blown valve

a friend of mine has a 99 s10 with a 2.2. i was thinking of buying it from him but it has a blown valve and the mechanic said that he needs a new engine. i was wondering if that is true that he needs a new engine, cuz i thought you could fix the engine if it is a blown valve.

just make sure that nothing else happened to the piston or head, then change the valves

sorry for the late reply but thanx

what if something did happen to the piston....would it be just that piston that is bad....or would i have to rebuild the engine?

thanx ahead of time

if you are going to tear the engine down that far for one piston all of them should be done

ok thanx