GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Fuel Filter

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REMOVAL & INSTALLATION



Gasoline Engines
CARBURETORS

See Figure 1

An internal filter is located in the inlet fitting of all carburetors. The elements are spring loaded and are held against the inlet fitting gasket surface.

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the fuel line at the fuel inlet filter nut. Remove the inlet filter nut, the filter and the spring.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Removing an internal fuel filter on a carbureted engine

To install:
  1. Install a new filter (with the check valve end facing the fuel line), the spring, the gasket and the fuel line nut.
  2.  
  3. Torque the fuel filter nut to 18 ft. lbs. (24 Nm), then install the fuel line.
  4.  
  5. Connect the negative battery cable. Check for leaks.
  6.  

FUEL INJECTED

See Figure 2

On throttle body vehicles, there are two kinds of in-line filters available. From 1982-85 the filter is located in the engine compartment. From 1986 the filter is located to the left of the fuel tank. On the MFI engines, the filter is located on the left side of the fuel tank also.

  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. For engines other than early TBI with an engine compartment mounted filter, raise and safely support the vehicle.
  6.  
  7. Remove the filter bracket attaching screw(s) and filter bracket.
  8.  
  9. Grasp the filter and 1 fuel line fitting. Twist the quick-connect fitting 1 / 4 turn in each direction to loosen any dirt within the fitting. Repeat for the other fuel line fitting.
  10.  
  11. Use compressed air, blow out dirt from the quick-connect fittings at both ends of the fuel filter.
  12.  


CAUTION
Always wear safety goggles when using compressed air.

  1. To disconnect the fuel line fittings, squeeze the plastic tabs on the male end of the connector and pull the fitting apart. Repeat for the other fitting.
  2.  
  3. Remove the fuel filter.
  4.  



Click image to see an enlarged view

Fig. Fig. 2: TBI fuel filter assembly in the engine compartment

To install:
  1. Remove the protective caps from the new filter.
  2.  
  3. Connect the filter retainers on the filter inlet and outlet pipes.
  4.  
  5. Install the filter and quick-connect fittings.
  6.  
  7. On rear mounted filters, align the filter bracket on the frame, then attach with mounting screw(s).
  8.  
  9. Lower the vehicle, if raised. Tighten the fuel filler cap.
  10.  
  11. Connect the negative battery cable.
  12.  
  13. Turn the ignition ON and inspect for leaks.
  14.  
  15. Reset the clock, radio and any other accessories if required.
  16.  

Diesel Engines

See Figure 3

The fuel filter is located on the left fender front wheel house.

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the fuel lines from the inlet and the outlet ports. Disconnect the drain hose and, if equipped, the electrical harness at the filter.
  4.  
  5. Remove the filter assembly clamp-to-bracket bolts and the clamp. Rotate the filter assembly to disengage it from the bracket, then remove the filter assembly.
  6.  
  7. Cover the assembly with a cloth and clamp it in a vise (using the line openings and the flat on the opposite side.)
  8.  



Click image to see an enlarged view

Fig. Fig. 3: Exploded view of the diesel engine fuel filter assembly

  1. Remove the filter and clean the gasket mounting surface.
  2.  
  3. Coat the new filter gasket with engine oil or diesel fuel. Install the filter on the cover and tighten it to 2 / 3 turn beyond the gasket contact.
  4.  
  5. Place the assembly into the bracket and engage the lock tab into the bracket. Install new O-rings and loosely attach the fuel lines to the unit.
  6.  
  7. To complete the installation, reverse the removal procedures.
  8.  
  9. Open the air bleed screw, turn the ignition switch to the RUN position (the pump will run) and close the air bleed screw when fuel flows from the opening.
  10.  
  11. Connect the negative battery cable.
  12.  
  13. Start the engine and check for leaks.
  14.  
  15. Reset the clock, radio and any other accessories if required.
  16.  

The inline filter should be changed when changing the fuel filter.

WATER IN FUEL

CAUTION
The water/diesel fuel mixture is flammable, and could be HOT. When opening the drain valve, do not touch the fuel coming out. Most of all do not expose the fuel to open flames or sparks.

The system has a red WATER IN FUEL warning light which is designed to come on to warn of excessive water in the system. It will also come ON as you start your vehicle to let you know the bulb is working. If the light comes on at any other time, there is water in the fuel, (and possibly other contaminants). You must drain the system within one hour of operation after the light comes ON.


WARNING
Continuing to drive the vehicle with the warning light on can result in serious damage to the fuel injection system or other parts of the engine.

If the light comes on after a few minuets after refueling, this means water has entered the tank. Turn the engine OFF and remove the water immediately.

  1. Stop and park the vehicle in a safe place. Turn the engine OFF and apply the parking brake.
  2.  
  3. Turn the key to the RUN position, but do not start the engine. This will engage the electric fuel pump.
  4.  
  5. Open the hood.
  6.  
  7. The drain valve is on the driver's side of the engine compartment. Place a fuel-resistant container under the vehicle's drain valve.
  8.  
  9. Open the valve a full two turns, then push the button on the fuel filter (located on the driver's side of the engine, at the front). Fuel and water should begin flowing out from the drain valve.
  10.  
  11. Hold in the button until the liquid coming from the valve looks like clean fuel. This can take about 15-20 seconds.
  12.  
  13. Release the button and close the valve tightly. Dispose of the mixture in a suitable manner.
  14.  

If the warning light does not go out after draining, or it comes back on within seconds after repeated drainings, turn the engine OFF and see an authorize service station immediately.

 
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