Help! Got to the point of adding the pal nuts onto the con rods in my Jeep engine rebuild (actually a post-war French bitsa with Hotchkiss block, Ford con rods etc.). The manual says to get them until they "seal", then turn a further full turn. My pal nuts are thin pressed steel affairs and I took seal to mean making contact with the main nut. I assumed they went flat side onto the main nut, but when I attempted to then give them a further turn, the pal nut just bent out of shape. What am I doing wrong and how tight should they be?