I removed the head to engine block bolts from my truck and found a extrange one. It has a drill of about 1/32" from the bottom to just 1/8" over the tread. It looks like used for some kind of lubrication or maybe just a not original bolt installed on a previous repair for some reason.
At the same time, this bolt has been manually grinded to flatten it partially along up to 1/8" over the thread.
I have no idea what to do with it. Should I replace it for a solid one?, Was it designed that way?. What for?. I will apprecite your advice.
Thanks in advance bolters!
