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Home >> Buick >> 2011 >> LaCrosse CXS >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 3.6L - Repair Instructions >> Repair Instructions >> Fuel Feed Intermediate Pipe Replacement (LLT) >> Installation Procedure

Installation Procedure

  1. Lubricate the pipes with silicon free engine oil. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    2. Fig 1: Identifying High Pressure Pipe Fitting, Left Fuel Rail & High Pressure Fuel Pipe
    GM1977757Courtesy of GENERAL MOTORS CORP.
  2. Position the NEW high pressure fuel pipe (2) to the high pressure fuel pump fitting (1) and left fuel rail (3). hand tighten the fitting.
    3. CAUTION: Refer to Fastener Caution .
  3. Tighten the high pressure fuel pipe fitting.
    1. Tighten the fitting a first pass to 15 N.m (11 lb ft).
    2. Tighten the fitting a final pass to 30 N.m (22 lb ft).
    4. NOTE: If a fuel leak accrues at the high pressure fuel pump or the fuel rail, that component will need to be replaced.
  4. Inspect for leaks using the following procedure:
    1. Turn ON the ignition, with the engine OFF for 2 seconds.
    2. Turn OFF the ignition, for 10 seconds.
    3. Turn ON the ignition, with the engine OFF.
    4. Inspect for fuel leaks.
  5. Install the low side fuel pressure service port cap.
  6. Install the fuel tank cap.
  7. Install the high pressure pump shield. Refer to Fuel Pipe Shield Replacement (LLT)  or Fuel Pipe Shield Replacement (LF1) .
  8. Install the Intake manifold cover. Refer to Intake Manifold Cover Replacement .
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