[juanbenae]

those bury a little less than an inch on a thin flange car, could not imagine other motors have changed much. so it sounds like you may have a half inch of thread "engaging". if its one you can see, and get to easy enough i would locktight it and see how it goes. if it comes out, regroup &redrill.

on the other hand it could be the stud is just bottoming out and tightening. i guess i am no help eh?