gas tank
- Thread starter tilen
- Start date
How do you presure test a gas tank to see if there is no leaks
BRENT in 10-uh-C
Well-known member
Seal up the gas cap and the fuel gauge opening, and screw a ¼" pipe fitting into the fuel outlet. Add 2 lbs of pressure and use a soapy water mix and spray around every place you can think of looking for bubbles.
BRENT in 10-uh-C
Well-known member
What town in the 'Show-Me' state??
Joe K
Well-known member
Be VERY careful with that air. Go not above 5 psi. The power of constrained air to deform panels is not to be understated.
Maybe do the inflating with one of the rubber pointed air chucks. And hold it with your hand. Thus you could let off at any sign of failing, or if your hand gets tired!
I have a gas tank that was used on a doodlebug. It has a large "crease" across the top where a cable must have been wrapped and left it's imprint during it's workaday life. I would dearly love to remove that crease - the tank is in very good condition other than that and I expect will still hold gas.
I've thought of different ways to remove that crease, including separating the halves and hammering it out from the inside, or possibly nflating the tank to the point where it "bumps" out. But I dare not. Do the arithmetic. 15 psi x 10 inches deep by 30 inches wide - that's a lot of force. And welded according to a submerged arc procedure that today would be considered not to current weld thinking.
So instead I'll simply fill the crunch with bondo, and use the tank minus one gallon capacity.
No biggie.
Joe K
Maybe do the inflating with one of the rubber pointed air chucks. And hold it with your hand. Thus you could let off at any sign of failing, or if your hand gets tired!
I have a gas tank that was used on a doodlebug. It has a large "crease" across the top where a cable must have been wrapped and left it's imprint during it's workaday life. I would dearly love to remove that crease - the tank is in very good condition other than that and I expect will still hold gas.
I've thought of different ways to remove that crease, including separating the halves and hammering it out from the inside, or possibly nflating the tank to the point where it "bumps" out. But I dare not. Do the arithmetic. 15 psi x 10 inches deep by 30 inches wide - that's a lot of force. And welded according to a submerged arc procedure that today would be considered not to current weld thinking.
So instead I'll simply fill the crunch with bondo, and use the tank minus one gallon capacity.
No biggie.
Joe K
Mike V. Florida
Well-known member
You could use a stud welding gun and pull it out? Harbor freight has one for 100.00 including the pulling hammer.
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BILL WILLIAMSON
Well-known member
Tilen, and MANY times WE get help from folks like you who may have an idea or an approach that we hadn't thought of! Bill W. & Buster T. (Dog
)Thanks again the reason for the question I inherited a 1930 coup with a one gallon lawn mower gas tank bungee cord to the firewall with no filter to carburetor. I put a new pop lock ,plugs and change the oil and she purrs like a kitten looking her over the head lights have new wires not hooked up to the original wires from the switch(wires cut) many other problems that I am learning about as I go but I enjoy the challenge…..again thanks for all the advice .