOTORS CORP.