Alum for broken stud removal
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- Walrus
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Alum for broken stud removal
Just seen this video on YouTube: https://www.youtube.com/watch?v=fqZYgReuywM, using Alum to remove a broken stud. Would this be safe to do on a VW T25 engine? It may not be quick but it *looks* easy...
1991 2.1 LPG Syncro (aka Beaker) ...and... 1998 1.9TD T4 (aka Daisy)
- Oldiebut goodie
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Re: Alum for broken stud removal
No reason why not provided you can devise a suitable containment for the solution around the offending steel stud/bolt. Saves wrecking the threads in a valuable case. I am surprised that it isn't used more rather than the heat/welding etc techniques.
1.6D 2019 VW T-Cross
200hp VW T6
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5̶0̶8̶d̶ ̶M̶e̶r̶c̶
200hp VW T6
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- itchyfeet
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Re: Alum for broken stud removal
Thanks, will be trying this
Where would you buy Alum?
Where would you buy Alum?
- Walrus
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Re: Alum for broken stud removal
Health food shops apparently! or Amazon/fleabay sell it for ~£5 for half a kilo.
1991 2.1 LPG Syncro (aka Beaker) ...and... 1998 1.9TD T4 (aka Daisy)
- itchyfeet
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Re: Alum for broken stud removal
maybe Asian shops too, Fatakdi powder
Re: Alum for broken stud removal
Interesting and funny - keep yer dick in a vice
1992 red lle 2.2 subaru 1990 rhd caravelle 2.2 subaru 1986 california import vanagon
- itchyfeet
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Re: Alum for broken stud removal
same stuff?
Aluminium Sulphate 17% Iron free Al2O3 in sulphate form.
http://www.ebay.co.uk/itm/500g-of-ALUMI ... 1123026367" onclick="window.open(this.href);return false;
Aluminium Sulphate 17% Iron free Al2O3 in sulphate form.
http://www.ebay.co.uk/itm/500g-of-ALUMI ... 1123026367" onclick="window.open(this.href);return false;
- Oldiebut goodie
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Re: Alum for broken stud removal
I think that it is the potassium alum that is generally used. KAl(SO4)2.12H2O may be wrong though.
But then I have read of the ammonium alum having the same effect so it may not matter too much, speed of reaction different?
But then I have read of the ammonium alum having the same effect so it may not matter too much, speed of reaction different?
1.6D 2019 VW T-Cross
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶
- itchyfeet
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Re: Alum for broken stud removal
Looking at Alum page on wikipedia I think its
Aluminium potassium Sulphate
Or Potassium alum
or Fatakdi powder
Aluminium potassium Sulphate
Or Potassium alum
or Fatakdi powder
Re: Alum for broken stud removal
Well I like the idea as it would appear to be a bit cheaper than Spark erosion and in some cases do able in situ.
I am surprised that I never came across it as a Salvage Scheme (Posh Bodge) when I worked in Aerospace.
CS
I am surprised that I never came across it as a Salvage Scheme (Posh Bodge) when I worked in Aerospace.
CS
Well-timed silence hath more eloquence than speech.
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
- Oldiebut goodie
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Re: Alum for broken stud removal
I can recollect seeing it mentioned on a Yank forum a long time ago but never gave it much thought. An ideal solution as a solution to those broken head studs that you petrol guys have trouble with. If it saves damaging an expensive crankcase well worth persevering with to get the remains out however long it takes. It seems to be effective with a supersaturated solution.
1.6D 2019 VW T-Cross
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶
Re: Alum for broken stud removal
As if we petrol heads would use anything else
CS
CS
Well-timed silence hath more eloquence than speech.
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX