Did you install the heads yourself or have them done and are you sure that they were torqued to spec? Were the bolts properly LIGHTLY oiled for installation or installed dry? Lastly-what type torque wrench did you use, and if it is not yours where did you obtain it?
I can't remember for sure if I lubed them or not. I didn't use sealer because of the blind holes. I thought about the consequences of dry threads today, but couldn't decide if it would make much difference. If they were installed dry, something made them slippery now since I was able to get a little more torque on them.
I used my Craftsman clicker torque wrench. I always set it to zero when storing like I was taught in the USAF. I had the cal lab at work calibrate it several years ago.
