EXTERNAL BALANCING ACT
When balancing a crankshaft that has a flexplate or flywheel, make sure it fits snugly and there is no lateral movement. Any play can cause the balance not to repeat when the flex/flywheel has been removed and installed. I like to center them up as best I can, and then stake the perimeter so there is no play when it’s removed. I’ve seen the balance change 20+ grams on sloppy parts, if allowed to shift. Flywheels are the worst because of their greater mass. Same applies with pressure plates. Always use shouldered bolts that positivity locates it and stamp if for installation position.

Ron Flood
Cedar Machine
North Branch, MN
FEB, 2023