JB weld - stable in gas?

[pano]

It says you can repair gas tanks with it. Any experience with JB wels in full contact with gasoline?

[jfrankenbiker]

I have used it to repair a rust hole in a gas tank. It workd fine and is still holding after 10 years. Seal All also works well for pinholes and cracks. If you use either of these products, I suggest you clean the rust from around the area first.

The tank I repaired with JB Weld had a pinhole from rust. I drilled the hole out to about 1/16 inch then forced the mixed epoxy into the hole. I then turned the tank so that the hole was facing the floor and put a piece of tape over the hole so the epoxy couldn't run out. This also allowed the epoxy in the tank to spread out over a larger surface around the hole. After the epoxy cured, the little that was on the outside of the tank around the hole cleaned up well with a bit of sanding.

[earlfor]

I once tried JB for sticking a broken post together in a float bowl. It was a waste of time. It held for a day. LOL Used to repair/cover a pinhole in a gas tank, it has worked fine.

Earl

It says you can repair gas tanks with it. Any experience with JB wels in full contact with gasoline?

[pano]

I once tried JB for sticking a broken post together in a float bowl. It was a waste of time. It held for a day.

Earl

Did you ever find a good solution for fixing a broken float post? My application is VERY similar.

[first timer]

i use jb to fix my broken post it lasts about 2 years for me then i need to do it agian. i am sure there are better ways

[earlfor]

The only thing I found that lasted would only work if the post had been broken in nearly even halves. I filed both of the broken/jagged ends of the post so I had two flat ends. Then with small drill bits, drilling in steps, work up to a hole large enough to thread a short length of 4/40 rod into.
(cut the head off a short 4/40 bolt to make a 4/40 threaded rod). That let me rejoin the post halves and with the threads, I could adjust the overall post length so that the float pin lined up between/across the posts. Set the rod into the posts with red loctite. I never had to redo one.

Earl

Did you ever find a good solution for fixing a broken float post? My application is VERY similar.

[rpickle]

I had my post welded at the machine shop down the road from me. Looked ugly and had to grind some off in order for it to all fit together, but I am sure it will last a good while. Truely hasn't been system tested yet. Bike is still being resurected.

Has anyone ever filled the pits on a caliper piston with JB Weld? Curious, since the one I currently have apart has a handful of them.


Rick

[gustovh]

Just brok a post on my #4 carb 550L. Had a spare rack of 750 L carbs, removed #4 put the guts from the 550 carb into it and will install it into the rack tomorrow. Will let you know how that works out.
V

[t3rmin]

When I broke a float post and my JB Weld repair failed, I drilled a little hole in each end and inserted a slightly larger section of a nail then jammed it all together for a good tight interference fit. That held.

[spyug]

I don't know about JB Weld being impervious to gas as I have never used it. Another product that does work with gas is plumber's epoxy putty available at Home Depot or plumbing supply places. It is a two part epoxy in a putty format. When mixed together it hardens to almost stone . It can be drilled and sanded.

I know that this works as I made a sample and immersed it in gas for over 2 weeks. there was no deterioration. Subsequently, I filled holes in my 650's gas tank which are holding well over 18 months later. I also used it to sort out some pin holes in my GS's gas tank as well.

I think you could use it for a repair inside a carb as I know folks on the XS board have fixed some cracked float bowls with it.

Cheers,
Spyug.

[tfb]

If 'JB Weld' is an epoxy compound (and forgive my ignorance here folks, but it's not a product we get by name here in Oz!), then technically it should hold its own in gas. But if your surfaces are not *absolutely* clean, then it'll let go.

Some ingenious work mentioned in earlier entries, chaps, for fixing broken float posts. Good stuff.

[t3rmin]

Yeah JB Weld is epoxy. Has aluminum bits suspended as well I believe.

[maxpower_hd]

I used JB Weld on an FJ1100 tank a while back and it worked OK. It didn't last forever but it did last a couple of years.

My buddy tried it on his tank and it only lasted a few months. He ended up having someone weld his for pretty cheap money and it's been fine ever since.

[rustybronco]

Has anyone ever filled the pits on a caliper piston with JB Weld? Curious, since the one I currently have apart has a handful of them.
Rick

a bike that won't go won't kill you, one that won't stop...
Don't.

[earlfor]

Bad idea! Most likely a quick way to be on your face, sliding across some asphalt.

Earl

[quote=rpickle
Has anyone ever filled the pits on a caliper piston with JB Weld? Curious, since the one I currently have apart has a handful of them.


Rick[/quote]