Rod polarity by friction

I tore down a old 350 Chevy engine once to get a set of Xs or O rods for a build up and when in keeping the rod caps on the correct rod, I found them magnetized after all those years of sitting! You could pick up the cap with the rods and the nuts were hard pressed to go wrong unless backwards! I removed the piston pins to find them charged none as to reversal of friction movement! Knocked out all the bolts and each were reverse charged per rod as they had to be! I placed them in the center of my shop on the concrete and rotated them in a pattern until their polarity was gone! A light pinging for good measure and they were ready to polish with no shavings clinging! If a rod is revered in a engine that has turned one way for long, it has a static charge and new tempered bolts are polarized when installed! A reversal of this energy after cranking can drop the molecular static energy of these tempered bolts as they have to reverse and pass 0 to get back there directional charge given by friction! Break in or into once is to many! a short pre-run to provide heat, cool, heat, cool  allows for a polarity flip flop! Evening out your misgivings of used rods when they have no markings is a good thing for any metal that moves! A bit more than just the right torque to make one stay together! Very loud music can do the pinging if on a grounded plate as to vibes neutralizing polarity by changing it to sound energy as a speaker does! A pair of round washer shaped magnets that are marked for direction and placed correctly as a pair can do the job quickly! As all the rods are the same but half are reversed beware of reversal by machine shops or polarity when using used rods!