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| Holding Tank Repair Question w/photo [message #253676] |
Sun, 29 June 2014 17:02  |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
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I got the tank flushed out, bleached out, flushed out again, dried out, and all of the discharge plumbing removed.
Never really took a close look at the crack until today and am pretty certain it can not be plastic welded in the traditional way.
What I am wondering is if this is something I could possibly repair my self with a heat gun, and a hot glue gun.
I would really like to not have to replace this tank although that would certainly be the best option, and probably will be one day, just not now.
As always, I welcome all comments!!
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
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| Re: Holding Tank Repair Question w/photo [message #253678 is a reply to message #253676] |
Sun, 29 June 2014 17:17  |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
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Another thought I have is that we use an awesome 2 part marine epoxy at work. This stuff can be applied under water if need be.
The crack is close enough to the discharge that I can get my gloved hand in there to acetone it, and spread the epoxy all the way around.
From the inside I would be able to smoosh it to get it to ooze out through the crack, and then could hot glue on top of that......
Just an idea,
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
[Updated on: Sun, 29 June 2014 17:18] Report message to a moderator |
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| Re: Holding Tank Repair Question w/photo [message #253681 is a reply to message #253678] |
Sun, 29 June 2014 17:33 |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
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I like that idea. And I want some of that epoxy! ;o)
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: Holding Tank Repair Question w/photo [message #253683 is a reply to message #253678] |
Sun, 29 June 2014 17:45 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
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If the epoxy says it will work on polypropylene or polyethylene which ever your tank is otherwise I would melt in material with a big soldering iron. You may be able to get enough from the edges of the tank.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: Holding Tank Repair Question w/photo [message #253684 is a reply to message #253678] |
Sun, 29 June 2014 17:45 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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lotsofspareparts wrote on Sun, 29 June 2014 17:17Another thought I have is that we use an awesome 2 part marine epoxy at work. This stuff can be applied under water if need be.
The crack is close enough to the discharge that I can get my gloved hand in there to acetone it, and spread the epoxy all the way around.
From the inside I would be able to smoosh it to get it to ooze out through the crack, and then could hot glue on top of that......
Just an idea,
Jared
Hey, worth a try. If it doesn't work you are no worse off than you are now. If it does work you bought yourself some time, or, best scenario, You saved $300. If you can get some really really good epoxy to squeeze through the crack and get it to "smoosh" out on the inside then why bother with hot glue.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: Holding Tank Repair Question w/photo [message #253685 is a reply to message #253684] |
Sun, 29 June 2014 17:57 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
Karma: -9
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midlf wrote on Sun, 29 June 2014 15:45lotsofspareparts wrote on Sun, 29 June 2014 17:17Another thought I have is that we use an awesome 2 part marine epoxy at work. This stuff can be applied under water if need be.
The crack is close enough to the discharge that I can get my gloved hand in there to acetone it, and spread the epoxy all the way around.
From the inside I would be able to smoosh it to get it to ooze out through the crack, and then could hot glue on top of that......
Just an idea,
Jared
Hey, worth a try. If it doesn't work you are no worse off than you are now. If it does work you bought yourself some time, or, best scenario, You saved $300. If you can get some really really good epoxy to squeeze through the crack and get it to "smoosh" out on the inside then why bother with hot glue.
I kind of figured with heating the tank with a heat gun, and then using the hot glue it could make an even tougher repair than just the epoxy alone, which I would be applying to the inside of the tank, and smooshing to the outside.
Does anyone know where to source a new metal backed 01447 Thetford Dump Valve. This valve is cracked, froze open, siliconed, and the PO installed a 3in Valterra valve further down the line. I can't put this valve back on in the condition it is in.
Thanks guys,
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
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| Re: Holding Tank Repair Question w/photo [message #253686 is a reply to message #253683] |
Sun, 29 June 2014 17:59 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
Karma: -9
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roy1 wrote on Sun, 29 June 2014 15:45If the epoxy says it will work on polypropylene or polyethylene which ever your tank is otherwise I would melt in material with a big soldering iron. You may be able to get enough from the edges of the tank.
Considered that, just don't know how to do it since it is the bottom of the tank and gravity sucks.
And to be honest I would be afraid of making it even worse.
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
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| Re: Holding Tank Repair Question w/photo [message #253687 is a reply to message #253686] |
Sun, 29 June 2014 18:09 |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
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Sorry Jared, but after reading your posts, I just have to say:
Crap, does anything on your coach work or not need major repairs?
