I might have missed a rod bolt/nut torque one time. In a 460 boat engine. All I know, it threw a rod on breakin. Do not know why....Only failure I ever had.....Of course in a boat!! PITA to take back out......
You could have left the nut loose, or not got the bolt all the way bottomed in the rod and it walked under load which made the cap loose when the top of the bolt seated....
Sometimes it's hard to tell...
That's why I tighten them when I install them and usually go back and retorque immediately....
Then before I put the oil pan on, I check all of the rod and mains again and put a paint mark on each one to indicate that I have done my verification torque before I button it up...
Measure twice... Or three or four or five times so you don't throw a rod or crank... Usually three or four times is good enough for me to be confident I got them all correct and nothing's loose...
