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www.yourmechanic.com/article/symptoms-of-a-bad-or-failing...

The crankshaft harmonic balancer is a device connected to the front of an engine’s crankshaft, usually built into the crankshaft pulley. Its purpose is to absorb and reduce harmonic vibrations from the engine as the crankshaft rotates, as harmonic vibrations at high engine speeds can cause accelerated wear and damage to the components.

itstillruns.com/signs-bad-harmonic-balancer-7247989.html

The harmonic balancer is the unsung hero of your vehicle's engine. This component works with the camshaft sensor to keep engine components operating smoothly and belts running without slipping. The signs and symptoms of this component failing can be quite noisy. Without proper attention the problem can quickly ...

www.autoblog.com/2016/01/08/symptoms-of-a-bad-or-failing...

The crankshaft harmonic balancer is a device connected to the front of an engine’s crankshaft, usually built into the crankshaft pulley. Its purpose is to absorb and reduce harmonic vibrations ...

www.reference.com/vehicles/symptoms-bad-harmonic-balancer...

A knocking noise from the engine is the main symptom of a bad harmonic balancer. A squeaking noise is another symptom of a bad balancer. When dealing with a bad harmonic balancer, getting it fixed as soon as possible is vital for car owners, since it can cause the engine catastrophic damage.

www.youtube.com/watch?v=58lvoAbB0Ko

This Sounds Like A Bad Idea... V6 3800 Harmonic balancer bolt removal. ... Symptoms and Fixes Included ... Harmonic balancer Removal- Chevy Impala, Ford Focus, and many other models & years. ...

nastyz28.com/threads/symptoms-of-a-bad-harmonic-balancer.211140

Pulled over and noticed the alternator belt upside down, fixed it and tough to restart motor, but if you keep the rpms up it would stay running. Pulled valve covers all looks good there. What are the symptoms of a bad harmonic balancer, it is original 1979? Thanks!

www.quora.com/What-are-some-typicial-symptoms-of-a-bad...

The most easily identifiable sympton is engine vibration, specially at idle which is when the balancer works the hardest. Check your engine for missfires (that could also cause engine vibration) and if there a none, then you are more than likely looking at a bad balancer.

www.youtube.com/watch?v=3Ridr6wp0N4

This is what sounds like when your harmonic balancer goes out.

www.underhoodservice.com/harmonic-dampeners-fail-look

A harmonic balancer is like a punching bag for the crankshaft. There are two basic components in a harmonic balancer: inertial mass and an energy-dissipating element. The inertial mass consists of an outer ring that could have the grooves for the belts and an inner hub that connects to the crankshaft.

mechanicbase.com/engine/crankshaft-harmonic-balancer-symptoms

The harmonic balancer is made up of top quality rubber and metal. The combination ensures the energy is properly absorbed and the balancer stays young for a long time. Crankshaft Harmonic Balancer Symptoms. As the crankshaft harmonizer fails, a number of troubling signs arise that are usually easy to spot.