Fuel Rail and Injectors Installation

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.

Fig 1: View Of Fuel Rail W/Injectors
Courtesy of GENERAL MOTORS CORP.

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 .

NOTE: Refer to Fastener Notice .

Install the fuel rail bolts.
Tighten:
1. Tighten the fuel rail bolts to 10 N.m (89 lb in).
2. 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.

Fig 2: View Of Fuel Rail Stop Bracket & Bolt
Courtesy of GENERAL MOTORS CORP.

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