Cren,
I think it was an anomoly. When the bolt bottomed on the end of the threads in the hole, and the head had not bottomed, it torqued on the stem of the bolt, and not on the base of the head, as it should. The stem subsequently twisted...until she broke, her. I was quite fortunate that a stub protruded, and it came loose with a good whack from the impact screw driver.
I think the issue is the depth of threads, and length of bolt, more than the actual torque pressure.
I would be happier if I could learn the grade of the originally installed bearing cap bolts, but that kind of info seems most elusive. I can't find bolt grade, and I can't find torque specs.
