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(1) 2 »

Unplugging a Scully Ventalarm
#1
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Wesley Boyer
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Well here I go again, I started working on an Off the Shelf Gas Sender and I find another problem. So now I need to get this fixed before I can finish that project. While filling the tank with liquid (after about five gallons) the tank burped at me and spit out about a quart of liquid. That was when I noticed the tank wasn't vented. Since the tank had been coated inside the Ventalarm had been pluged.
Now I'm trying to unplug it, I've tried blowing air (about 150 PSI but not a good seal) but no help.
Next step I'm thinking about is drilling a hole in the top of the Ventalarm and see if I can poke a hole through the sealer.
Has anybody had a problem like this and if so how did you fix it?
Any help?
Wes

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Posted on: 2017/4/7 19:27
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Re: Unplugging a Scully Ventalarm
#2
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HH56
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The first bulletin on clearing the whistle had the mechanic blow air down the vent just as you did. With no results that way, Packard says the housing is soldered on so possibly it could be unsoldered and the whistle cleaned.

Depending on what dissolves the sealer compound, it might also be possible to pour something down the vent tube such as lacquer thinner or xylene or maybe even one of the really powerful methylene chloride or similar paint strippers to remove the goo. If the whistle would survive the cleaning is a question though.

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Posted on: 2017/4/7 20:05
Howard
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Re: Unplugging a Scully Ventalarm
#3
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Wesley Boyer
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Thanks Howard, I removed the pipe off my old tank that I had just cut in half to see how hard it would be. I use my Blow Torch and found it was solder on at three places. With a little heating it came right off.
Next I"ll move to the good tank, i don't see any problems.
Thanks!
Wes

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Posted on: 2017/4/8 20:28
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Re: Unplugging a Scully Ventalarm
#4
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Wesley Boyer
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If anyone is interested in learning more about the Sulley Ventalarm here's the patent US2493699.
Enjoy good reading: https://www.google.com/patents/US24936 ... TAhVX82MKHY97BNMQ6AEIKjAB
Wes

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Posted on: 2017/4/11 20:39
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Re: Unplugging a Scully Ventalarm
#5
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Wesley Boyer
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Howard , after rereading this patent, I think this was talking about putting a dent with a cut in the fill pipe to stop the tank from whistling while driving.
Wes

Posted on: 2017/4/12 10:01
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Re: Unplugging a Scully Ventalarm
#6
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HH56
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Maybe so but that brings a question on how it would whistle with a cap on and just suction of the fuel pump drawing in air thru the tiny hole in the cap. I wonder when the original patent came about and if it was used on any prewar cars.

Interesting that it was on 21st series cars before that maybe revised patent was filed. By todays standards, something installed that others could examine or copy before a patent was even filed for seems strictly verboten.

Posted on: 2017/4/12 10:02
Howard
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Re: Unplugging a Scully Ventalarm
#7
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Wesley Boyer
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Apparently according to the patent when the fuel sloshed around it was causing an annoying whistling due to the difference in pressure in the tank and fill tube as the fuel move around in a partially full tank.
I checked both of my tanks and they don't have this change, but that patent did say 1950 so when I get my tanks fixed I've have to listen for a whistling while driving around.
Wes

Posted on: 2017/4/12 12:30
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Re: Unplugging a Scully Ventalarm
#8
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Wesley Boyer
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Well I got the Ventalarm off and it was blocked good. Pull the unit and I was a able to burn all the sealant out of it. So next step is to clean it up and reinstall it.
Wes

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Posted on: 2017/4/13 9:13
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Re: Unplugging a Scully Ventalarm
#9
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Wesley Boyer
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Here's how much carbon I got out of the Ventalarm I just hope it wasn't anything else in there.
Wes

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Posted on: 2017/4/13 18:46
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Re: Unplugging a Scully Ventalarm
#10
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Elefant
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Posted on: 2017/4/15 12:30
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