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Old 09-02-2019, 04:15 PM   #11
teahead
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they come powdercoated? Or did you powdercoat it?

That may void the warranty right there.
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Old 09-02-2019, 05:03 PM   #12
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I have a Walbro GSL 392. Gonna go with the external set-up for now. Had to order some fittings for the external pump which won't be here for a few days.

Rinsed out my old stock tank and tested it for a leak at the drain plug...still good to go after all these years. It's too bad that Tanks Inc couldn't do a 2 minute gravity leak test! That woulda helped me out a bunch.

If the external setup doesn't work I'll move to a Holley in-tank setup using the stock tank. https://www.holley.com/products/fuel...s/parts/12-309

Last edited by hutchenc; 09-02-2019 at 05:06 PM..
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Old 09-02-2019, 05:04 PM   #13
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Quote:
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they come powdercoated? Or did you powdercoat it?

That may void the warranty right there.
They come powdercoated.
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Old 09-02-2019, 05:49 PM   #14
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Remove the pump from the tank and bench test it. Could be simply loose pin on plug. Never know till you actually test.
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Old 09-02-2019, 07:15 PM   #15
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Alright...I gotta eat my words about the pump. My dumb ass didn't plug the harness in all the way on the pump assembly itself. Had to pull it to catch that...gave it +12 volts and voila!

Stupid, stupid error on my part.

Tank still leaks.

We'll wait and see what Tank Inc says about that. I could probably have it welded if need be.

Is there any kind of sealant that I could try on that bung area that will hold up to gasoline? I can see that it's a little porous...which is certainly where the leak is.
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Old 09-02-2019, 08:37 PM   #16
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Quote:
Originally Posted by hutchenc View Post
Alright...I gotta eat my words about the pump. My dumb ass didn't plug the harness in all the way on the pump assembly itself. Had to pull it to catch that...gave it +12 volts and voila!

Stupid, stupid error on my part.

Tank still leaks.

We'll wait and see what Tank Inc says about that. I could probably have it welded if need be.

Is there any kind of sealant that I could try on that bung area that will hold up to gasoline? I can see that it's a little porous...which is certainly where the leak is.
we use this on aircraft it works great but is super sticky and stinks real bad until cured.
https://www.ebay.com/itm/CS3204-B2-F...4AAOxyHslQ72Ss
it has to cure over night
I would call tanks inc first.
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Old 09-02-2019, 09:29 PM   #17
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Yeah figured pump was good, they rarely out of box fail, now for tank.

Any sealant will fail over time even “aircraft” type. I am an FAA licensed A&P and was an IA but let it lapse, I have used them all and seen them all fail, with fuel at some point. They may last years may not. You’re just prolonging the headache till later. Fix it right vs wasting your time and money. Not to mention that stuff in the listing is 6 years out if date based on date in picture on reason its “cheap”. We used PR 1440 B2 (same spec) and it was like $100 a tube those qt are like $200 each new. So yeah it will fail especially the out date stuff. Not to mention that sealant is spec for jet A not gasoline, I have never used AMS-S-8802 spec sealant in gasoline either. New it may last long time that out of date stuff not so much.

As for the tank leaking they may “take care of it” as its a manufacturer defect. Especially if you can get pictures of suspected bad area. Maybe they will swap it out.

If they will not warranty it you need to remove powder from area you believe is leaking. Easiest way to do this is mechanical remove it. Then if its in a seem or over a weld you can use “aircraft striper” in the local area. Remove all powder. Then I would fill tank as I described with water and watch were it leaks from remove pump and pick etc.. Mark area then have a welder fix the beads. Touch up paint area effected.
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Old 09-03-2019, 11:51 AM   #18
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Hutch,

Give them a chance to make it right, and keep us posted on the outcome.

Good luck!
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Old 09-03-2019, 07:24 PM   #19
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Default Fuel delivery is better without suction.

Quote:
Originally Posted by hutchenc View Post
I could probably have it welded if need be.
Sorry you're having to deal with this.

As much as it stings to have to consider welding, it's just all around a better solution IMO.

Having a gravity fed external pump, hanging low, and soaking up road heat is generally less modern than a fully pressurized (45+ psi?) back to front fuel cooled delivery system.

A smooth sea never produced a skillful sailor.

It's your car and your rodeo, and you are certainly entitled to build it your way.
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Old 09-04-2019, 04:42 PM   #20
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OK...after much fuss, I think Tanks Inc and I have figured out what is wrong here.

I purchased this tank from a retailer and it appears that the wrong drain plug was sent with the tank. I bought it a long time ago, but I had all associated hardware in a labelled bag.

Here's the deal you all (with this same tank) should know if you happen to lose your plug or run into the same problem.

The plug on this tank is NOT a 1/4 NPT...it is a 1/4 -19 BSPT (British Standard Pipe Thread). The differences between NPT and BSPT are very subtle...differences in peaks and valleys (flat vs. rolled) as well as the thread angle (NPT is 60 degrees and BSPT is 55). You cannot tell the difference by the naked eye...you'd need to put one/both into a fitting to see what's what (or use calipers).

We're pretty sure that's what's causing the slow leak...just a subtle mis-match on the threads that even sealant resolve.

The rub is that finding one of these damn plugs is nearly impossible. Tanks has them available on their website here (http://www.tanksinc.com/index.cfm/pa...rod/prd635.htm) for a few bucks, but I was not able to find one anywhere locally. I even have a Fastenal dealer in town...they could get them, but only 20 at a time at a cost of nearly $100.

So don't lose this thing and if you think the plug you have isn't quite fitting right, check to see if it's an NPT fitting first!

My pop is a machinist so he had a tap for this thread sitting around (which is awesome) and Tanks is sending me two new plugs...I think it's gonna be ok, but even if it isn't, Tanks told me they will help me out on a new tank which is fair. Partly my fault, partly the retailer/vendor.

I'll update my original post to reflect all this I'm hoping the new plug will resolve this and I can get this thing started perhaps this weekend if I'm lucky.

Last edited by hutchenc; 09-04-2019 at 04:48 PM..
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