GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Cavalier (CNG) 🢒 Engine 🢒 Engine Controls - 2.2L 🢒 Fuel Hose/Pipe Replacement - Low Pressure Lock-Off Union to Low Pressure Lock-Off

Removal Procedure

Tools Required

J 41416 Ultrasonic Leak Detector


    Object Number: 401924 Size: SH
  1. Relieve the CNG fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the battery. Refer to Battery Cable Replacement -- Auxiliary in Engine Electrical in the 1998 J Platform Service Manual.
  3. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls -- 2.2L in the 1998 J Platform Service Manual.
  4. Disconnect the fuel line (1) at the low pressure lock-off (LPL).

    5. Object Number: 401921 Size: SH
  5. Disconnect the fuel line at the union (1). Discard the O-ring face seal.
  6. Remove the fuel line from the clips on the back of the fuel rail.
  7. Remove the fuel line.

Installation Procedure

    Object Number: 401921 Size: SH
  1. Route the fuel line through the engine clips.

    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. Connect the fuel line to the union (1) using a new O-ring face seal. Lubricate the O-ring with petroleum jelly or the equivalent.

    3. Tighten
    Tighten the fuel line fitting to 24 N·m (18 lb ft).


    Object Number: 401924 Size: SH
  3. Connect the fuel line (1) to the LPL using a new O-ring face seal. Lubricate the O-ring with petroleum jelly or the equivalent.

    4. Tighten
    Tighten the fuel line fitting to 24 N·m (18 lb ft).

  4. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls -- 2.2L in the 1998 J Platform Service Manual.
  5. Install the battery. Refer to Battery Cable Replacement -- Auxiliary in Engine Electrical in the 1998 J Platform Service Manual.
  6. Start the engine. Inspect for CNG fuel leaks at each serviced fitting using the J 41416 .