hey guys..im pretty sure i got a blown head gasket..i drained the oil and theres bubbles in it and after it all drained, ill shake the pan (cause its unbolted due to me trying to get it off) but some liquid is still coming out a little when i shake it and its not thick at all...also it over heated pretty bad a few times..thats what started all these issues for me..but my question is whats really involved in taking the heads off and putting them back on..it is easy? i know u gotta take care of valve lash, not sure exactly what to do for that..but is there anything else i should know..ive never done this before..