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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51156
Location: Surrey B.C. Canada, but thinking of Ukraine
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 Posted: Fri May 27, 2016 10:13 pm Post subject: Re: Stranded on the way to ALASKA! |
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| HastaAlaska wrote: |
| Are you saying that a gasoline safe sealant doesn't exist? |
None that I can imagine for that particular application, you could goop it in with something but what will you do roadside if that injector ever acts up?, it'll most likely be glued in there for life, or if you go with one that stays soft will it get sucked in and your next video is a roadside update in the middle of nowhere with a burnt piston?. How much of a gambler are you?
How about some pics of the offending seals as well as where they go so we can contemplate a possible alternate method?
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aeromech
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Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Fri May 27, 2016 10:20 pm Post subject: Re: Stranded on the way to ALASKA! |
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We used a product called prc for fuel tank sealant but as busdaddy says if you use it you'll never be able to get it apart
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Wildthings
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Joined: March 13, 2005
Posts: 50353
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| Posted: Sat May 28, 2016 4:05 am Post subject: Re: Stranded on the way to ALASKA! |
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Just use some high temperature silicone on it and let it set up from 24 hours before exposing it to any fuel. Won't last forever but should work for a while. Maybe you could find a nice fat o-ring at your FLAPS that would give a tighter fit than the seals you have now?
Last edited by Wildthings on Sat May 28, 2016 10:05 am; edited 1 time in total |
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Manfred58sc
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Joined: October 05, 2009
Posts: 3382
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| Posted: Sat May 28, 2016 6:48 am Post subject: Re: Stranded on the way to ALASKA! |
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OK, I have used "Seal-all" (comes in a tube, about $5) in the past. Its an old school formula that works well and is not permanent. JB WELD is also very fuel resistant but that will be a one time shot. Good luck!
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williamM
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Joined: August 07, 2008
Posts: 4333
Location: southwest Arizona
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| Posted: Sat May 28, 2016 12:14 pm Post subject: Re: Stranded on the way to ALASKA! |
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| Manfred58sc wrote: |
| OK, I have used "Seal-all" (comes in a tube, about $5) in the past. Its an old school formula that works well and is not permanent. JB WELD is also very fuel resistant but that will be a one time shot. Good luck! |
X2 on seal all- we used to patch batteries with it back in hard times- only thig sticking to those cases and acid resistant.
Brings to mind another sealant- "Glovit" used outside aluminum rivet boat hulls for wear resistant seal.- again- not getting it loose with a knife.
Like he Ace hardwear "o" ring solution.
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Manfred58sc
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Joined: October 05, 2009
Posts: 3382
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| Posted: Sat May 28, 2016 7:18 pm Post subject: Re: Stranded on the way to ALASKA! |
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The o-ring must have fuel resistant properties or it will be mush-ola with the ethanol blends. There may be oil-field supply shops in the area with the proper quality.
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Wildthings
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Joined: March 13, 2005
Posts: 50353
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| Posted: Sat May 28, 2016 9:11 pm Post subject: Re: Stranded on the way to ALASKA! |
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Isn't it time to change the title of this thread to "Stranded in Alaska".  |
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HastaAlaska
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Joined: November 22, 2012
Posts: 1420
Location: Off Grid
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cdennisg
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Joined: November 02, 2004
Posts: 20279
Location: Sandpoint, ID
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| Posted: Mon May 30, 2016 3:24 pm Post subject: Re: Stranded on the way to ALASKA! |
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| HastaAlaska wrote: |
Withstands temperatures to 300°F (149°C). Do you think that the injectors will get hotter than that? |
Your injectors mount into the intake manifold ends, right? If so, then they likely won't get that hot. If they mount in the heads that's another story.
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hopkin 
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Location: Ottawa, Ontario
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| Posted: Mon May 30, 2016 4:49 pm Post subject: Re: Stranded on the way to ALASKA! |
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Edit........
The injectors are NOT mounted in the top center of the head. Here's a photo showing the same type of head that Ben has. This photo shows where the spark plugs go!
See below for the picture I meant to post.
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Last edited by hopkin on Tue May 31, 2016 1:08 pm; edited 4 times in total |
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Manfred58sc
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Joined: October 05, 2009
Posts: 3382
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| Posted: Mon May 30, 2016 5:50 pm Post subject: Re: Stranded on the way to ALASKA! |
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300 degree threshold should be fine, permatex stuff is good quality. A bit of a hippy fix, but I understand funds and location limit options at times. Did you hone and re-ring the jugs? Thanks for the update.
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timvw7476
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Joined: June 03, 2013
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Location: seattle
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| Posted: Mon May 30, 2016 6:56 pm Post subject: Re: Stranded on the way to ALASKA! |
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| Wildthings wrote: |
| Isn't it time to change the title of this thread to "Stranded in Alaska". |
The way they're assembling it, looks like it's heading south for the winter.
