[j911brick]

Interesting read. I usually build several motors every year and I have noticed the quality of Glyco bearings have gone down hill, but I have not yet had motor fail due to a bearing issue. A couple years ago I noticed that bearing tolerances on some bearings were too tight. Now it seems like they are too loose. But the reason I ended up on this thread is because of some bearings for a 996 motor I'm rebuilding. These bearings (Glyco #71-3913 996.103.121.81) not only measured at twice the clearance I was expecting, they are also simply 1/8 inch too wide. No question they would have self destructed instantly since they were practically hanging out the side of the rod. They are also .0007 thinner than the (old) stock bearing which is a total of .0014 extra clearance. But under further investigation they seem to be an exact replacement for a 3.0 rod bearing, give/take a couple 10 thousandths.