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Tractor Talk Discussion Forum

Boiling Gas in gas Tank with a lot of pressure

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ROC

09-23-2004 17:41:16




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Hey Gang,

I have an old 1958 Ford 860 that I use for mowing and bush hogging and the gas in the tank gets so hot it boils. Is this normal? The pressure in the gas tank is hissing after an hour of mowing and I am afraid it will blow.
Any information would be great.
RC




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rustyfarmall

09-23-2004 22:09:46




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to ROC, 09-23-2004 17:41:16  
Those Fords did have a problem with the gas tanks overheating. The recommended fix was to remove the muffler from under the hood, replace it with just an exhaust pipe, and then a vertical muffler located outside the hood. Quite a few of the Ford tractors in my area had to have this cure performed, and they all still had the heat shield in place.



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Larry806

09-23-2004 19:42:25




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to ROC, 09-23-2004 17:41:16  
Check there should be a heat shield between the gas tank & the muffler which is right under it Even if you have to take a piece of meatel & make one



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Mike (WA)

09-24-2004 08:40:14




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to Larry806, 09-23-2004 19:42:25  
Sheet copper makes the best heat shield of all. I had a wood stove about 18 inches from a brick wall, and the bricks got so hot you couldn't put your hand on them. I installed a copper sheet about an inch out from the wall, and no matter how hot the fire got, the copper was cool to the touch. So was the wall behind it. I think sheet steel would have been hot in that situation.



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Mark - IN.

09-23-2004 20:20:47




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to Larry806, 09-23-2004 19:42:25  
A person might be surprised at how nicely one of the wife's old or new cookie sheets can be cut, bent, and strategically mounted between the heat source and what one is protecting, to fix such a problem. It's thin, flexible enough, can be painted, absorbs and dissipates heat very well when placed in between the two objects. Been many a cookie sheet come up missing in my house. If ever asked about a missing cookie sheet, simply reply "I don't mess around in your kitchen, you don't mess around in my barn".

A new, vented gas cap might be a nice touch too.

Didn't Jerry Lee Lewis have a song about exploding tractor and motorcycle gas tanks that sat between one's legs called "Great..." - ahh, can't remember the name.

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txblu

09-24-2004 05:53:15




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to Mark - IN., 09-23-2004 20:20:47  
So that's where he got the lyrics to great balls of fire.

I liked the time he was on stage and set a grand paino on fire. How the fire marshall let him get away with that I'll never know but it was spectacular. Sitting on the bench banging out beautiful tunes and fire all over the place. What a deal.

I don't know how he could bang the keyboard, from such a height, and hit the correct keys every time.


Mark

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kjm

09-23-2004 19:26:11




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to ROC, 09-23-2004 17:41:16  
New cap,fast!!!!! !!!!! !!!!



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Leland

09-23-2004 18:15:46




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to ROC, 09-23-2004 17:41:16  
I belive I would find a gas cap fast, visit a burn center and you will see my point!!



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RWK in WI

09-23-2004 18:12:10




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to ROC, 09-23-2004 17:41:16  
Your gas tank should be vented to prevent pressure build up. Gas under pressure is very dangerous. If you are using a gas tank cap that seals the tank it needs to be replaced. A Ford / New Holland dealer will take your old cap and record your serial number if you know it and give you a FREE venting cap. Be safe.



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Nebraska Cowman

09-23-2004 18:04:33




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to ROC, 09-23-2004 17:41:16  
drove a Ferguson 30 lots of hours that way.
gas boils at a low temerature. just don't take the cap off when it's hot.



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Brian in NY

09-24-2004 06:46:05




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to Nebraska Cowman, 09-23-2004 18:04:33  
It is the same principal as a pressure cooker. Pressure + heat will cause a liquid to boil faster than just heat alone.

You gotta get a vented cap right away...and also get the heat reduced near the tank.

You are running a real risky operation there.



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txblu

09-24-2004 08:18:47




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to Brian in NY, 09-24-2004 06:46:05  
Brian, it's the other way around. Lower the pressure on a room temp water low enough and it will boil. 212F boiling point of water is at 1 atmosphere (14.7 psi).

Radiator pressure caps for vehicles allow the temp of the solution to rise above 212F B4 it boils by increasing the atmospheric pressure 15 psi or thereabouts. Boiling point then moves up to 240-250F ish.

What your pressure cooker is doing is forcing the hot water solution into whatever your cooking to get a more uniform (thorough) heating and adding water to it at the same time to make it tender and moist.

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txblu

09-24-2004 08:24:52




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to txblu, 09-24-2004 08:18:47  
Forgot something important. It cooks quicker too as the temp is hotter due to the pressure. I think that was the main thing behind them becoming popular; quicker meal prep. Let's see, as I recall they had (have) 5, 10, and 15 psi positions for the weight that sits on top of the lid which corresponds to 3 different temperatures for 3 different things to cook.

Mark



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Brian in NY

09-24-2004 14:02:20




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to txblu, 09-24-2004 08:24:52  
I guess I was off, I was trying to say that pressure + temp causes liquids to get hot faster. You are right that they do not necessary boil at the same temp.

I was giving some bad info I guess.

thanks for righting me.



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txblu

09-25-2004 07:13:47




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 Re: Boiling Gas in gas Tank with a lot of pressure in reply to Brian in NY, 09-24-2004 14:02:20  
We're in this together man. Never know who will read it and use it and we want to make sure they get their problem solved as a result.

Hang in there. Heck, I'm off bout 50% of the time. Try to remember things and remember just enough to get it backwards. Should keep my mouth shut or have the reference books next to me when I blab.

Mark



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