Buy a new one. Years ago they lasted the life of the vehicle, and problems were unheard of. Today every auto parts store has huge books that show nothing but replacement harmonic balancers, (vibration dampers).
Two things can happen. The least common is the center hub cracks, usually to include the center bolt is loose. The seal should be replaced too as sharp edges of metal have been spinning around inside it. In every one of these I have seen, the crankshaft snout was hardened, so while the vibration damper's hub may have worn away, the crankshaft was not damaged. An additional clue is this failure includes a loud knocking noise from the serpentine belt pulley the belt pulls up twice per revolution.
The more common failure is the outer ring is glued to the center hub, and that glue can let go. This happens most often when the pulley is cast as part of that ring. Many engines use a separate stamped steel pulley that is bolted to the hub of the balancer. If that pulley is not wobbling, it is just the steel ring that has broken loose.
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Friday, June 23rd, 2017 AT 4:34 PM
