I think what you mentioned before is a very real possibility. You may have cracked the timeserts.
When I had my head repaired, I used an all brass plug insert installed. They had to remove the heads to do so, but it was more or less a hefty timesert.
Prior to that, my spark plug would blow out and smack into the fender. While it was pretty neat, it was not good for anything lol.
When I had my head repaired, I used an all brass plug insert installed. They had to remove the heads to do so, but it was more or less a hefty timesert.
Prior to that, my spark plug would blow out and smack into the fender. While it was pretty neat, it was not good for anything lol.