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Home >> Hummer >> 2010 >> H3 V8-5.3L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Service and Repair >> Overhaul >> 87. Fuel Rail and Injectors Installation
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87. Fuel Rail and Injectors Installation




Fuel Rail and Injectors Installation




Warning: Refer to Fuel Rail Stop Bracket Installation Warning (Fuel Rail Stop Bracket Installation Warning).


Note: DO NOT use the fuel injector O-ring seals again. Install NEW fuel injector O-ring seals during assembly.

1. Lubricate the NEW fuel injector O-ring seals (532, 534) with clean engine oil.
2. Install the O-ring seals to the fuel injectors.
3. Install the fuel injectors (533) and retainers (521).




4. Install the fuel rail assembly (510) to the manifold. Push firmly on both sides of the rail until all the injectors have entered their bores.
5. 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 (Adhesives, Fluids, Lubricants, and Sealers).

Caution: Refer to Fastener Caution (Fastener Caution).

6. Install the fuel rail bolts (511) and tighten to 10 Nm (89 lb in).




7. Install the evaporative emission (EVAP) canister purge solenoid valve (730) and tubes (729, 735).




8. Install the fuel rail stop bracket and bolt and tighten to 50 Nm (37 lb ft).

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