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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1168 (Engine Controls - 6.0L - Alternative Fuels (Introduction)) >> Repair Instructions >> Fuel Rail Assembly Replacement (KL6) >> Assembly Procedure

Assembly Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying CNG Fuel Rail Pressure Sensor
    GM758213Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Compressed Natural Gas (CNG) O-Ring Caution in Cautions and Notices.
  1. Install the CNG fuel rail pressure sensor or the temperature sensor (2) into the fuel rail (4) with new O-rings (3). Lubricate the new O-rings with petroleum jelly.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the fuel rail pressure sensor or the temperature sensor hold down (5) and bolt (6).

    Tighten:  Tighten the bolt to 3.8 N.m (34 lb in).

    3. Fig 2: Identifying Fuel Injector Connectors
    GM757006Courtesy of GENERAL MOTORS CORP.
  3. Install the CNG fuel injector (5) into the fuel rail (3, 4) with a new O-ring. Lubricate the new O-ring with petroleum jelly.
  4. Install the fuel injector retainer clip.
  5. Lubricate the new injector tip O-ring with clean engine oil.
  6. Repeat steps 3, 4 and 5 for the remaining CNG fuel injectors.
    7. Fig 3: View Of Fuel Injector, Clip & O-Rings
    GM351185Courtesy of GENERAL MOTORS CORP.
  7. Lubricate the new lower injector O-ring seals (4) with clean engine oil.
  8. Install the new O-ring seals (4) on the spray tip end of each fuel injector (3).
  9. Install the gasoline fuel injector into the fuel rail.
  10. Install the fuel injector retainer clip.
  11. Install the CNG fuel injector adapter to the end of the injector.
  12. Repeat steps 7, 8, 9, 10 and 11 for the remaining injectors.
    13. Fig 4: Identifying Fuel Rail Assembly Components
    GM798436Courtesy of GENERAL MOTORS CORP.
  13. Assemble the CNG fuel rail (1, 4) injectors into the CNG fuel injector adapters (6).
    14. Fig 5: Exploded View Of Fuel Rails & Injector Components
    GM350543Courtesy of GENERAL MOTORS CORP.
  14. Install new O-rings on the crossover tube (25).
  15. Lubricate the new O-rings with clean engine oil.
  16. Install the crossover tube (25) into the fuel rails (14, 15).
  17. Loosely install the crossover tube fuel rail retainers (5, 21).
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