As far as the driver's side, it is all based on how the timing was set. If it was incorrect, the opposite side may have not been in the position to be hit. That is what I believe happened.
As far as not turning it over very long, that usually doesn't matter. If it was hitting hard enough to break the rocker arms, it was hitting extremely hard.
When I work on timing any engine, once I have the marks set and put back together, I always turn the crankshaft by hand at least four or five rotations gently to see if it stops turning at any point. It's just a way to make sure there isn't going to be interference.
Let me know what you find and what I can do to help.
Monday, November 7th, 2022 AT 9:05 PM