JB Weld and filler neck sealing- looking for a photo

[BigD_83]

Someone (Nvr2Old? Nessism?) posted a tip a while back about sealing the edge of the paint at the filler neck using some JB Weld.

There was an awesome little photo in that thread, but I have now been searching for 1/2h and cannot find it.

Does anyone remember the thread and can point me to it?

 

[SVSooke]

Someone (Nvr2Old? Nessism?) posted a tip a while back about sealing the edge of the paint at the filler neck using some JB Weld.

There was an awesome little photo in that thread, but I have now been searching for 1/2h and cannot find it.

Does anyone remember the thread and can point me to it?

Pretty sure it was Nrvr2Old,not sure where it is either.Searching his threads wouldn't help either because he was responding in someone elses thread.Add to that it has to be at least 2 years old it might be a bit hard to find.I did that to the yellow paint job because of that post.

 

[chuck hahn]

That or some clear 5 minute epoxy.

 

[BigD_83]

Pretty sure it was Nrvr2Old,not sure where it is either.Searching his threads wouldn't help either because he was responding in someone elses thread.Add to that it has to be at least 2 years old it might be a bit hard to find.I did that to the yellow paint job because of that post.

Thanks,

that meshes with my memory, but I didn't think it was that long ago. I'll have another look. I *think* I know what I'm doing, but it's always nice to see what the goal is before starting.

 

[Agemax]

here ya go ..............

http://www.thegsresources.com/_forum/showthread.php?t=177206&highlight=weld+filler+neck

 

[BigD_83]

here ya go ..............

http://www.thegsresources.com/_forum/showthread.php?t=177206&highlight=weld+filler+neck

Ha, I just found the exact one I was looking for, too!

http://www.thegsresources.com/_forum/showthread.php?t=192901&highlight=Weld

 

[chuck hahn]

Pics of Larrys work in this thread. Will probably have to change page magnification for a real close look.


http://www.thegsresources.com/_forum/showthread.php?t=181432&highlight=tank+chuck

 

[chuck hahn]

That would be my 78 C tank.

 

[Road Rash]

How is that filler neck area holding up after all this time? Cool idea, using cold weld like that. Definitely gonna do that on mine!

 

[chuck hahn]

ok so far.

 

[chuck hahn]

Best advice though is to never fill it higher than about an inch below the lower edge of the neck ( heat expansion ) and be damned well sure the cap has a tight seal so gas cant possibly slosh out!!!

 

[posplayr]

nv2old is the local expert of course, but what I did also seems to work.

After having my first paint job get gas under the clear coat when my filler neck vent hole was plugged, I modifed the tape line on the filler neck

Instead of taping off at the filler neck seam, I taped the neck off about 1/8" down below the top of the filler to make sure that I filled the seam and fully covered it with clear coat.

Not sure if the clear adheres better to JB weld or to metal but you have to cover all the paint.

By taping so high up on the neck there is no way for paint to sit at the edge of the clear (it is at a slope and the gas runs off and quickly evaporates; not so in the groove) to lift it and get under.


Looking again, what it means is you have to tape off the filler low and apply the color, and then before you do the clear remove and re tape higher on the neck. You can see some of the primer showing through. I guess I taped a little low for teh red and did not get it all covered. (it is a close up)

I probably taped off the clear partially from the inside to get virtually at the top of the neck.

 

[nvr2old]

Here's the pic that I posted in the Tips section. It seems to work really well. Not one tank that I did this to has had any problems with the fumes getting underneath..whew..



Sand the filler opening down to bare metal to the top of the tank, then mask off 1/8" on either side of the paint line before smearing the JB Weld on. It was always the very last step with me.

 

[posplayr]

Here's the pic that I posted in the Tips section. It seems to work really well. Not one tank that I did this to has had any problems with the fumes getting underneath..whew..



Sand the filler opening down to bare metal to the top of the tank, then mask off 1/8" on either side of the paint line before smearing the JB Weld on. It was always the very last step with me.

