Main bolt threads pulled out of block
I was building 2.3L i4 today and when I went to torque the main bolts the bolts did not hold any torque on four of the bolts. I put the bearing in place and put the lower structure in place and very carefully used 3/8 air wrench to snug it in place. I then taped on it to make sure all bearings were in place. I set my torque wrench to 63 ft lbs and the first bolt just spun, no resistance. OH SHUCKS I exclaimed! I pulled it out and the threads that should have been in block were now on bolt!! I removed all the other bolts and four were good and three came with the threads. What do I do now, what did I do wrong? The guy at the machine shop insisted I over torqued the bolts but I know I didn't not even close!
2007 Plain Jane 175000 mi lost rod bearing