MODULE - FUEL TANK
DESCRIPTION
The fuel tank module (2) is installed in the top of the fuel tank. The fuel tank module contains the following components:
- Fuel reservoir
- A separate in-tank fuel filter
- Fuel gauge sending unit (fuel level sensor)
- A special lockring (1) to retain module to fuel tank
- Fuel supply line connections
- Fuel return line connections
A separate electric fuel pump (sometimes referred to as a low-pressure fuel transfer or lift pump) is not attached to the fuel tank module. Instead, a gear supply pump is mounted to the rear of the high-pressure fuel injection pump. This supply pump draws fuel under a vacuum; through the fuel filter; and from the fuel tank. Refer to Fuel Injection Pump for additional information.
REMOVAL
The fuel tank module (2) is located on top of the fuel tank.
1. Drain and remove fuel tank. Refer to Fuel Tank Removal/Installation.
2. Note rotational position of module before attempting removal. An indexing arrow is located on top of module for this purpose.
3. Position Special Tool 9340 (3) into notches on outside edge of lockring (5).
4. Install 1/2 inch drive breaker bar (1) to tool 9340 (3).
5. Rotate breaker bar counter-clockwise to remove lockring.
6. Remove lockring. The module will spring up slightly when lockring is removed.
7. Remove module from fuel tank. Be careful not to bend float arm while removing.
INSTALLATION
CAUTION: Whenever the fuel pump module is serviced, the rubber seal (gasket) must be replaced.
1. Using a new seal (gasket), position fuel tank module into opening in fuel tank.
2. Position lockring (5) over top of fuel pump module.
3. Rotate module until embossed alignment arrow points to center alignment mark. This step must be performed to prevent float from contacting side of fuel tank. Also be sure fuel fitting on top of pump module is pointed to front of vehicle.
4. Install Special Tool 9340 (3) to lockring.
5. Install 1/2 inch drive breaker (1) into Special Tool 9340 (3).
6. Tighten lockring (clockwise) until all seven notches have engaged.
7. Install fuel tank. Refer to Fuel Tank Removal/Installation.