Tiny stud extractor

[Quickstep192]

I need to remove a 4mm steel stud from a cast aluminum carburetor. (See pic)

I see lots of stud extractors online, but none that small.

Any ideas?

 

[Leaflessshadetree]

Double nut them. Wrench on the bottom nut to back them out.

 

[PoorUB]

If the threads are trashed, well a nut onto the stud.

 

[Quickstep192]

I should have mentioned - the threads are trashed and I don’t have welding gear.

 

[Firebrick43]

Vice grips then if the are trash or a few nuts locked together.

 

[BillK]

Vice Grips like FB said.

 

[Quickstep192]

The studs must be hardened, because vise grips don’t seem to grab. Although maybe a newer pair would grab better.

 

[RoninB4]

A very small (miniature?) pipe wrench may bite the stud better if it has hardened jaws. About $10 or so. You can also try a single wrap of coarse grit paper on the stud (grit side on the stud) and try your vise grips again.

 

[Firebrick43]

Also heat the studs up with a propane torch. A lot of time studs are put in with loctite. All forms of loctite will release at 400 degrees.

 

[66Caprice]

JB weld some nuts onto it. Do you have a grinder? You could grind two flat spot's so you can get a wrench onto it.

 

[wssix99]

Go to the hardware store and get 2 jam nuts and then double nut it. The jam nuts are half-depth and you should have enough threads there do double nut that way. Or maybe you have enough thread for one regular nut plus one jam nut?

 

[PCustoms]

Go to the hardware store and get 2 jam nuts and then double nut it.

Really?

I should have mentioned - the threads are trashed and I don’t have welding gear.

 

[Shiftless]

You might be able to re cut those threads with a thread cutting die and not have to remove the stud.

 

[garfunkle24]

Mis post

 

[PCustoms]

@Quickstep192 what is this on, and do you know how the studs are held in? I.e. are they left hand threads or knurled/pressed....

Have you headed the stud at the base? This will break any thread locker or corrosion.

 

[wssix99]

Really?

Look at the picture.

 

[PCustoms]

Look at the picture.

Thanks, would never understand how to jamb 2 nuts together without that wonderful image.


Now look at the quote and explain to me how he's going to get those 2 nuts on the mangled threads.

 

[Worsedog]

The studs must be hardened, because vise grips don’t seem to grab. Although maybe a newer pair would grab better.

Tighten the adjusting screw some more and squeeze the grips with a pair of channel locks.

 

[mreisner]

As mentioned before, a tiny pipe wrench, especially a good one can get one out of lots of jams. Every mechanic should have one.

 

[firebirdparts]

Lots of good advice in this thread. FWIW I've never extracted studs with a stud extractor. In Industry I just never heard of doing that. We used nuts. Most of the time channel locks to remove 1 inch and larger, as there's usually no reason they'd be hard to remove. If you can't get a bite with vice grips, I would just grind some flats on the one you want to remove. I would also encourage you to rethead it and leave it in.

 

[wssix99]

Now look at the quote and explain to me how he's going to get those 2 nuts on the mangled threads.

There is a short section of good threads behind the chewed up ones. Not enough for two normal nuts, but plenty of good threads for two jamb nuts. Maybe one normal nut and one jamb nut.

Only the threads at the very end are chewed.

 

[BurtEggley]

put some liquid wrench down on the threads where it is attached to the manifold. Several places like Project Farm did tests of all sorts of penetrating fluids, and it did best. Then double nut it. If you have messed up the threads buy a die and retap it. Or as others have said, use a small pipe wrench on it. You may want to heat the bottom. Do not put so much pressure on it that you snap it.

 

[Jack Ryan]

I need to remove a 4mm steel stud from a cast aluminum carburetor. (See pic)

I see lots of stud extractors online, but none that small.

Any ideas?

I haven't tried this but it covers 4mm

https://www.tetools.com/No.8544-1-4-Drive-Impact-Stud-Extractor-Chuck

Jack

 

[KwikFab]

You in CA? If so, bring it over and we'll get it off with a nut welded on top.

 

[Quickstep192]

Thanks for the ideas. The tool Jack referenced gave me an idea…

After biting the bullet and removing the carb for better access, I tightened a keyless chuck onto the stud. I turned it by hand. It made a little clicking sound as it first turned, then came right out.

As soon as the new parts come, I should be back in business!

Thanks again for the help.