Hi,
Are the pics you attached all from the same cylinder? I do see marks in picture number two, but pics 1 and 3 don't appear to have the same marks. Also, if there was interference between the valves and pistons, you would know. The pistons would have a clean mark where they touched.
The idea that you may have a bent valve really isn't shown in these pics. Remember, since you have 30 psi compression, which indicates there isn't a bent/stuck open valve. Based on that information, I would suspect something is preventing one of the valves from fully closing.
Let me know.
Joe
Tuesday, October 31st, 2023 AT 6:28 PM