Cutting into gas line. Consequences.
 

I'm embarrassed for publicly asking this question but memory is unclear nowadays. If I cut into fuel line to swap out fittings at electric fuel pump which is mounted inside the frame rail close to the tank, the only gas that will drain out is the gas in the line, correct? No siphoning action of gas out of the tank, Correct? I can't believe I'm asking this question.

Re: Cutting into gas line. Consequences.
 

I don't know how things are plumbed in your case. Maybe it wold be a good idea to keep a pan handy just in case.

Re: Cutting into gas line. Consequences.
 

Always.

Re: Cutting into gas line. Consequences.
 

If, where you cut, is lower than the level in the tank, it certainly will syphon. Why not drain the tank? be less mess and safer.

Re: Cutting into gas line. Consequences.
 

Just crack open a fitting with a pan at the ready, if no continual flow after lines have drained, you're good to go.

Re: Cutting into gas line. Consequences.
 

Any early Ford fuel line I worked where the gas tank was located at the rear under the car once the fuel line along the frame rail was opened up gas began flowing.
Ronnieroadster

Re: Cutting into gas line. Consequences.
 

Lawson, While you're at it, install a petcock in the fuel line between the tank and your in line filter and fuel pump. I used a radiator pet cock you see in photo. Fuel line is 1/4 in.

Re: Cutting into gas line. Consequences.
 

Thanks for reminding me to drain the tank, Brian. I was planning on doing that anyhow and blowing out all of the gas lines. I will also be replacing the rubber hose that is connecting the gas line and electric pump. I am getting crud in the carburetor from somewhere, two in line filters between the tank and carburetor notwithstanding. Frustrating.

Re: Cutting into gas line. Consequences.
 

Hey Lawson! When you replace the rubber hose, make sure it is labeled "fuel injection".
It will hold up better with today's gas, that has ethanol in it. Around my parts it is 10%.
- Bernie

Re: Cutting into gas line. Consequences.
 

Hey Lawson! When you replace the rubber hose, make sure it is labeled "fuel injection". It will hold up better with today's gas, that has ethanol in it. Around my parts it is 10%.
- Bernie

Gotcha. Already have the hose in my hot little hands.

Re: Cutting into gas line. Consequences.
 

I have always been reluctant to use ethanol gas as I'm afraid of what it will do to rubber parts - What precautions do others take (if any ) when using ethanol gas ?

Re: Cutting into gas line. Consequences.
 

Lawson, if you have any rubber hoses upstream of where you are working, this is what I do. Clamp the hose off with a set of small needle nose vice grips. I slide an inch or so of rubber fuel line on each jaw of the vise grips to protect the hose. I have been beside the road changing filters with fuel running down into my armpits way too many times. I refuse to drive any more with a tank that is even remotely questionable. My current stable has 2 poly tanks, one aluminum and one solid original heavily treated with red-cote.

Re: Cutting into gas line. Consequences.
 

My guess is that if your pump is lower than the fuel level in the tank then yes, it will siphon. My 37 Lasalle had a similar configuration and at 82 I will do almost anything these days to avoid climbing under a car, particularly to change a fuel filter with fuel running down my arms. I installed two Facet pumps in series with a downstream filter on the frame rail in the engine bay with a selector switch for the desired pump. Having two pumps is for redundancy. These pumps will lift fuel from the tank just like the original 84 year old pump did and changing the filter is a piece of cake. Worth considering.

Re: Cutting into gas line. Consequences.
 

Sill getting crud in the carb w/2 filters?
Shouldn’t be passing thru your filter-
Start with what is between filter & carb and carb itself-
Are you using fords flex line at the fire wall?
Rubber line collapsing?
Has your carb been updated with alcohol friendly pump?