Stripped fuel Nut Qjet

SmokinBBC

SmokinBBC

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Joined
Mar 25, 2008
Messages
2,730
Location
Oak Ridge, NC
Changing the filter today, I somehow stripped the inside of the carb. I was not gorilla tightening either. The fuel nut is the original one.

I've heard of a slightly oversize nut that is self tapping. Anyone know where it can be had?

Bummer:(

'70 7040205
 
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Why not remove the little crappy filter and epoxy in the nut, then use a remote filter somewhere upstream?
 
Check at your auto parts store. You'll need to find an older partsman than knows what a carb is. There used to be a company named 'Thexton' that made repair parts for the q-jet inlets among other things. You may also find a repair part in the 'Blue Streak- Hygrade' catalogue. At one time fairly common stuff. Let us know how that works out...........
 
Bought one at NAPA auto parts 2 years ago. Luckily the parts person was experienced and knew about them. Sure beats getting the deer in the headlights look!
 
As the decades flew by, i'ts been harder and harder to find anything to do with much of anything in the way of a carb, unless it's a freeking Holley....

So in about '92-3 or so I had made up my mind to learn FI from scratch....

Methinks that since most all factories went DPFI some 20+ years ago, it's time to keep up with the times....

now a daze it's the parts are getting so scarce, the fuels are changing, the entire 'thing' with carbs is coming to a close, when even stalwarts like Holley come out with FI setups of some description or other, the handwriting is on the walls....

:quote::eek::surrender:
 
SmokinBBC said:
Changing the filter today, I somehow stripped the inside of the carb. I was not gorilla tightening either. The fuel nut is the original one.

I've heard of a slightly oversize nut that is self tapping. Anyone know where it can be had?

Bummer:(

'70 7040205
Click to expand...

The oversize self tappers are available at many auto parts stores but the metal in your carb is probably starting to erode. The self tapper is an OK one time fix but the next time you try to remove it to replace that little filter you could be back where you are now. I would go for the epoxy that TT talked about with a flex type connection at the carb so you never have to stress the large connection again.
 
I found this on another site from Cliffs:

The only permanent reliable/effective repair is to install a heli-coil insert, it is stronger than the original material. You do loose a tiny amount of sealing surface for the gasket, but we've never had a problem with them sealing up.

This repair should only be done by someone highly skilled with the correct equipment to make sure the filter housing is in correct alignment with main body for even contact all the way around the seal.

Using the expanding fittings is NOT recomended, they can come out, and burn your expensive restoration or Muscle car to the ground. They also swell up the carb and make installing a heli-coil and getting a good seal at the housing more difficult.

Same thing with oversize fittings, they chew up good material used to seat the heli-coil insert.

We charge $45 plus shipping for this repair, and have done hundreds of them without any problems. The only carburetors which do NOT take this repair well, are very early 1967 units that have had an expanding fitting in them at any point, as they are extremely thin in this area to start with.

We can also "spot face" the front of the housing if the seal area is damaged (common problem), and can machine off a small amount of the casting if an expanding fitting has it swelled up to much to get an effective seal at the gasket......Cliff

cliffshighperformance.com
 
Don't do the self-tapping oversized fittings. They are only marginally oversized, and they will not provide a permanent repair in the eroded metal in the inlet. They will also put a ton of debris into your carb, and will more often than not cause jamming of your needle/seat assembly. By the time it's time to change the filter, it will strip out again.

JB Weld... I hope you people are kidding...

The only method to correctly repair the inlet is with one of the specially-made helical inserts. Since the threads are not standard size, HeliCoil does not actually make the parts - they are made by a thread company in Califonia and sold through authorized distributors.

As outlined in my service literature, I have procured all the tooling and the correct coils to do the repairs the right way. I have done hundreds of them with 100% success.

You can e-mail me for info if you don't have my info sheet.

Lars
[email protected]
 
In defence of my suggestion I will say that I sold 100's of them over the years with good results. Yes if one was to be sloppy of course they could end up with debris in the carb, the same possibility holds true with many types of repairs. The filter can still be changed if one is not a gorilla about it. There are not many carb guys around anymore and in my experience there was never was many set up up to re-bush throttle shafts much less repair fuel inlets. Buying a rebuilt carb was just too easy. If smokin can find a tech to do this repair in his area that obviously would be the best way to go but if he can't then I would use a repair kit in a heartbeat.
 
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Well, they sure don't have the needed helical insert here so what else but to use epoxy. Carb has worked fine since..so what if that crappy little filter is gone. Better than a fuel spill and a fire.
 
00fxd said:
I will say that I sold 100's of them over the years with good results.
Click to expand...
Twin_Turbo said:
Well, they sure don't have the needed helical insert here so what else but to use epoxy.
Click to expand...

I understand the shortcomings of service resources for American cars in Europe - that's why I do a lot of carbs and services for the European enthusiasts. You European guys face some real challenges, and I admire your innovativeness.

I don't understand taking temporary shortcuts here in the States when correct repairs are readily available and affordable.

You can "repair" the carb any way you want - I've seen JBWeld, oversized fittings, O-Ring fittings, teflon tape, 5-minute epoxy, plumber's goo, metal sleeved inserts, and other things that can't be mentioned on a public forum. If you want it done right, just send me or Cliff the carb and we'll install the correct stainless threaded coils for a correct, permanent repair. Cliff charges $45. I charge $50. You got $25,000 wrapped up in your car. Do I need to review this math with you guys? This ain't that tough.

Geez...

Lars
 
lars said:
00fxd said:
I will say that I sold 100's of them over the years with good results.
Click to expand...
Twin_Turbo said:
Well, they sure don't have the needed helical insert here so what else but to use epoxy.
Click to expand...

I understand the shortcomings of service resources for American cars in Europe - that's why I do a lot of carbs and services for the European enthusiasts. You European guys face some real challenges, and I admire your innovativeness.

I don't understand taking temporary shortcuts here in the States when correct repairs are readily available and affordable.

You can "repair" the carb any way you want - I've seen JBWeld, oversized fittings, O-Ring fittings, teflon tape, 5-minute epoxy, plumber's goo, metal sleeved inserts, and other things that can't be mentioned on a public forum. If you want it done right, just send me or Cliff the carb and we'll install the correct stainless threaded coils for a correct, permanent repair. Cliff charges $45. I charge $50. You got $25,000 wrapped up in your car. Do I need to review this math with you guys? This ain't that tough.

Geez...

Lars
Click to expand...

Wow $50 can't beat that for a repair done right. I did a 69 7-8 years ago,epoxied the nut and pinned it top and bottom. Little filter naturally wasn't an issue and the car was in a month ago for a heater core leak but the fuel inlet was still leak free, guess I got lucky.
 
This reminds me of my Dads '68 Firebird that the dealer stripped this on his car.. Thier fix?? Epoxy it back in the carb... If it's good enough for a dealer repair, it must be GM approved...
 
Lars did the insert and I installed the carb today. Fuel line is good and no leaks....well after some careful tightening...didn't want to over tighten and screw up the fix!

The insert looks good and appears to blends in the opening very nicely.

Thanks Lars!




Ohhhhhh and mental note to self....check to make sure the shipping clerk types in the address CORRECTLY:censored:
 
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