Your 1989 Chevrolet Corvette uses an inline fuel filter, which takes a special wrench to replace. Using a conventional wrench may damage the retaining nut and force you to replace the whole fuel line. Still, you can replace the filter in your driveway following some simple guidelines in a matter of minutes.
Tools Used: Wrench, Fuel pressure gauge (J-34730-1 or equivalent), Shop rag, Fuel-approved container, Floor jack, Jack stand, Flare wrench, Standard screwdriver, Ratchet, Socket, Replacement fuel line O-rings (2)
Replace a Fuel Filter
Relieving the Fuel System Pressure
Detach the negative (black) battery cable using a wrench.
Loosen the filler cap.
Connect fuel pressure gauge J-34730-1 or equivalent to the fuel pressure test valve on the fuel rail. Cover the valve with a shop rag, as you connect the gauge, to prevent fuel from splashing over the engine.
Insert the end of the bleeder hose on the gauge into a fuel-approved container.
Open the gauge valve to relieve the fuel pressure on the line. Then close the valve and remove the fuel pressure gauge from the test valve.
Removing the Fuel Filter
Lift the rear, passenger side wheel/tire assembly using a floor jack and place a jack stand under the frame for support.
Locate the fuel filter on the rear cross-member in front of the fuel tank.
Unfasten the inlet and outlet fuel lines from the filter using a flare wrench. Hold the filter in place using a back up wrench to hold the filter as you unscrew the line with the flare wrench. Discard the O-rings from the fuel lines.
Loosen the clamp holding the fuel filter in place using a standard screwdriver. Or remove the filter and mounting bracket using a ratchet and socket.
Remove the fuel filter from the vehicle.
Installing the New Filter
Position the new filter on the holding clamp or mounting bracket. Make sure the arrow on the filter points to the line running towards the engine.
Tighten the holding clamp using the standard screwdriver or the mounting bracket using the wrench or ratchet and socket.
Install new O-rings on the fuel lines, then connect the inlet and outlet lines to the filter fittings by hand. Tighten the line retainer nuts on the inlet and outlet fuel lines using the flare wrench as you hold the filter in place with the back up wrench.
Lower the vehicle with the floor jack.
Tighten the fuel filler cap.
Attach the negative (black) battery cable using the wrench.
Turn the ignition key to the "On" position to pressurize the fuel system.
Start the engine and apply the parking brake.
Check for fuel leaks at the fuel filter then turn off the engine.
Tips & Warnings
When working on the fuel system of your Corvette, do not smoke around the vehicle. Park it away from appliances with open flames, such as a dryer or water heater. Fuel vapors are extremely volatile, and a nearby flame may ignite the gasoline.
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