Wow! It would dissolve it in10 minutes for me. You must have some mutant carbon.
I must, I spent more time on it and made more progress, but some of it is still thick & hard as a rock. It makes me think this is 40 year old carbon.
If the head bolts/studs were ever over torqued and stretched in the past, they should be replaced out of hand. Once they get stretched, they won't hold a torque, they just stretch more.
If the head is warped, then I think the bolts would have overheated too and they'd definitely need replaced.
Edited by kiddpitt, October 25, 2013 - 06:07 AM.