Back on the road

[mpeters6@rochester.rr.com (Marc Peterson)]

Finished putting the rear driver's side wheel bearings/stub axle/drum back
together.  I had to drill out one of the busted off bolts, and I am
concerned that it might have weakened that bolt hole.  I really worked it,
lots of heat, lots of drilling.  I even had the busted off bolt glowing Red
Hot when I cut it off flush so I could drill it.

Is there a chance that I weakened the threads in the hole by doing this.  Is
this dangerous?  Should I take it apart and tap it out to the next larger
size?

Marc