Fuel Tank: Description
The plastic fuel tank is mounted to the frame rails under the left/center side of the vehicle. The fuel tank contains a serviceable fuel pump module with an electric fuel pump, and a fuel level sending unit. The tank is also equipped with 2 fuel lines: a fuel supply line to the fuel pump, and a separate fuel return line. See Fig 1.
Fuel Temperature Control: A section of the fuel return line is coiled at the rear section of the tank. See Fig 2. This coiled section is used to help drop the temperature of fuel returning to the tank. A thermostat (preheating valve) (3) is used to keep fuel temperature below 167 degrees F. If fuel temperature is above 167 degrees F, fuel passes first through the coiled cooler lines, and then into the fuel tank. If fuel temperature is below 150 degrees F, fuel bypasses the coiled cooler lines, and is returned directly into the fuel tank. See Fig 2.
An electric fuel pump (more commonly referred to in diesel applications as a fuel transfer pump or fuel lift pump) is attached to the fuel pump module. This module is located in the fuel tank. Refer to FUEL PUMP MODULE for additional information. See Fig 3.
| 1 - Strap Bolts (2) |
| 2 - Hose (not with all engines) |
| 3 - Fuel Outlet Line |
| 4 - Fuel Return Line |
| 5 - Plug |
| 6 - Fuel Tank |
| 7 - Tank Straps (2) |
| 8 - Nuts (2) |
| 9 - Filler Tube |
| 10 - Vent Hose |
| 11 - Hose |
| 12 - Clamps |
| 13 - Cushioning Material |
| 14 - Two-Way Valve |
| 1 - Expansion Tank |
| 2 - Top of Tank |
| 3 - Thermostat (Preheating Valve) |
| 4 - Cooler Lines |
| 5 - Connecting Hoses/Clamps |
| 1 - Cooler Lines |
| 2 - Top of Tank |
| 3 - Expansion Tank |
| 4 - Check Valves |
| 5 - Check Valve |
| 6 - Module Lock Ring |
| 7 - Fuel Pump Module |