The Stovebolt Site Forums The Shop Area Engine Shop Fuel filter placement

'41 1/2 ton with '54 235: 1) Is it better to place a fuel filter between the tank and pump or before the carb? The tank's interior doesn't look that great so I'll have to use one of those refinishing kits. 2) After the line gets cut, what is the best way to attach the filter / are clamps acceptable or should I stick to threaded assembly? Thanks

A simple inline metal filter attached with hose works fine unless you want something fancier in appearence. I never liked the glass bowl type because I always worry about breakage and I never mount a filter near the manifolds for obvious reasons.But, if you're going for the authentic look the glass bowl type next to the carb is what you need.

when i first started on my 54 i put an inline filter underneath the truck coming right out of the tank and left my glass bowl one to the carb so it would look correct. sounded like a good idea at the time but not so good when it came time to change the inline filter and I had a full tank of gas! live and learn.

i agree, accessablity is important

Clamps and rubber fuel-hose connections work fine. Or, if you are not concerned about appearing "authentic", you could put any type of filter before the fuel pump and use a stop-cock on the fuel-tank side of the filter.

I did this with dual carbs on a 261 in a situation where there was no place to put the filter between the fuel pump and the carbs. By placing the fuel pump before the fuel pump amnd having a stop cock between the pump and the fuel tank, (1) you can stop the flow when you want to clean/replace the fuel filter, and (2) use a glass bowl filter that will drip on the ground when you service it.

Here is the arrangement of parts (my original-size fuel lines are 5/16" and all connections are metal Weatherhead-Eaton from NAPA):

fuel line from tank -> brass stop cock -> filter -> fuel pump -> line to carbs

fuel line from tank into 5/16" compression fitting on the stopcock; 1/8" threaded male out of stopcock into 1/8" female into glass bowl-filter; 1/8" threaded male to 5/16" compression adapter out of the fuel pump (this adapter goes into the 1/8" threaded female on output side of filter and has a 5/16" compression fitting to go onto the fuel line going to the carburetor).

I like both. I put an in-line filter underneath between the tank & pump. Dirt can foul up the pump if you don't. Then I like something in or in front of the carb. in case something comes off the line or pump & can lodge in the needle & seat. You can disconnect the line on top of the tank behind the seat to keep gas from running while you change it.

Sounds like a good, simple plan. I hadn't even thought of the stopcock. Thanks

By using a 100 Micron filter mounted on the frame you can be sure that nothing will get to the carb. I did this on my 62 Chev. using steel lines out of the tank and Earl's fitings and a stopcock it will work fine when changing the filter.
62Blue
Don

What about for putting an inline filter near the gas tank:

,--- on the gas line right after the tank, cut and put a 6" section of flexible gas hose, then an inline filter, then another 6" hose connected from the filter to the gas line that goes to the engine.
Use hose clamps for all connections.
With a flexible hose on both ends of the inline filter it would be easy to change the filter, all you would have to do is squeeze a pair of vice-grips on the both hoses to stop any gas from leaking out when you have to change the inline filter. (??)
The temporary use of vice-grips replace the 'stopcock' and both sides of the gas line does not drain when replacing the filter.
Also attach the filter to the frame.
Another filter right before the Carb is also a good idea.

A spin-on underneath cab and an in-line before carb. would work good.

An in-line filter between the tank & pump will help keep debris out of your pump & carb. I put one on just before the pump. It isn't factory original but IMHO it's better to put one before the pump than after it.