At a given torque, the lubricant used directly influences the preload on the bolt. Did you install as per their recommendations, or did you do use loctite and 85 lb-ft? If you did the loctite, you put the wrong preload on the bolt. It is usually best not to question the recommendations of a manufacturer...they generally know what they are doing.
Email me a picture of the bolt fracture face, I can probably tell you how the bolts failed...I'm guessing overload.
edit: yep, just as I thought.
Email me a picture of the bolt fracture face, I can probably tell you how the bolts failed...I'm guessing overload.
edit: yep, just as I thought.