Today when I picked up my Mopar 340 connecting rods after having the rod bolts replaced and big end reconditioned at a Mexican diesel machine shop, I was told six of the eight rods required demagnetizing. I was not aware of this procedure prior to today.
It's interesting that they mentioned demagnetizing the rods. It’s actually a common procedure, especially after machining processes like reconditioning or replacing bolts. During those operations, metal parts can become magnetized, which could potentially interfere with certain measurements or cause issues with the engine’s performance down the line. Demagnetizing ensures that the rods are free from any unwanted magnetic fields that could affect things like bearing clearances or even fuel injection systems in some cases. Definitely a good thing to do, even if it’s not always talked about.