Fuel Filter Replacement Passenger/Cargo

Tools Required

J 45878 Combustible Gas Detector

Caution: Natural gas is highly flammable. In order to reduce the risk of fire and personal injury, keep sparks, flames, and smoking materials away from the vehicle while you perform the Compressed Natural Gas (CNG) fuel system service.

Caution: The Compressed Natural Gas (CNG) system operates at pressures up to 24820 kpa (3600 psi). Relieve the CNG fuel system pressure before servicing CNG fuel system components in order to reduce the risk of fire and personal injury.

1. Relieve the CNG fuel system pressure. Refer to the 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. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical in the G/H Van Service Manual.



3. Remove the outlet line (2) from the filter.
4. Discard the copper sealing washer.
5. Remove the inlet line from the filter.
6. Discard the copper sealing washer.
7. Remove the filter hold down clamp bolt.
8. Remove the filter.

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.

1. Install the filter into the hold down clamp.

Tighten
Tighten the clamp bolt to 13 N·m (115 lb in).

2. Install the fuel outlet line fitting (2) to the filter with a NEW copper sealing washer.

Tighten
Tighten the line fitting to 37 N·m (27 lb ft).

3. Install the fuel inlet line fitting to the filter with a NEW copper sealing washer.

Tighten
Tighten the line fitting to 37 N·m (27 lb ft).

4. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical in the G/H Van Service Manual.
5. Prime the CNG fuel system by cycling the ignition ON and OFF several times.
6. Start the engine and use the J 45878 in order to inspect for CNG fuel system leaks at each serviced fitting.

Fuel Filter Replacement Cutaway

Tools Required

J 45878 Combustible Gas Detector

Caution: Natural gas is highly flammable. In order to reduce the risk of fire and personal injury, keep sparks, flames, and smoking materials away from the vehicle while you perform the Compressed Natural Gas (CNG) fuel system service.

Caution: The Compressed Natural Gas (CNG) system operates at pressures up to 24820 kpa (3600 psi). Relieve the CNG fuel system pressure before servicing CNG fuel system components in order to reduce the risk of fire and personal injury.

1. Relieve the CNG fuel system pressure. Refer to the 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. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical in the G/H Van Service Manual.



3. Remove the outlet line (3) from the filter.
4. Discard the copper sealing washer.
5. Remove the inlet line from the filter.
6. Discard the copper sealing washer.
7. Remove the filter hold down clamp bolt.
8. Remove the filter.

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.

1. Install the filter into the hold down clamp.

Tighten
Tighten the clamp bolt to 13 N·m (115 lb in).

2. Install the fuel outlet line fitting (3) to the filter with a NEW copper sealing washer.

Tighten
Tighten the line fitting to 37 N·m (27 lb ft).

3. Install the fuel inlet line fitting to the filter with a NEW copper sealing washer.

Tighten
Tighten the line fitting to 37 N·m (27 lb ft).

4. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical in the G/H Van Service Manual.
5. Prime the CNG fuel system by cycling the ignition ON and OFF several times.
6. Start the engine and use the J 45878 in order to inspect for CNG fuel system leaks at each serviced fitting.