Actually, I was just thinking about replacing the nuts , not the bolts. Although , one of the rods is now missing a bolt. I think the threads didn't look good when I took the piston & rod out a few years back so I took the bolt out. I have a couple of extra bolts & nuts, so I can replace it. I suppose it would be impossible to get an accurate torque reading if nylon-insert locking nuts were used? I've had other engines with castle nuts & cotter pins and one or two with the PAL nuts. I guess if these 235s and 261s didn't need them when new they don't need them now.
