Ok so we have yet another round of HG threads and polls. Who has had a HG problem, how can I avoid a HG problem, how can I predict a HG problem and how can I modify my tenp senser to help me avoid a HG problem. What the hell is the big deal? Just change the SOB out. I know, if your going to pull the head then you might as mill it, if your going to mill it you might as well grind the valves, well if the top end is tight you'll need new rings, if your putting in new rings you might as well bore it and...... Well that's BS. If you have a good running engine right now there is no need to do all that work because there is nothing pointing to any of THOSE areas as needing attention. You just have the original designed HG that is prone to failure. So $175.00 and a weekends worth of work gets the HG replaced and no more worries about failure according to PowderPig. So help me understand the big deal about changing this HG out as a PM.