Hello I am about to replace the engine in my car, which requires me to shorten the engines sump I have chopped off the required amount and would like to know if anyone knows of a good safe method of throughly cleaning the alloy prior to it being TIG welded up I know a few others that have cut and shut alloy sumps and when they have had them TIG'd back up the cast has sweated out crud making the repairs a bit sketchy and some have found they have minor leaks..(not ideal)
Some have had to use JB weld or similar epoxy's internally to try and fix the leaks, but I would rather spend a little more time doing prep work to give the TIG welder chap the best possible chance of making it seal first time, and make his life as easy as possible
I did wonder about heating the cast alloy around the areas to be welded to see if it would pre-sweat out the crud, but someone mentioned that there /may/ be an obtainable acid dip suitable?
Thanks in advance
Regards Rob