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: Holding Tank Repair Question w/photo [message #253691 is a reply to message #253687] |
Sun, 29 June 2014 18:20 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
Karma: -9
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Otterwan wrote on Sun, 29 June 2014 16:09Sorry Jared, but after reading your posts, I just have to say:
Crap, does anything on your coach work or not need major repairs?
I can tell you the switch pitch transmission shifts great, all of the appliances were replaced in 91, the Alcoa wheels are worth more than I paid for the coach and via email from another member I discovered I have a "Winterfeldt" engine that will not have to be replaced for a long time. Sorry to hear he passed away, apparently he used to build kick A$$ engines.
Couple all of that with the fact that all of the appliances work great, the 2 Zip Dee Awnings, the Holley Projection, Doug Thorley Headers, HPV 900 ventilator with thermostat, the "Tru Trak" system, the Visor, Leather Dygert Captains Chairs...... I am sure I am forgetting something...... Oh yeah, 3in exhaust, a class 3 hitch, stainless steel fresh water tank, Porcelain Toilet, Microwave/Broiler/Toaster Oven Combo, automatic folding step, and the propane tank was full.
And I was able to drive it home after sitting for 12 years........
And I only paid $500.
Anything else you want to ask me??........ LOL
Jared
edit, and it only has 73k miles on it.
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
[Updated on: Mon, 30 June 2014 19:52] Report message to a moderator |
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| Re: Holding Tank Repair Question w/photo [message #253714 is a reply to message #253676] |
Sun, 29 June 2014 20:44 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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if it was my tank. and I had to fix and not replace.
I would use a ton of 3m 5200. I used that on a crack after I welded, and epoxied, and it really seemed to be a solid chemical that adheared.
only issue I had was cure time, but I did not use the "fast cure" I would recommend that.
I had removed that valve on my tanks as well. and my screws/bolt holes were intact,(lots of people have issues with the top bolt holes stripping. and when i did that, I used plumbers goop between the valve and tank mount, when i reassembled. and that did not leak for over 3 years. (replaced the tank later due to other issues).
http://www.walmart.com/ip/21129779?wmlspartner=wlpa&selectedSellerId=10&adid=22222222227000000000&wl0=&wl1=g&wl2=c&wl3=4183358 2510&wl4=&wl5=pla&wl6=19880599990&veh=sem
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Holding Tank Repair Question w/photo [message #253716 is a reply to message #253714] |
Sun, 29 June 2014 20:53 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
Karma: -9
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lqqkatjon wrote on Sun, 29 June 2014 18:44if it was my tank. and I had to fix and not replace.
I would use a ton of 3m 5200. I used that on a crack after I welded, and epoxied, and it really seemed to be a solid chemical that adheared.
only issue I had was cure time, but I did not use the "fast cure" I would recommend that.
I had removed that valve on my tanks as well. and my screws/bolt holes were intact,(lots of people have issues with the top bolt holes stripping. and when i did that, I used plumbers goop between the valve and tank mount, when i reassembled. and that did not leak for over 3 years. (replaced the tank later due to other issues).
http://www.walmart.com/ip/21129779?wmlspartner=wlpa&selectedSellerId=10&adid=22222222227000000000&wl0=&wl1=g&wl2=c&wl3=4183358 2510&wl4=&wl5=pla&wl6=19880599990&veh=sem
We use 3M 5200 at work, does not bond to plastic, we use a lot of HDPE also known as seaboard or kings board, 5200 will work on a plastic to fiberglass or other surface as a gasket, but will not bond otherwise. Once it is dry it just peels off.
It appears as though all of my holes have been stripped out sometime in the past. I plan on drilling all the way through the holes on the bottom so I can through bolt, on the top I will drill and pray I can use large stainless sheet metal screws.
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
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| Re: Holding Tank Repair Question w/photo [message #253749 is a reply to message #253676] |
Mon, 30 June 2014 00:16 |
glenn2726
Messages: 234
Registered: June 2014
Location: Topeka, Kansas
Karma: 2
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Hey Jared, man you and I really do have a lot in common...one problem after another..lol...these old rigs are one surprise after another...I haven't even got to my plumbing yet..I have my fingers crossed...lol.. I would suggest drilling small holes at each end of the crack in order to keep it from going any further first and then cleaning and maybe widening the crack with a small drill bit or thin saw blade in order to give more space for the glue to adhere to and hopefully when you apply it you can do it from outside and also inside the tank in order for it to form a better seal and bond. Hopefully that will hold you for a long time. The crack looks like it might be from stress at that spot. Any ways keep up the good work...I know you'll be on the road before I will...lol Glenn
Glenn W
Topeka, KS
1974 GMC 26 ft. Color:Camel Interior:Canyon Land
Side Bath, Rear Sitting Area
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| Re: Holding Tank Repair Question w/photo [message #253756 is a reply to message #253749] |
Mon, 30 June 2014 00:33 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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We have helped several people that did not want to spend funds on the tank, so we rough sanded the area well and used the epoxy type sealant and used fiber cloth to reinforce it.
