Tools Required

J 41416 Ultrasonic Leak Detector

1. Relieve the CNG fuel system pressure. Refer to Fuel Pressure Relief .

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

2. Disconnect the negative battery cable.
3. Remove the fuel line clamp.
4. Disconnect the fuel line at the low pressure regulator (LPR) (1). Discard the O-ring.
5. Disconnect the fuel line at the low pressure lock-off (LPL) (2). Discard the O-ring
6. Remove the fuel line.

1. Install the fuel line.

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 at the LPL (2) and the LPR (1) using a new O-ring face seal. Lubricate the O-ring with petroleum jelly or the equivalent.

Tighten
Tighten both fuel line fittings to 24 N·m (18 lb ft).

3. Install the fuel line clamp.

Tighten
Tighten the clamp to 12 N·m (106 lb in).

4. Connect the negative battery cable.

Tighten
Tighten the bolt to 15 N·m (11 lb ft).

5. Start the engine. Inspect for CNG fuel leaks at each serviced fitting using the J 41416 .