I am trying to flush the rust out of my 1954 235 but when I opened the petcock on the side of the block nothing comes out. So could someone tell me if the water jacket turns left and right just inside the block? I tried sticking a piece of wire inside it but it only goes inside about 3/4 to 1 inch in before hitting something hard. I tried a small needle file also but didn’t get any water out.
