Without going into a long tale, any good formula/mix to soak some cylinders in to loosen up carbon stuck rings? Head is off (218 Dodge). Helping a fella out 350 miles away, I have his valves here and they look really good, no pitting, rust etc Leads me to think they aren’t stuck by moisture, but carbon build up sitting. I’ll still reface the valves, sent him down my seat cutters and he’s working on that, but for as good as the valves look, thinking it might be rings. Oh, had him do a wet test and compression didn’t come up, what I had him pull the head, sent him stuff to get the valves out and do the seats, etc.