How To Install Holley Carb Fuel Filters

Role of periodic carburetor maintenance involves replacing the fuel filter(s). I personally recommend replacing them once a year regardless of how ofttimes a vehicle gets driven.

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

On most Holley carburetors, the filters are located in a cavity within the float bowls just backside the fuel inlet fittings where the fuel lines attach to the float bowls. Removal & replacement is a relatively uncomplicated process, the simply potential issues are installing the components in an incorrect manner and damaging the fuel inlet threads (i.due east. cross-threading).

The following will guide you through the removal & reinstallation process for nearly Holley carburetors.

Beneath you will run across the bronze filter element which is partially visible through the fuel inlet opening in the fuel inlet fitting.

filteraf

Begin by carefully removing the fuel inlet fitting using the appropriately sized open-finish wrench. Near Holley carburetors (and many Quadrajets also) volition require a 1″ wrench. Be sure to use a quality wrench to avoid damaging the fitting.

filterbf

Below are all of the components as removed from the carburetor. From left to correct:
-Fuel inlet fitting
-Fuel filter gasket (small)
-Fuel inlet plumbing fixtures gasket (big)
-Filter element
-Filter bypass leap

filtercf

One time you have removed the former filter, clean the inlet fitting equally required and begin the reassembly process by placing the big gasket over the threads on the inlet fitting as seen below.

filterdf

Next, identify the small filter gasket into the fitting, making sure it sits flush into the crenel. I have the gasket propped up in the fitting hither just to make it easier to see.

filteref

Next you will install the filter element, making sure to install information technology in the right direction every bit seen here.

filterff

Next yous will reinstall the filter bypass spring into the filter cavity. The bound is here to allow fuel to bypass the filter and allow fuel to enter the float basin should the filter get clogged.

filtergf

The final step is to carefully reinstall the filter and inlet fitting associates. A drop of oil on the inlet plumbing fixtures threads is a skilful idea, and you must brand sure the bypass spring does not become turned sideways in the cavity as yous compress it to start the threads. ALWAYS start the fitting by hand for 2-iii turns, so you can use a wrench to fully tighten the fitting.

filterhf

And there y'all have it, that's all there is to replacing a fuel filter. Once again, I personally recommend that fuel filters should be replaced in one case a twelvemonth regardless of how often the vehicle is in utilize. Condensation and certain additives can rapidly foul a filter, so they should be considered a routine maintenence detail. Besides, they're inexpensive insurance compared to the cost of a total 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.