1996 Chevy S-10 collaped valve lifters

did you lose oil pressure? first thing is loss of oil pressure but if thats was ok then replace the lifters, i just had one yesterday that was a 2000 blazer with a intake manifold leak (coolant internally) and the lifters were collapsed on most of them and it was clattering so i installed new lifters when i replaced the intake gasket and that took care of the problem, i dont know if the intake gasket had anything to do with it but thats the second time i have had to replace lifters in a gm engine for making noise and in both cases thats all it was. hope this helps. they have made a new updated intake manifold gasket for this engine to do away with the plastic factory ones, felpro has a set make of metal and hard rubber, i strongly suggest using them.