What causes harmonic balancer to break?
What causes harmonic balancer to break? Over time, the crankshaft harmonic balancer can go bad from constant exposure to chemicals, the elements, or from old age. If this happens, the crankshaft may develop cracks and ultimately fail. What happens when a harmonic balancer is broken? The belt in the pulley might slip which will cause the vehicle to misfire or backfire. The ignition timing in the vehicle will be off. The vehicle might not start at all if the balancer is broken. As soon as you get these symptoms, you need to call a mechanic or else replace the balancer...