Fuel pump leak

Gezer

Gezer

Member
I have a 40 ford with an EAB engine. After sitting for a few days the fuel in the bowl leaks down. Can not tell if it is going back to the tank or to the engine.
I have to take the bowl off and fill it to the top by hand, then I can get it to run.
What do you suggest I do to keep the fuel level in the bowl full.
 
Here's an earlier thread dealing with this:
https://www.fordbarn.com/forum/showthread.php?t=311395&highlight=fuel+bowl+leaks+dry

Just for the heck of it, remove the top of the carb and fill fuel bowl to appropriate level. Then cover the top of the card and let it sit overnight with the top of the carb still removed and check it to see if fuel level has changed. If it has dropped a lot, my guess is that the power valve is leaking. There has been a lot of issues with some of the replacement power valves not fitting and seating properly.
 
Gezer said:
I have a 40 ford with an EAB engine. After sitting for a few days the fuel in the bowl leaks down. Can not tell if it is going back to the tank or to the engine.
I have to take the bowl off and fill it to the top by hand, then I can get it to run.
What do you suggest I do to keep the fuel level in the bowl full.
Click to expand...

Are you talking about the glass bowl at the fuel pump, or the float chamber of the carburettor?
If it is the glass bowl. it can either be the bowl gasket or one of the non return valves in the pump. I would get a kit for the pump, make sure it is compatible with todays fuel, and replace the diaphragm too.
 
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69a has your answer. Take care with those pump and bowl gaskets. That's one place you don't ever want to see even a slightly bad gasket. The bowl gasket should be the cork as original, and wetted down with engine oil to soften it sufficiently to make a good seal. The diaphram is it's own gasket, be careful to snug those screws carefully to seal, but not too tight to strip the threads. The single top bolt and gasket is as important as any other, and strips out just as easily. As 69a said, the two internal valves can go wompers also, causing your problem, even if they perform well enough to run decently once you get started. Don't let my cautions scare you off from rebuilding it yourself, it's not complicated at all, just treat it with the care it deserves, and while you're at it, replace the flex hose with a new one from Shewman, his ads to be found in the V8 Times.
 
I agree with all the above advice on going through your fuel pump, with a few additions:
Make sure the fuel pump top is not warped where the glass bowl goes. I have seen several fuel pumps recently that were so badly warped from overtightening the glass bowl that the gasket could not seal it up.
Check which type of thread is in your fuel pump inlet before ordering a new hose, Ford changed the inlet threads in 1951. Either design pump will bolt onto your engine.
Also, make sure the fuel pump is rebuildable. I have taken a few apart where the valves were not replaceable and were bad.
 
Carb rebuilding kit from Daytona in Fla check their web site. Most likely the power valve or it's gasket are bad, this will drain the float bowl on a 94 carburetor which I am only guessing is a 94 and how many days is a few, 6-7 or 1-2?
Both the Carb and the pump have bowls which you are most likely not removing but removing the bowl cover.
 
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