Took the tank out of the wife's '70 to dump the old gas. Float is full of gas and sunk. Not seeing one listed for the '70 F-100 anything fit that would still be available from the parts store?

 

Believe there are 2 sizes of tanks and your truck should have larger. ND will have specks. I got one for my 66 from Carolina Classics about a year ago.

You will need the complete tank gauge set.



John

 

The float is made from two pieces of brass soldered together. Solder breaks down, gas seeps in, float settles to the bottom of the tank.

C0AZ-9202-B (replaced B7A-9202-A) .. Fuel Sending Unit Float / Available from Ford & all the repro parts sellers.

ALL: 1957/79 Passenger Cars/Trucks; 1961/79 Econolines; 1966/79 Bronco's.

Carpenter sells a 'replacement' float for about 5 bucks.

 

Thanks much ND. Picked one up from the local dealership and tank is ready to rock and roll

 

I pulled a sending unit out of one of my tanks. Much to my amusement the PO had used a wine cork. It fit fine and seemed to work. lol

 

But how was the wine? That's the important question. How long do you think that cork was in the tank? Anyone know if gas breaks down cork? Millam, you may have stumbled on a good field fix.

 

Good. Maybe we have stumbled onto a new vintage. It can't be any worse than this headbuster I drink. The grandkids call it "Who hit Poppy".

Semper Fi

 

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I tried a wine cork, it worked for a while, maybe a year or two and then sunk. Have to coat it with something, some kind of epoxy. Old carbs used cork floats, coated with orange shellac. Modern gasoline eats orange shellac. Maybe something like Por15 would work, I dunno.

 

It appeared that the cork had been in there for at least a few years and there was no sign of it crumbling or having absorbed fuel. Cork is a cellulose so it should be non-soluble in gasoline. Someone said that they tried this and the cork sank after a couple of years. I really couldn't say one way or t'other. I have 4 spare brass floats just in case. A couple of those from 20 years or so ago... One day I might need one ya' know. lol

 

I have used a Q-jet carb float before. It won't fail like the brass ones.

 

This is just my experience so don't take it as a blanket statement. I have never had a brass float failure. As partially evidenced by my accumulation of 5 spare floats. Never had one fail on a Holley either.
I have de-soldered and re-soldered a brass float just to see if it was possible. Simple and easy is what I found that to be.

 

Back when my GM vehicle was about like 5 yrs old the Q-jet float failed on the 396 motor that was not a brass one but some man made crap that GM used, made in Mexico mostly.

I weight both new & old on my wives postal scale before cutting it in half to make sure that was the problem and all but about 3/8" center was wet soaked with gas.

The only brass floats I've seen fail was ford fuel tank sending units.
Orich

 

I have seen that once, back the early 80s. GM said they got a run of bad floats. I've replaced 5-6 brass floats on Ford trucks, tho. Back in the day my local Ford dealer used to keep a box of them under the front parts counter for easy access.

In my experience with the Ford floats, it's not the solder joint that fails, its rub-thru from the arm clamp.

 

Curious and interesting.
My trucks have all been Arizona trucks. I found one, not counting the wine cork, in all these years that had a bad float. But it had been sitting for almost 20 years without a gas cap and the float was pretty much dissolved from water and acids.
Those who have seen the bad floats. What states or environments were those in?