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

["Chris Williams" <cwilliams1966@xxxxxxxxxxxxx>]

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,,
Chris
--- In dmcnews@xxxxxxxxxxxxxxx, "Bruce Benson" <delornut@...> wrote:
>
> We have a local owner going through the same situation. The problem 
with 
> using epoxy for the repair is the different expansion rates between 
the 
> epoxy and the aluminum. There is also the real possibility of the 
epoxy, 
> prior to curing, dripping into the oil gallery and plugging it. 
When 
> disussing the problem with the local owner I suggested fabricating 
an 
> 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 
newly 
> 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 
the 
> 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 
engine 
> block.
> 
> Bruce Benson




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