Im pretty sure my friend is your engine builder (Dale)here in Washington.He told me the washer and the bolt were dead soft when he rockwell tested them. He is replacing both washer and bolt as far as i remember He is one picky guy and doesnt over look anything as im sure you know. The guy is a walking book of info and has forgot more about engines than i will ever know..When ever i need to know exactly what to do he is the guy i ask and if he doesnt know he will dig out the info from one of his books He has the total respect of all of us Buick guys that know anything here in Washington...If i was going to have a motor built he would be my first choice no matter were i lived. Im having him oring my heads because i know he will do a perfect job. He has a program to do it on a CNC machine and not one of those hand operated tools. The tolorance on oring groves are +/- .001 depth and i know he can hit it..Originally posted by TurboTR
Yeah in fact my engine guy made a custom, extra thick, tool steel washer for this. You would think that a soft washer there and loss of clamp torque could be a real problem. Maybe a factor in some of the reported key breakage?
TurboTR