Continuing saga of the leaking ThermoQuad fuel bowl

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Bill Crowell

Bill Crowell

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Neither JB Weld plastic glue nor Seal All will hold the fuel bowl wells on for more than a couple of months. After that the ethanol/gas that we have around here either makes them start to leak, or the bowl well will fall completely off.

You can always tell when a TQ fuel bowl well has started to leak because first your idle goes to hell due to all the extra fuel being dumped in; then your oil pressure goes down as your oil becomes diluted; and then one day the engine will hydro-lock on fuel when you try to start it.

So I am going to give up trying to fix old TQ fuel bowls. I have found a new TQB-7 (large bore) fuel bowl on eBay, and plan to use it with my 6461S throttle plate.

It sure would be nice if this TQ played well for awhile!
 
Well well well....

Have you tried dipping/storing a dab of JB weld into a closed jar of gasoline, to see what happens over time with it (to make sure it's indeed the gasoline that's the culprit)?
Maybe it's just the prep that makes the JB fail and if that's improved then, eh, all's well? :)
 
Hey, BBM, thanks for the reply. I have talked to service reps with two carburetor rebuilders, both of whom told me that they have had absolutely no luck trying to re-glue TQ fuel bowl wells; and that they use only NOS fuel bowls, or good used and pressure-tested ones, on their rebuilds.
 
No idea. Is it somewhere that you can drill and plug it?
 
I put a Street Demon 625 on a 318 in my W100. After tuning with the calibration kit and an afr gauge it runs great. The throttle response is way better than the 1406 Edelbrock it replaced. Fuel economy is good too.
 
Point I was trying to make is why keep ******* around with it and gluing something thats submerged in gasoline hoping its gonna hold. I woulda attempted that maybe once. And upon it failing, if you cant get a new bowl or at the very least an untracked undamaged one, time for a new carburetor. Taking the chance your gonna wash out your rings or cause other engine damage with it. Just replace it with a new carb.
 
moparmat2000 said:
Point I was trying to make is why keep ******* around with it and gluing something thats submerged in gasoline hoping its gonna hold. I woulda attempted that maybe once. And upon it failing, if you cant get a new bowl or at the very least an untracked undamaged one, time for a new carburetor. Taking the chance your gonna wash out your rings or cause other engine damage with it. Just replace it with a new carb.
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If you had read my first post, you would have known that I have ordered a new fuel bowl.
If you don't understand why people prefer Thermoquads, then you need to learn more about carburetors. Start by researching the Carter AVS, which was banned from NASCAR because it kicked so much butt, and then note how the TQ is just the consumer version of the AVS.
 
"I really don't care to know anything about thermo quads"

OK, but do remember that spread-bore beats square-bore any day of the week.

Mopar kicked GM's and Ford's butts in NASCAR racing when using the spread-bore AVS on its hemi and 440 wedge racing engines. GM and Ford had to maintain their contracts with square-bore carburetor manufacturers, and they could not easily switch over to spread-bore. So they went crying to the NASCAR administration instead, threatening to withdraw from NASCAR racing unless the AVS carb was banned, and NASCAR complied. (Just one of the ways that NASCAR screwed Chrysler over, and that made Chrysler eventually drop out of NASCAR.)
 
Wasnt sure how serious he was about these carbs. Thought I was offering a solution. I played around with thermoquads back in the 80s. Pre internet Once they got hard to buy parts for em back then, I kinda gave up, went to something else. If you can actually get parts for em now, then great.
 
Someone on another forum recently asked about gluing TQ bowls and someone replied that the only adhesive that will work is Loctite 401. Need to let it cure in open air for 24-48 hours before getting it wet. I'd love to run a TQ again but they seem like a $$$/PITA compared to the other options that are out there.
 
Thanks man !! Back atcha rumble.

Not sure about loctite 401, but loctite super bonder 409 is really just fancy super glue.
 
moparmat2000 said:
Thanks man !! Back atcha rumble.

Not sure about loctite 401, but loctite super bonder 409 is really just fancy super glue.
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If you try it... let us know!

gzig5 said:
I do, but not that bad. ;-)
Maybe someday after I retire and have more time to fiddle with it.
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Oh I hear ya loud and clear on that one. A few years back, I gave up on some pursuits. To busy doing what’s needed first with never enough time to finish that list never mind what I wanted. So I set out and started collecting parts for future usage. I gathered an interesting collection of junk. I love to tinker more than anything.

2 more years until retirement and the tinkering begins again. With pretty much but a butt load of nothing but time on my hands, I’ll be doing some weird, crazy and outlandish stuff because I can. Will it make sense?
Who cares!
LMAO!
 
ever tried welding them with a soldering iron and nylon tie-wraps. Not sure of the plastic formulation.
image_23017.jpg

looks like these are in stock, but are kinda steep

Thermo-Quad Fuel Bowls - Carburetor Parts & Kits for Carter, Ford Motorcraft, Holley & Rochester Carburetors
 
rumblefish360 said:
If you try it... let us know!



Oh I hear ya loud and clear on that one. A few years back, I gave up on some pursuits. To busy doing what’s needed first with never enough time to finish that list never mind what I wanted. So I set out and started collecting parts for future usage. I gathered an interesting collection of junk. I love to tinker more than anything.

2 more years until retirement and the tinkering begins again. With pretty much but a butt load of nothing but time on my hands, I’ll be doing some weird, crazy and outlandish stuff because I can. Will it make sense?
Who cares!
LMAO!
Click to expand...
Right behind ya brother. 62 I'm done with airplanes
 
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