From what the local guys here tell me, it just happens sometimes even though you have them do all the right checks.
Although I’ve never heard of our forum hero’s having a problem.
It happens to everybody. I have had a couple of them after they are running develop a crack, had to replace a couple of blocks. We are working with 60 year old engines. To put that into context - when I was in college it would have been like somebody building engines from the 1920s. Nobody "likes" it to happen, but an old, worn engine that will happily putter along in an old truck or Galaxie at light loads will sometimes react differently when we ask it to make 500 HP.
