i just bought a used 2.5L engine out of a 91 S10 to put in my 1985 S10 because the engine started mixing water and oil together. Well anyway i bought this other engine with less then a 100,000 miles on it and i got to cleaning it up today and found the block had about a 5 to 6 crack in it. It is right under the 3 freeze out plugs on the left hand side. Well my question is can i take a stick welder or a wire feeder welder and weld it the block where it won't leak coolant out? I had a few mechanic guys tell me that i can do it and then had a few tell me it wouldn't hold and bust back loose with a bigger hole. I'm a pretty good welder and i think i can do it but i really like to know if i can do it or not before i try.