GM Corvette 1984-1996 Repair Guide

Fuel Filter

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REMOVAL & INSTALLATION



The fuel filter is located in the fuel feed line attached to the frame rail, at the rear of the vehicle. The fuel filter is a threaded fitting type.


CAUTION
Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion. To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before servicing any fuel system component. If this procedure is not performed, fuel may be sprayed out of the connection under pressure. Cover fuel hose connections with a shop towel before disconnecting to catch any residual fuel that may still be in the line. Always keep a dry chemical (Class B) fire extinguisher near the work area.

1984-92 Vehicles

See Figures 1, 2, 3 and 4

  1. Properly relieve the fuel system pressure, as outlined in Fuel System of this repair guide.
  2.  
  3. If not already done, disconnect the negative battery cable.
  4.  
  5. Raise and safely support the vehicle.
  6.  



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Fig. Fig. 1: Fuel filter location and mounting-1986 vehicle shown, other years similar

  1. Unfasten the fuel filter attaching screws, then remove the fuel filter shield.
  2.  
  3. Thoroughly clean the area around all in-line fuel filter connections and surrounding areas before disconnecting to avoid possible contamination of the fuel system.
  4.  
  5. Using a back-up wrench to avoid warping the lines, disconnect the fuel feed pipes from the filter.
  6.  



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Fig. Fig. 2: ALWAYS use a back-up wrench when loosening the fuel feed pipes from the filter

  1. Unfasten the fuel filter attaching screw and remove the fuel filter from the vehicle. Check the fuel pipe O-rings for cuts, nicks swelling or distortion. Replace, if necessary.
  2.  



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Fig. Fig. 3: Remove the fuel filter attaching bolt, then remove the fuel filter from the vehicle



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Fig. Fig. 4: Exploded view of the in-line fuel filter assembly-1984-92 vehicles

To install:
  1. Loosely install the new fuel filter and secure with the attaching screw.
  2.  
  3. Attach the fuel feed pipes to the fuel filter. Using back-up wrench, tighten the fitting to 20-22 ft. lbs. (27-30 Nm).
  4.  
  5. Tighten the fuel filter attaching screw to 53 inch lbs. (6 Nm).
  6.  
  7. Install the fuel filter shield and secure with the attaching screw.
  8.  
  9. Carefully lower the vehicle.
  10.  
  11. Add fuel, if necessary, and tighten the fuel filler cap.
  12.  
  13. Connect the negative battery cable. Turn the ignition switch ON for 2 seconds, then turn OFF for 5 seconds. Turn the ignition switch to the ON position again, and check for fuel leaks.
  14.  

1993-96 Vehicles

See Figures 5, 6 and 7

There is no service interval for replacing the fuel filter. Only replace a filter that is restricted. Check the fuel tank internally and clean it a restricted fuel filter is found. Fuel tank removal and installation is outlined in Fuel System of this guide.

  1. Properly relieve the fuel system pressure, as outlined in Fuel System of this repair guide.
  2.  
  3. If not already done, disconnect the negative battery cable.
  4.  
  5. Remove the fuel pipe retaining nut from the A/C evaporator and blower module stud.
  6.  



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Fig. Fig. 5: Unfasten the fuel line nut (4) from the evaporator and blower module stud (5)

  1. Raise and safely support the vehicle.
  2.  
  3. On convertibles, remove the lower underbody brace bolts and nuts, then remove the underbody brace.
  4.  



Click image to see an enlarged view

Fig. Fig. 6: On convertibles, you must remove the retainers and the underbody brace

  1. Unfasten the chassis fuel pipe retaining nuts.
  2.  
  3. Thoroughly clean the area around all in-line fuel filter connections and surrounding areas before disconnecting to avoid possible contamination of the fuel system.
  4.  
  5. Using a back-up wrench to avoid warping the lines, disconnect the fuel inlet pipe from the filter.
  6.  
  7. Reposition the inlet pipe for access to the fuel filter. Drain any remaining fuel into an approved container.
  8.  
  9. Unfasten the filter attaching screw and the fuel filter bracket.
  10.  



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Fig. Fig. 7: Exploded view of the fuel filter attachment

  1. Hold the pipe outlet nut stationary, then turn the fuel filter to remove it.
  2.  
  3. Check the fuel pipe O-rings for cuts, nicks, swelling or distortion and replace the O-rings as necessary.
  4.  

To install:
  1. Loosely install the new fuel filter on the outlet side fuel pipe.
  2.  
  3. Install the inlet nut to the filter and tighten to 20 ft. lbs. (27 Nm).
  4.  
  5. Install the fuel filter bracket and secure with the retaining screw. Tighten the screw to 53 inch lbs. (6 Nm).
  6.  
  7. Install the chassis fuel pipe retaining nuts and tighten to 40 inch lbs. (4.5 Nm).
  8.  
  9. For convertibles, install the lower underbody brace and secure with the retaining bolts and nuts, then tighten the nuts to 20 ft. lbs. (27 Nm). and the underbody brace bolt to 46 ft. lbs. (53 Nm).
  10.  
  11. Carefully lower the vehicle.
  12.  
  13. Install the fuel feed retaining nut to the A/C evaporator and blower motor. Tighten the fuel pump retaining nut to 40 inch lbs. (4.5 Nm).
  14.  
  15. Add fuel, if necessary, and tighten the fuel filler cap.
  16.  
  17. Connect the negative battery cable. Turn the ignition switch ON for 2 seconds, then turn OFF for 5 seconds. Turn the ignition switch to the ON position again, and check for fuel leaks.
  18.  

 
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