GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2001 🢒 Regal (China) 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Fuel Pipes and Fuel Rail Installation

    Object Number: 660459 Size: SH
  1. Install the right fuel rail.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the right fuel rail mounting bolts.

    3. Tighten
    Tighten the right fuel rail mounting bolts to 25 N·m (18 lb ft).


    Object Number: 660456 Size: SH
  3. Install the left fuel rail.
  4. Install the left fuel rail mounting bolts.

    5. Tighten
    Tighten the left fuel rail mounting bolts to 25 N·m (18 lb ft).


    Object Number: 660502 Size: SH

    Caution: Improper torque methods of the fuel lines will result in fuel leaks and possible damage to the engine. Failure to follow proper fuel line fitting torque methods could result in serious personal injury.

  5. Install the injection pipes to the right bank.

    6. Tighten
    Tighten the injection pipes to 41 N·m (30 lb ft)

  6. Install the anti-rotation locks to the right bank injection pipes.

    7. Tighten
    Tighten the anti-rotation lock screws to 4 N·m (35 lb in)


    Object Number: 660451 Size: SH

    Caution: Improper torque methods of the fuel lines will result in fuel leaks and possible damage to the engine. Failure to follow proper fuel line fitting torque methods could result in serious personal injury.

  7. Install the injection pipes to the left bank.

    8. Tighten
    Tighten the injection pipes to 41 N·m (30 lb ft)

  8. Install the anti-rotation locks to the left bank injection pipes.

    9. Tighten
    Tighten the anti-rotation lock screws to 4 N·m (35 lb in)


    Object Number: 660449 Size: SH
  9. Install the fuel pipes and function block assembly.

    10. Object Number: 755240 Size: SH
  10. Install the fuel pressure limiting valve bracket nut.

    11. Tighten
    Tighten the fuel pressure limiting valve bracket nut to 10 N·m (89 lb in).

  11. Install the fuel return line clamp bolt and clamp.

    12. Tighten
    Tighten the fuel return line clamp bolt to 10 N·m (89 lb in).


    Object Number: 660438 Size: SH
  12. Install the right cylinder head return line eye bolt and gasket (2).

    13. Tighten
    Tighten the right cylinder head return line eye bolt to 17 N·m (12 lb ft).

  13. Install the right fuel rail high pressure line (1).

    14. Tighten

        • Tighten the high pressure line to right fuel rail nut to 41 N·m (30 lb ft).
        • Tighten the high pressure line to function block nut to 41 N·m (30 lb ft).

    Object Number: 660446 Size: SH
  14. Install the left cylinder head return line eye bolt and gasket (2).

    15. Tighten
    Tighten the left cylinder head return line eye bolt to 17 N·m (12 lb ft).

  15. Install the left fuel rail high pressure line (1).

    16. Tighten

        • Tighten the high pressure line to left fuel rail nut to 41 N·m (30 lb ft).
        • Tighten the high pressure line to function block nut to 41 N·m (30 lb ft).

    Object Number: 755237 Size: SH
  16. Install the fuel inlet pipe and function block.
  17. Install the function block nuts.

    18. Tighten
    Tighten the function block nuts to 25 N·m (18 lb ft)


    Object Number: 755230 Size: SH
  18. Install the fuel inlet to fuel return line clamp.
  19. Install the fuel inlet to fuel return line clamp bolt.

    20. Tighten
    Tighten the fuel inlet to fuel return line clamp bolt to 21 N·m (15 lb ft).


    Object Number: 660439 Size: SH
  20. Install the fuel inlet distribution block to the fuel return distribution block.
  21. Install the fuel inlet distribution block bolt and nut.

    22. Tighten
    Tighten the fuel inlet distribution block bolt and nut to 25 N·m (18 lb ft).


    Object Number: 660448 Size: SH
  22. Install the fuel injection pump high pressure line to the fuel injection pump.

    23. Tighten
    Tighten the high pressure line to 41 N·m (30 lb ft).

  23. Install the fuel return hose and clamp to the fuel injection pump.
  24. Install the fuel inlet hose and clamp to the fuel injection pump.