Originally Posted by waldig
Hollow inside???????? That has to be a casting bubble and defect. No way do bolts have voids in that size. This is bizzaarr!
Woody
They really are hollow. The same thing happened to me when I installed my Code3 pulley and over torqued the bolt.
I bet that's why they are hollow. Torque beyond spec and it breaks. Came out real easy and took the two pieces to a local harware store. Found a bolt the same length and threading. Fixed it for about $2.