Nice work as usual. Are you thinking that the weld (seam) between the tank and the filler is leaking? I don't think that was my problem but is that is what is going on I can see why you would want something like JB weld in there.

Why not prep the tank with the JB weld and sand it like body putty and then just paint over the and then clear up to the top of the neck?

The grey doesnt look bad, just might be more traditional to not see it at all.

 

[nvr2old]

Nice work as usual. Are you thinking that the weld (seam) between the tank and the filler is leaking? I don't think that was my problem but is that is what is going on I can see why you would want something like JB weld in there.

Why not prep the tank with the JB weld and sand it like body putty and then just paint over the and then clear up to the top of the neck?

The grey doesnt look bad, just might be more traditional to not see it at all.

Actually, that would defeat the purpose..you'd then have another exposed paint edge for the fumes to get under. It's not to fill the seam as much as it is to seal the raw paint edge. That's why it's the very last step. I always tried to make it look as unobtrusive as possible and with the gas cap on, it's totally invisible.

 

[posplayr]

Actually, that would defeat the purpose..you'd then have another exposed paint edge for the fumes to get under. It's not to fill the seam as much as it is to seal the raw paint edge. That's why it's the very last step. I always tried to make it look as unobtrusive as possible and with the gas cap on, it's totally invisible.

I see, you are using the JB weld over paint and clear to protect the entire transition to the bare metal of the filler neck. Interesting

 

[BigD_83]

I see, you are using the JB weld over paint and clear to protect the entire transition to the bare metal of the filler neck. Interesting

Yes, that's the reason I'm looking to do the same. As beautiful as the paint job is, there is an exposed edge where the filler neck rolls over. I think it'll be okay to leave it as is, but a little insurance goes a long way.

 

[nvr2old]

Yes, that's the reason I'm looking to do the same. As beautiful as the paint job is, there is an exposed edge where the filler neck rolls over. I think it'll be okay to leave it as is, but a little insurance goes a long way.

I can pretty much guarantee that if you don't seal that paint edge off, below the top of the bare metal neck, the fumes will soften and then bubble up the paint all around and beyond the filler, then it's an expensive re-do paint job. This method is a very easy, and very inexpensive bit of insurance. Believe me, I learned the hard way..:-\\\

 

[posplayr]

I can pretty much guarantee that if you don't seal that paint edge off, below the top of the bare metal neck, the fumes will soften and then bubble up the paint all around and beyond the filler, then it's an expensive re-do paint job. This method is a very easy, and very inexpensive bit of insurance. Believe me, I learned the hard way..:-\\\

Not sure that is absolutely true. You can see from the picture of my filler neck that there is no evidence of lifting and that paint job is going on 3 years. I did make a point to retape the neck for my clear coat so that there was plenty of clear over the edge of the color coat. My guess is that at least PPG has a strong adhesion to the roughed up filler neck sufficient to block gas liquid or fumes formed getting under and to the paint

My first step was to tape off above the seam but well below the top of the filler neck , then after color coats removed the tape and reapplied it almost all the way to the top of the neck. I think I left the top bare so that any scuffing from the filler cap would be against metal rather than the clear.

 

[posplayr]

I can pretty much guarantee that if you don't seal that paint edge off, below the top of the bare metal neck, the fumes will soften and then bubble up the paint all around and beyond the filler, then it's an expensive re-do paint job. This method is a very easy, and very inexpensive bit of insurance. Believe me, I learned the hard way..:-\\\

Not sure that is absolutely true. You can see from the picture of my filler neck that there is no evidence of lifting and that paint job is going on 3 years. I did make a point to retape the neck for my clear coat so that there was plenty of clear over the edge of the color coat. My guess is that at least PPG has a strong adhesion to the roughed up filler neck sufficient to block gas liquid or fumes formed getting under and to the paint.

Equally as important here is to make sure your filler neck vent hole is not plugged. For those that don't know it is a small hole inside the neck.