Make sure that the pipe is not going the put stress on the joint.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: Holding Tank Repair Question w/photo [message #253770 is a reply to message #253686] |
Mon, 30 June 2014 01:07 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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lotsofspareparts wrote on Sun, 29 June 2014 15:59roy1 wrote on Sun, 29 June 2014 15:45If the epoxy says it will work on polypropylene or polyethylene which ever your tank is otherwise I would melt in material with a big soldering iron. You may be able to get enough from the edges of the tank.
Considered that, just don't know how to do it since it is the bottom of the tank and gravity sucks.
And to be honest I would be afraid of making it even worse.
Jared
best way would be to pull the tank and melt in the repair. This would be a good time to replace the theadford valve with a valtera valve but you will need to make an adaptor. It all takes time short cuts could work but you may not get lucky. You already scored the deal of the century.
Roy Keen
Minden,NV
76 X Glenbrook
[Updated on: Mon, 30 June 2014 13:03] Report message to a moderator |
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| Re: Holding Tank Repair Question w/photo [message #253784 is a reply to message #253686] |
Mon, 30 June 2014 06:20 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
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Jared -
My tank was cracked where the valve fitting was welded on. Lijke you, I could get inside to clean it properly. I didn't hot- glue it (didn't think of it) but used the epoxy Zeb Frady recommended. Black stuff for 'plastic tanks' in big print, I forget the folks who made it. Held just fine.
--johnny
'76 23' transmode norris
Braselton Ga.
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Holding Tank Repair Question w/photo [message #253807 is a reply to message #253716] |
Mon, 30 June 2014 09:35 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
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G'day,
Here's a repair using 3M 5200 I did to the black tank on Double Trouble worked:
http://www.gmcmhphotos.com/photos/g6238-black-tank-repair.html
Note the date of the photos in the right column; it's been five years and no leaks so in this application it did work. IIRC I
roughed the surface of the tank and the doubler with VERY coarse sandpaper and cleaned the surface with brake cleaner. I have not
tried to peal it off as that would be counter productive.
Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
USA '75 Avion - Double Trouble TZE365V100426
AUS '75 Avion - The Blue Streak TZE365V100428
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Jared
We use 3M 5200 at work, does not bond to plastic, we use a lot of HDPE also known as seaboard or kings board, 5200 will work on a
plastic to fiberglass or other surface as a gasket, but will not bond otherwise. Once it is dry it just peels off.
It appears as though all of my holes have been stripped out sometime in the past. I plan on drilling all the way through the holes
on the bottom so I can through bolt, on the top I will drill and pray I can use large stainless sheet metal screws.
Jared
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: Holding Tank Repair Question w/photo [message #253821 is a reply to message #253676] |
Mon, 30 June 2014 10:53 |
homer
Messages: 73
Registered: April 2011
Location: arizona/ BC canada
Karma: 0
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Jaed, A product I have used in the past in my boating years was SPLASH ZONE its a epoxy base fill which can be used on west surfaces and uderwater for leak repaire"s West marine may carry it but any good marine store will I think it was put out by Petite? good luck. Homer
homer
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| Re: Holding Tank Repair Question w/photo [message #253877 is a reply to message #253676] |
Mon, 30 June 2014 18:37 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
Karma: -9
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Alrighty, after reading the directions for the epoxy we use at work it states in small print at the bottom, will not work on polyethylene, or polypropelene.
I went to Arlington hardware after dropping off my wheels at Les Schwab, talked to the guy at the paint counter (everyone who works at Arlington Hardware are geniuses), and he recommended againt using an epoxy, especially at that location that can have stress on it if the discharge pipe is not secured properly, and since the epoxy dries hard it can come unattached.
I told him my situation, and that I was able to get to both sides of the crack. He stated I needed something that would remain flexible and something that sticks to everything. I hadn't even considered Shoe-Goo. I used it when I was a kid to repair my skateboarding shoes and I have to tell you it is incredibly sticky stuff.
So currently, that is what my repair is. Acetoned the inside and outside of the crack area, squeezed the goo in the tank and worked it around with 2 gloved fingers until it was coming out of the crack about 1/8in. I then put another layer inside the tank and did a layer over the crack outside of the tank. Extended it out past the crack surface about 3/4in.
I gotta tell you, I am very optimistic about this, in theory it sounds like it would be a good repair material.
We will see!!
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
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