Next you will reinstall the filter bypass spring into the filter cavity. The spring is here to allow fuel to bypass the filter and allow fuel to enter the float bowl should the filter become clogged.

The final step is to carefully reinstall the filter and inlet fitting assembly. A drop of oil on the inlet fitting threads is a good idea, and you must make certain the bypass spring does not get turned sideways in the cavity as you compress it to start the threads. ALWAYS start the fitting by hand for 2-3 turns, then you can use a wrench to fully tighten the fitting.

And there you have it, that's all there is to replacing a fuel filter. Again, I personally recommend that fuel filters should be replaced once a year regardless of how often the vehicle is in use. Condensation and certain additives can quickly foul a filter, so they should be considered a routine maintenence item. Besides, they're cheap insurance compared to the cost of a full rebuild if a carb gets fouled by dirty fuel and debris.

To print a copy of this aticle or save a copy for reference please click on this link: Holley Filters PDF.