Nice save on the fire! |
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Ian
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Joined: August 28, 2002
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| Posted: Tue May 31, 2016 8:58 am Post subject: Re: Stranded on the way to ALASKA! |
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| hopkin wrote: |
The injectors are mounted in the top center of the head. Here's a photo showing the same type of head that Ben has:
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There's so much bad info in this thread it's giving me a headache. The arrows shown in this pic point to the spark plug holes. The injectors on ALL fuel injected AIRCOOLEDS mount on the intake manifolds on either side. Gluing them in is hilarious, and so is gluing the mainseal.
Good luck.
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airschooled
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Joined: April 04, 2012
Posts: 12728
Location: on a bike ride somewhere
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| Posted: Tue May 31, 2016 9:28 am Post subject: Re: Stranded on the way to ALASKA! |
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I agreed with your whole post, but have nothing to say other than what I quoted....
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Manfred58sc
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Joined: October 05, 2009
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| Posted: Tue May 31, 2016 12:11 pm Post subject: Re: Stranded on the way to ALASKA! |
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Kind of a poor picture, I assumed they were intending to show the intake injector position, not the spark plugs. (Lets hope). Gluing the main seal is no-no in my book for sure. Short cuts are dicey. Not like I have not done them in the past mind you. I dropped a valve years ago, pulled the head, removed offending valve,plugged the hole and ran it as a dead cylinder. For 800 miles to get home. It was ugly, lots of gas in the oil, 40 mph top speed. I guess we all do best we can in any given situation. Since the Bus only has to get another 2K miles before its given away, many of our concerns probably fall outside the scope of this project. Best of luck as always.
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hopkin
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Joined: June 25, 2012
Posts: 2480
Location: Ottawa, Ontario
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| Posted: Tue May 31, 2016 12:59 pm Post subject: Re: Stranded on the way to ALASKA! |
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D'oh!
Apologies for the wrong picture above, I was trying to find a good picture of where the injectors are connected to the manifold intake.
I'll try again  :
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SGKent
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Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Tue May 31, 2016 1:13 pm Post subject: Re: Stranded on the way to ALASKA! |
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| Quote: |
| Are you saying that a gasoline safe sealant doesn't exist? |
Used to be the answer was yes. Those sealers like Permatex 2B and the 600F industrial version were safe. But they were alcohol solvent based. Now with alcohol in fuel they slowly dissolve. RTV swells and leaks when it comes into direct contact with gasoline. The good news is that the injectors spray away from the seal so all the seal area gets is fumes. I'd use the non-hardening Permatex 2B.
That said Permatex has a new fuel resistance gasket dressing and flange sealant but I have not tried it. It says it is gasoline and ethanol resistant as well as non-hardening. One of the automotive or tractor supplies up there might have it. You can be the guinea pig trying it if they do.  https://www.permatex.com/products/gasketing/permat...e-sealant/
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Tom Powell
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Location: Kaneohe
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| Posted: Tue May 31, 2016 1:46 pm Post subject: Re: Stranded on the way to ALASKA! |
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DAGNABIT
I've always used Permatex #3 Aviation Gasket Sealer. That's what the C-124 flight engineers and mechanics recommended. The older it is, the better it gets. Now I'll have to buy new stuff and the good old cans will go to waste.
Is it true that gasket sealers are made from a resin secreted by the female lac bug, on trees in the forests of India and Thailand and this it why it is called she-lac? 
Aloha
tp |
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51156
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Tue May 31, 2016 3:47 pm Post subject: Re: Stranded on the way to ALASKA! |
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| Tom Powell wrote: |
| Is it true that gasket sealers are made from a resin secreted by the female lac bug, on trees in the forests of India and Thailand and this it why it is called she-lac? |
Close, it's made from the shells of the Lac bug, hence the name Shellac, great stuff until they started putting moonshine in gasoline since it's thinned with alcohol.
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Tom Powell
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Location: Kaneohe
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| Posted: Tue May 31, 2016 4:53 pm Post subject: Re: Stranded on the way to ALASKA! |
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| busdaddy wrote: |
| Tom Powell wrote: |
| Is it true that gasket sealers are made from a resin secreted by the female lac bug, on trees in the forests of India and Thailand and this it why it is called she-lac? |
Close, it's made from the shells of the Lac bug, hence the name Shellac, great stuff until they started putting moonshine in gasoline since it's thinned with alcohol. |
A day that will go down in the history of TheSamba:
31 May 2016 BUSDADDY WAS WRONG   
https://en.wikipedia.org/wiki/Shellac
"Shellac is scraped from the bark of the trees where the female lac bug, Kerria lacca (Order Hemiptera, Family Kerriidae), also known as Laccifer lacca, secretes it to form a tunnel-like tube as it traverses the branches of the tree."
Thanks for all the good information you've given us.
Aloha
tp |
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