The inline fuel filter is located on the fuel feed pipe before the fuel injection system and mounted directly in front of the rear axle. The filter housing is constructed of steel with quick-connect inlet and threaded outlet fittings. The threaded fitting is sealed with an O-ring. In order to disengage quick-connect fittings, a fuel line quick-connect separator tool set, such as J-37088-A or equivalent, is required. There is no manufacturer set service interval for fuel filter replacement. We suggest replacing the filter every 30-40 thousand miles.
- Before servicing the vehicle, refer to the Precautions Section.
- Relieve the fuel system pressure.
Clean both the inlet and the outlet fittings on the fuel filter.
Disengage the quick-connect fittings at the fuel filter inlet as follows:
- Slide the dust covers from the quick-connect fittings.
- Grasp both sides of the fitting. Twist the female connector 1 / 4 turn in each direction to loosen any dirt within the fitting. Using compressed air and safety glasses, blow any accumulated dirt out of the fitting.
- If equipped with the plastic hand releasable fitting, squeeze the plastic retainer release tabs and pull the connection apart.
- If equipped with metal fittings, choose the correct size quick release tool and insert the tool into the female connector, then push inward to release the locking tabs. Pull the connector apart.
- Use a clean lint free rag to clean male pipe ends. Inspect both ends of the fitting for dirt and burrs. Clean or replace components as required. If it is necessary to remove rust or burrs from the fuel pipe, use emery cloth in a radial motion with the pipe end to prevent damage to the O-ring sealing surface.
- Remove the threaded outlet fitting from the chassis fuel pipe. Slide the fuel filter from the bracket.
- Inspect the fuel pipe O-ring for cuts, nicks, swelling or distortion. Replace if necessary.
- Slide the fuel filter into the bracket.
- Tighten the outlet fitting to the chassis fuel pipe. Torque the fitting to 22 ft. lbs. (30 Nm).
Engage the quick-connect inlet fitting as follows:
- Apply a few drops of clean engine oil to the male pipe end. This will ensure proper reconnection and prevent a possible fuel leak.
- Push both sides of the fitting together to cause the retainer tabs to snap in place. Once installed, pull on both sides of the fitting to ensure connection is secure.
- Reposition dust cover over the quick-connect fitting.
- Tighten the fuel filler cap.
- Confirm that the ignition is in the OFF position. Connect the negative battery cable.
- Pressurize the fuel system by cycling the ignition without attempting to start the engine. Turn the ignition switch to the ON position for 2 seconds, then turn to the OFF position for 10 seconds. Again, turn to the ON position and check for fuel leaks.