My hg let go in my driveway... engine never overheated. Engine would run (lobishly) but never climbed in temp out of norm. Head was warped out of spec.
My thoughts are these heads run at such a high temp it is luck of draw once you unbolt it
I'm going thru this now.
Original head was too warped (by oe tolerance) to skim down. Shopped a bit for used heads, got lazy and bought new from dealer.
The rebuild with old head was quoted approx 3k- inclusive of a ~500 machining fee
Add new head cost 1500
If I had room and time, I'd def...