heat the metal around the stud to expand the hole, and then touch an ice cube to the stud to cool and shrink the stud
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heat the metal around the stud to expand the hole, and then touch an ice cube to the stud to cool and shrink the stud
I'm a little nervous about melting the aluminum with Mapp... figure I'll just monitor it with my infrared gun to about 500-600f?
I also picked up some alum today... because... I'm tempted lol
I couldn't resist.
https://i.imgur.com/2V9kp3Oh.jpg
Sadly the alum experiment was unsuccessful. I couldn't keep enough heat in the solution in an unheated shop where the entire motor was acting as a heatsink. When I added near-boiling water I did some some bubbling from the stud and it appeared to be having a reaction, but the water rapidly cooled to room temp and the alum just crystallized all over the stud.
I waffled over changing the test to crank more heat but got impatient. Drilled out both bolts and helicoiled, only took a few hours and went pretty smooth.
https://i.imgur.com/kemsC0D.jpg
Since the threads run deeper than the coils I was thinking about adding a tiny bit of JB Weld to keep them from spinning.
Still fascinated by the alum experiment and I'll revisit it someday!
Normally in that case you thread the inserts as deep as they will go, and snap off the tang. Then thread another insert on top of the first till it bottoms, snap off the tang, cut the excess coil flush.
Solid work. Make sure you anti=seize the piss out of the new bolts
Man I was on the fence about that. I'm using a cheap helicoil kit and the tangs almost never break off clean (or maybe I just have poor technique). I decided the chances of me ruining it completely and pulling the coil out were too high so I just flushed the insert and called it good. If it gives me an issues I will pull the inserts and try doubling them up.
Or, if you have a deep hole that needs to coiled you buy a longer heli-coil. They come in many lengths, typically 1x, 1.5x, 2x etc. the diameter of the bolt hole you are coiling
^ this guy knows about deep holes