04-05-2018, 09:34 PM
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#16
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Real Name: Scramble
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Quote:
Originally Posted by rallypoint_1
Sounds like Tim should make a vid on this!!!  |
On what? Kolelts hole reaming? 
Quote:
Originally Posted by mtbtim
You said exactly what I was thinking too. I know the application of heat to remove stubborn parts is pretty common and if it ended up causing failures we'd definitely hear about it.
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Most of the time we're only trying to expand a nut to get it off a bolt or stud with mapp or propane. If we use oxy/acyl most likely we're cutting that part off & not re-using it.
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04-05-2018, 09:40 PM
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#17
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Join Date: Jul 2015
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Quote:
Originally Posted by Scramble
On what? Kolelts hole reaming? :
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Yikes!!
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04-05-2018, 10:19 PM
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#18
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Quote:
Originally Posted by Scramble
On what? Kolelts hole reaming?
Most of the time we're only trying to expand a nut to get it off a bolt or stud with mapp or propane. If we use oxy/acyl most likely we're cutting that part off & not re-using it. |
I’m not reaming any holes on my truck lol. At work. When you have a connection that a bull pin or barrel pin does not fix it. You next choice is a reamer.
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04-05-2018, 10:28 PM
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#19
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Have used oxy/ace for over a decade with no problems to speak of, though I have always heard and used MAP wannabe gas on rusty O2 sensors and not oxy/ace due to the latter being able to contort the bung hole.
A gas ax is one lovely tool to own in one's arsenal though for
@ mtbtim
, the MAP kit would probably suffice for all his needs.
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04-05-2018, 11:18 PM
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#20
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Quote:
Originally Posted by mtbtim
Thanks for all the responses. Sounds like to me it's fine to use some heat to remove parts as long as we aren't getting parts red hot and then rapidly cooling them (quenching) which will make the metal more brittle.
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Your not getting it anywhere near hot enough to temper, anneal, normalize, Or harden it. Just think about how much heat goes into the steel when they weld it. The only reason I don’t like to heat things is because it tends to burn the paint off. You might in extreme cases put enough heat into it to case harden a very small part of it.
https://youtu.be/KFdFsfSAuyc
This is a fantastic trick, I have used it a bunch of times. On mufflers, a friend bet me $20 I could not get his 20 year old rusted exhaust bolts off. With this trick they came right off. It’s seriously like magic.
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04-05-2018, 11:42 PM
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#21
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Quote:
Originally Posted by sleepydad
Your not getting it anywhere near hot enough to temper, anneal, normalize, Or harden it. Just think about how much heat goes into the steel when they weld it. The only reason I don’t like to heat things is because it tends to burn the paint off. You might in extreme cases put enough heat into it to case harden a very small part of it.
https://youtu.be/KFdFsfSAuyc
This is a fantastic trick, I have used it a bunch of times. On mufflers, a friend bet me $20 I could not get his 20 year old rusted exhaust bolts off. With this trick they came right off. It’s seriously like magic. |
I need to try that trick out.
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04-06-2018, 12:29 AM
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#22
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I think I took a metallurgy course once and from what I remember you have to heat it way up until it's pretty much red hot to change the crystalline structure of it which is what will affect strength. If you do get it that hot then it may make it weaker, but not more brittle. It would bend easier which means it would probably be less likely to catastrophically break. That's assuming the metal was hardened to begin with which I think would be unlikely.
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04-06-2018, 08:17 AM
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#23
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Quote:
Originally Posted by mtbtim
I need to try that trick out.
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Ditto
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04-06-2018, 09:18 AM
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#24
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Quote:
Originally Posted by sleepydad
https://youtu.be/KFdFsfSAuyc
This is a fantastic trick, I have used it a bunch of times. On mufflers, a friend bet me $20 I could not get his 20 year old rusted exhaust bolts off. With this trick they came right off. It’s seriously like magic.
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Have done this before a few times and I wouldn't say it's magic but definitely a tool in the box. Last time I did this I still had to use oxy-propane and a lot of it to get the nut off.
And to the original post- that was quite a bit of heating on the axle of an ATV, and that quad has seen plenty of use since with no issue.
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04-06-2018, 09:22 AM
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#25
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Quote:
Originally Posted by sleepydad
Your not getting it anywhere near hot enough to temper, anneal, normalize, Or harden it. Just think about how much heat goes into the steel when they weld it. The only reason I don’t like to heat things is because it tends to burn the paint off. You might in extreme cases put enough heat into it to case harden a very small part of it.
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This.
Quote:
https://youtu.be/KFdFsfSAuyc
This is a fantastic trick, I have used it a bunch of times. On mufflers, a friend bet me $20 I could not get his 20 year old rusted exhaust bolts off. With this trick they came right off. It’s seriously like magic.
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That's the wackiest shit I ever did see. I've got to change TREs on my 200k mile GMC this afternoon, I'm going to give that a try.
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