On Thu, 13 Jun 2019 08:42:46 +0100, Chris Green wrote:

Thanks Tim, that's really useful. I have a little crack at the edge
of a transmission case and I've been wondering if something like this
would be worth trying. The crack doesn't *really* need fixing, it's
only in the lip/edge so I'm pretty sure it will hold together and be
oil tight anyway. I'd just be happier with the crack fixed.

Alternative is to TIG-weld it, i.e. go to someplace where they do it and let
them do it. Easy for those practiced in the art, and those that have the
expensive equipment (needs AC, and I think Argon, and plenty of current).
Possibly done for a bit on the side.

I'd worry that torch welding would cause the whole edge to sag. The rods I used
didn't take kindly to crud and oxides, and I spent a lot of time and gas on
scraping and scratching at the ally to no avail. Don't see how you could get the
inside of the crack clean, to give the flux a chance.

Or maybe "Loctite Fixmaster Aluminum Putty" or one of its brothers?


Thomas Prufer