Air Tank leak [message #323743] |
Sun, 10 September 2017 22:22 |
hrtravel
Messages: 2 Registered: August 2015 Location: Stony Plain, AB
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My air tank has a small pin hole leak. Am looking for suggestions to do a repair at this time rather than buy a new tank.
If I need a new tank does anyone know where one can be purchased in Canada. Applied GMC sells them but the picture in their catalog shows a label "Made in Canada".
The tank is 7" in diameter & 12" long. Its for a 1973 GMC Sequoia.
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Re: Air Tank leak [message #323744 is a reply to message #323743] |
Sun, 10 September 2017 22:49 |
Dennis S
Messages: 3046 Registered: November 2005
Karma: 2
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Look here
http://www.gmcmotorhomemarketplace.com
Look for Jim Demaere in Alberta
Dennis
hrtravel wrote on Sun, 10 September 2017 22:22My air tank has a small pin hole leak. Am looking for suggestions to do a repair at this time rather than buy a new tank.
If I need a new tank does anyone know where one can be purchased in Canada. Applied GMC sells them but the picture in their catalog shows a label "Made in Canada".
The tank is 7" in diameter & 12" long. Its for a 1973 GMC Sequoia.
Dennis S
73 Painted Desert 230
Memphis TN Metro
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Re: Air Tank leak [message #323765 is a reply to message #323744] |
Mon, 11 September 2017 11:57 |
77Royale
Messages: 461 Registered: June 2014 Location: Mid Michigan
Karma: 6
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You may have some luck with JB Weld. I have used that on a bunch of different things with pretty good to great results.
Id scrape and scuff up the surface where the leak is, Wire wheel / sand paper. Get it clean and go for it. For a few bucks its worth a shot.
77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy.
Mid Michigan
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Re: Air Tank leak [message #323767 is a reply to message #323743] |
Mon, 11 September 2017 12:03 |
shaunone
Messages: 80 Registered: August 2016 Location: Cranbrook, B.C.
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I don't think I would try and repair it. It has a pinhole because it is rusting out from the inside. Your best bet would be a stainless tank, and it doesn't get much closer than Jim in Lethbridge. Alternatively, I have made an air tank before from an old fire extinguisher. You can usually get them for free when they are 'de-commissioned'. You will need to weld an adapter to it, but it's fairly straightforward. Some guys have even made tanks out of coleman propane bottles, but more fabrication is required.
1977 Palm Beach, 455, mostly stock and original
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Re: Air Tank leak [message #323771 is a reply to message #323765] |
Mon, 11 September 2017 12:40 |
Ken Burton
Messages: 10030 Registered: January 2004 Location: Hebron, Indiana
Karma: 10
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I repaired a 100 gallon Compressor tank about 5 years ago. Go get a small self threading bolt or fine threaded sheet metal screw. Enlarge the hole enough to start the screw. Put some sealant on the threads of the screw and thread it in. The metal in that area is usually very thin from internal rusting an very difficult to weld.
I did have one that I put about 3 layers of fiber class about 1 or 1.5 " square over the hole and threaded in the bolt through the fiberglass and in the hole while the epoxy was still wet.
A screw with JB weld might also be effective.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Re: Air Tank leak [message #323788 is a reply to message #323767] |
Tue, 12 September 2017 10:15 |
Ken Burton
Messages: 10030 Registered: January 2004 Location: Hebron, Indiana
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I actually have two air tanks on my coach. The second one is a decommissioned fireman's air bottle rated at over 3000 PSI. We are only using it at 125 PSI or so and you can usually find them for free. .
As far a pressure exerted on an installed screw, it is very minimal. At 120PSI the pressure computes to be 2.4 PSI actually exerted on a 8 screw. A little less for a #6 and slight more for a #10. That is hardly a rifle shot or anything of that nature. I have repaired many tanks over the years, some were in commercial applications, and never had one fail. If iy really bothers you install a band clamp (radiator hose clamp) over the screw and around the tank
Or go buy a new one if you want.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Re: Air Tank leak [message #324629 is a reply to message #323743] |
Thu, 05 October 2017 16:52 |
hrtravel
Messages: 2 Registered: August 2015 Location: Stony Plain, AB
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Junior Member |
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Thank you all for the input. I have ended up ordering a new tank, primarily because there was way too much rust when tried to clean it thus would likely get more holes.
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