[DeTomaso] Galled stainless fasteners

[Tomas Gunnarsson]

I think galled SS threads are different from rusted iron/steel threads.
The heat from the welding won't be of as much use as the internal and
external threads have turned "solid" in a different way from when rust
builds up in a thread. At work we build our products out of SS to a
large extent. The screws are plated with e.g. silver to counteract
seizing. Another option is to install bronze helicoil inserts. The easy
way is of course to stay away from threaded components made from SS
completely... :-)
 
Tomas

<-----Ursprungligt Meddelande----->
From: Thomas Tornblom [Thomas.Tornblom at hax.se]
Sent: 26/5/2010 8:20:27 AM
To: detomaso at realbig.com
Subject: Re: [DeTomaso] Galled stainless fasteners

Perhaps you can try the trick Tomas Gunnarsson and I used for getting 
the stuck drain plugs out of my block?

We placed a suitably sized hex nut over the plug and welded it to the 
plug with a MIG-welder through the threaded hole. That serves two 
purposes, get something to wrench on, and heat the plug/bolt so that it 
will be easier to get it loose.

Thomas


2010-05-26 08:08, Dave Londry skrev:
> I'm to cowardly to use screw extractors Michael.
> If you break one of them off - it's all over.
>
> I really like the slot idea if you have something broken off flush.
> I still have a head to work with (for the moment), but I may get the
> flush case at the next break.
> dave
>
>
>
> michael at michaelshortt.com wrote:
>>
>> Try cutting a slot with a dremel tool and twisting it out like a
screw
>> head, worked for me once michael shortt did you try drilling it with
>> an actual extractor bit tool
>>
>>> On May 25, 2010 11:00 PM, "Dave Londry"<davel at emspace.com
>>> <mailto:davel at emspace.com>> wrote:
>>>
>>> Has anybody got particular experience with galled stainless?
>>>
>>> I got #6143 with a fancy Gilmer drive with black stainless pulleys,
an
>>> aluminum waterpump
>>> and black-stainless bracketing for the alternator and A/C.
>>> I just went to whip the front cover off to get my wiped camshaft out
and
>>> found the morons used
>>> stainless fasteners (304 I imagine) and no anti-seize.
>>> I have all but 2 of the necessary ones our now, but one of the
remaining
>>> ones was the first one I touched.
>>> Of course it's a hex-drive and I stripped it. I've had a torch on
them
>>> and been dosing them with liquid wrench,
>>> but no luck. I don't see that penetrants are much use for galling
>>> anyway.
>>> The round head is 9/16" and I can't find a stud extractor that big
so
>>> all I can think of is a 9/16 bolt extractor.
>>> (fits over the head and has teeth) and an impact wrench..
>>> I imagine I'll eventually tear the head off and then I can use my
stud
>>> extractor on the stub until I twist it off, etc. etc.
>>>
>>> Any ideas welcome.
>>> thanks in advance
>>> dave
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Real life: Thomas Törnblom Email: Thomas.Tornblom at Hax.SE
Snail mail: Banvallsvägen 14 Phone: +46 18 32 31 18
S - 754 40 Uppsala, Sweden Cellular: +46 70 261 1372

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