[DML] Re: re-Opinions, & Assistance Greatly Appreciated!
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[DML] Re: re-Opinions, & Assistance Greatly Appreciated!

Although not quiet the same, my first attempt at repair was to have 
two ally 10mm thick plates TIG welded over the top deeper holes. This 
worked for a few months, unfortunatly the oil just found the next 
weakest spot in the casting to force it's way out of,,
--- In dmcnews@xxxxxxxxxxxxxxx, "Bruce Benson" <delornut@...> wrote:
> We have a local owner going through the same situation. The problem 
> using epoxy for the repair is the different expansion rates between 
> epoxy and the aluminum. There is also the real possibility of the 
> prior to curing, dripping into the oil gallery and plugging it. 
> disussing the problem with the local owner I suggested fabricating 
> aluminum block the exact size as the leaking cavity between the 
spars. The 
> new piece of aluminum would reach the top of the spars where it 
could be 
> heli-arc'd  solid to the surrounding spars. It would, in other 
words, be a 
> big plug. The molten aluminum created during the welding would be 
at the top 
> of the cavity where it couldn't flow into the oil gallery and the 
> fabricated piece would fill the cavity so as not to allow an 
unwanted oil 
> reservoir. The welding would seal the cavity all around the top of 
> spars. I haven't seen this done but I can't imagine why it wouldn't 
work and 
> it would sure be a lot less work and expense than changing out the 
> block.
> Bruce Benson

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