Tks Ken, everything is helpful. Back to last email talking about the excessive force required (in my opinion) to loosen the head bolts is there a danger stripping or breaking the bolt or wrench? Did you losing yours with a bar or impact wrench. Looking in the manual for my old Diesel, the final setting for hex bolts are 74 ft/lbs--for 12pt 30/50/-90deg,90deg--what I assume to be equal 74ft/lbs and conforms to the new Diesel. Certainly not excessive. Your opinion--Hein