An engine harmonic balancer, also known as a crankshaft damper or vibration damper, is a device attached to the crankshaft of an engine to reduce vibration and stress on the engine components. The balancer consists of two parts, an outer ring and a hub, which are separated by a rubber or elastomeric material. The outer ring is attached to the engine's accessory drive, such as the alternator or power steering pump, while the hub is bolted to the crankshaft.
As the engine runs, the harmonic balancer produces vibrations that can cause the crankshaft to flex and twist, leading to wear on engine bearings, crankshaft journals, and other components. The harmonic balancer absorbs these vibrations by oscillating in response to them, which reduces the stress and strain on the engine components. In addition to reducing vibration, the harmonic balancer also helps to dampen torsional vibrations, which are caused by the twisting of the crankshaft due to the force of the pistons. The rubber or elastomeric material in the balancer absorbs these torsional vibrations, which can cause damage to the engine over time if not properly addressed.
Harmonic balancer failure can be a serious issue that can cause significant damage to the engine if left unaddressed. As described earlier, it can cause engine misalignment, excessive vibrations, engine damage, and belt slippage, which can lead to decreased performance or failure. It is essential to monitor the engine's performance and address any issues promptly to prevent further damage. Then what happens when a harmonic balancer fails?