I have always had a low end miss hesitation lately I would say probably for a good bit of this yr and even after a complete few months of diagnosing, up to date maintenance and checks, trying other parts, ect. I do seem to have some coolant overtime, not anything fast, but have some coolant loss and can smell just a slight coolant, not very strong at all but I think its slight. I think its possible I have a slight intake or head gasket leak or maybe even a slight freeze plug leak and probably one in back of head that cant be seen ( I just had one on my pickup in same spot that was leaking and I couldnt see the leak). I'm wondering if it's worth trying a can of K&W block seal in it to keep fix it temporarily as I have heard of people doing it and it lasting a few yrs or more. The main thing i want to know from you guys is the negative effects of using block seal as i think I have heard in the past about it clogging your radiator potentially or something and just want to know if there are any potential risks to using it. I don't want to worry about this little problem if potentially it will mean needing to spend more money as a result of it possibly messing up something else like a radiator or something. Also there is no coolant mixing with oil or anything. If there is a slight head gasket or intake gasket, that will cause a slight hesitation/miss possibly? So thoughts guys??????????