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Air Tank leak [message #323743] Sun, 10 September 2017 22:22 Go to next message
hrtravel is currently offline  hrtravel   
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Registered: August 2015
Location: Stony Plain, AB
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Junior Member
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.


Re: Air Tank leak [message #323744 is a reply to message #323743] Sun, 10 September 2017 22:49 Go to previous messageGo to next message
Dennis S is currently offline  Dennis S   United States
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Registered: November 2005
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Senior Member
Look here

http://www.gmcmotorhomemarketplace.com

Look for Jim Demaere in Alberta

Dennis

hrtravel wrote on Sun, 10 September 2017 22:22
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.




Dennis S
73 Painted Desert 230
Memphis TN Metro
Re: Air Tank leak [message #323765 is a reply to message #323744] Mon, 11 September 2017 11:57 Go to previous messageGo to next message
77Royale   United States
Messages: 461
Registered: June 2014
Location: Mid Michigan
Karma: 6
Senior Member
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
Re: Air Tank leak [message #323767 is a reply to message #323743] Mon, 11 September 2017 12:03 Go to previous messageGo to next message
shaunone is currently offline  shaunone   
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Registered: August 2016
Location: Cranbrook, B.C.
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Member
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
Re: Air Tank leak [message #323771 is a reply to message #323765] Mon, 11 September 2017 12:40 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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Registered: January 2004
Location: Hebron, Indiana
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Senior Member
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
Re: [GMCnet] Air Tank leak [message #323772 is a reply to message #323743] Mon, 11 September 2017 13:26 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
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Registered: August 2005
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Senior Member
Leave it off you do not need one

On Sun, Sep 10, 2017 at 8:23 PM Harv Rockel wrote:

> 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.
>
>
>
>
> _______________________________________________
> GMCnet mailing list
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Re: [GMCnet] Air Tank leak [message #323774 is a reply to message #323772] Mon, 11 September 2017 15:54 Go to previous messageGo to next message
Justin Brady is currently offline  Justin Brady   United States
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Registered: April 2015
Location: Bell Buckle, TN
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Senior Member
Air tanks are bombs. Once it leaks it's trash.
Threading a bolt into an enlarged hole in a rusty air tank and then pressurizing to 120PSI is a recipe for a bolt shot through your face or worse yet your loved one's face when they walk by at some random point down the road.
Compressed air is not something to mess with.

https://www.youtube.com/watch?v=KVP_A7eGYxw

Replace it with a stainless tank from JIM or a small tank from Viair.

https://www.summitracing.com/parts/var-91005?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-viair-corporation&gclid=EAIaIQobChMIsrm8lIKe1 gIVxh6GCh0uzwr7EAQYASABEgLjivD_BwE


Justin Brady http://www.thegmcrv.com/ 1976 Palm Beach 455
Re: Air Tank leak [message #323788 is a reply to message #323767] Tue, 12 September 2017 10:15 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
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
Re: Air Tank leak [message #324629 is a reply to message #323743] Thu, 05 October 2017 16:52 Go to previous message
hrtravel is currently offline  hrtravel   
Messages: 2
Registered: August 2015
Location: Stony Plain, AB
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Junior Member
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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