Seized threads on aluminum

[Ian in Mississauga]

Sorry, not model A related. I am trying to take apart a threaded joint on an old aluminum gas light and its seized. I have it soaking in acetone-atf solution. Any advice?
TIA Ian

[Kurt in NJ]

heat and vibration(hammer taps)

if the head is buggered --welding a blob on the head and letting it cool---a big old red hot blob will heat down aways and loosen the corrosion bond----sometimes I will do this even if the head is good

[tbirdtbird]

agree with heat. aluminum galls so easily....good luck. You may end up partially destroying the threads no matter what. when you reassemble, be sure to use some never-seize

[Mitch//pa]

A perfect job for my mini inducter II

[noboD]

What size screw?

[tbirdtbird]

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OK, I give up Mitch, what is a mini-inductor? does it apply AC across the parts? we used to do that with stick welders.....hook the elctrodes up across the seized parts and let that AC alternating current buzz thru there and heat it up at the same time

[Tinbasher]

If you can get the nut off of the thread. Then you can get a piece of thin wall tube that will just fit over the collar. Then using a pair of vise grips grab the tube and work it back and forth forcing it down between the the aluminum housing. Working the tube will act like a saw and cut out the corrosion. Not fast but it works. This was the only way we could get a aluminum head off of a engine.
John Poole

[Bob C]

Here it is.

Bob

[Mike V. Florida]

Originally Posted by tbirdtbird

OK, I give up Mitch, what is a mini-inductor? does it apply AC across the parts? we used to do that with stick welders.....hook the elctrodes up across the seized parts and let that AC alternating current buzz thru there and heat it up at the same time

http://www.theinductor.com/induction...ls/md-700-110v

[Mitch//pa]

The best 400 I ever spent. Every restorer / shop should have one
We hardly use a flame anymore

Dave put it on ya XMAS list

[ronn]

A perfect job for my mini inducter II

oh no, not the mini inductor II....................!



sounds like a nuclear war weapon!!!!!!!!!!!!!!!!!!!!!!!!

[gweilbaker]

Does the mini inductor II work with aluminum? I thought ferrous metals reacted to induction.

[Mitch//pa]

Originally Posted by gweilbaker

Does the mini inductor II work with aluminum? I thought ferrous metals reacted to induction.

Yes it heats aluminum without distorting / melting the metal as you would get with a torch..
I just heated this aluminum sleeve it got super hot....

[Big hammer]

Does the part your heating up need to be inside the coil?

[Mitch//pa]

Originally Posted by Big hammer

Does the part your heating up need to be inside the coil?

It works best surrounding the piece being heated... There are different sizes and lengths available including universal wrap around ones ..see the pic
I purchase an aftermarket cheaper coil set not through mini inductor,,, Amazon has them..

The coil can be above the fastener also still heats it just takes longer

Most fasteners do not need to be heated till its red hot for removal... Usually just a 30 second hit works

[Cool Hand Lurker]

Originally Posted by Ian in Mississauga

Sorry, not model A related. I am trying to take apart a threaded joint on an old aluminum gas light and its seized. I have it soaking in acetone-atf solution. Any advice?
TIA Ian

I am not trying to insult anybody, but the original question was not how to get a stuck steel bolt out of an aluminum threaded hole. It sounded to me like it was an aluminum pipe going into an aluminum coupler. Maybe I am wrong but I think the only good answer was to use the induction heating method that Mitch uses. Yay, Mitch.