|Locate, Replace, Test|
The first step in replacing the fuel filter is finding it. Location and
placement of fuel filters run from obvious to insidious. In addition to the
main filter, there are often secondary inline filters and even a sock filter
that wraps itself around the foot of the fuel pickup inside the fuel tank.
It's a good bet to check and replace all fuel system filters at the same time.
Before replacing the fuel filter, the fuel system pressure must be relieved of
residual pressure. Consult the vehicle service manual for the proper procedure.
When replacing the high-pressure fuel filter, always use new copper gaskets on
all fittings to prevent leaks. The copper gaskets are designed to seal only
once. Make certain the fuel filter is installed in the correct direction of
flow if applicable. When changing out the fuel filter, also inspect the
surrounding high-pressure lines for wear and replace if required. Getting the
correct torque on the fittings that fasten the fuel lines to the filter is
key. Since fuel filters are often in tight spots, a good selection of wrenches
can help put a positive spin on a job well done. Compared to the cost of new
fuel injectors, a few wrenches and a fuel filter are a small price to pay.
|Step 1 - Locate the fuel filter. Relieve fuel system pressure. Remove
fuel line fittings.
|Step 2 - Some fuel filters are directional. In this case the previous
filter was installed backwards. Make certain that IN and OUT are in the right
|Step 3 - Always use new copper replacement gaskets on all fuel fittings.
|Step 4 -Â Make any final adjustments. Double-check all fittings and
|Step 5 - Obstruction wrenches can help put the final twist on fuel
fitting fasteners. Test for leaks before driving vehicle.