I had a bolt break off in my aluminum engine block. I've been able to get
the broken piece out of the block, but the threads were damaged. Now I need
to repair this...
The original bolt was an M8x1.25x100mm of #8 hardness. If I put a new bolt
into the hole, it does grab but is VERY loose and not suitable to hold it's
braket in place.
I was hoping to find an M9x1.25x100mm bolt, but no luck. I then tried to
locate an 11/32"x4" bolt and again, no luck.
So now I figure I can drill this hole out a bit and cut threads for a
Does this sound reasonable?
My biggest issue is clearance. I had to use a 90' drill to get the broken
bolt out. There is almost no visibility to see if the hole is straight. The
bracket that mounts here does not have any critical tolerances.