a replacement egr valve will cost less than youll spend on the
welding alone, much less the labor to remove the egr cooler.
egr's can now be bought on ebay for less that 75 bucks EASILY,
it wont be long and theyll be handled by autozone and the likes...
(they may already be in the stores)....the dealer retail on the valve
is around 130 bucks...still less than a good welding job would cost you.
heres one for 46 bucks...
EBAY NEW IN BOX 6.0L EGR
and BTW if youre gonna weld the egr cooler shut, youll need a set of
THESE