i have been told that is a common problem on the 4.3 engines. i have 88 s10. i thought it was a head gasket, but have not fixed yet. i used liquid glass as a temporary fix.
it seems to fix for about 2 years and i do it again. I was
told other day someone said i would guarantee you its an intake manifold gasket
instead of a whole head. is the 4.3 bad at having that as a problem? any
experience with that? i would rather spend 15 dollars on intake manifold than
the whole head gasket set. I know i didn't do the liquid glass right but still
helps. it said I'm supposed to flush radiator and run it hot with water first. i
just poured the liquid glass into radiator with thermostat open. will that hurt
anything? seems to have fixed problem for now.