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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/identify-failing-harmonic-balancer-7451388...

The harmonic balancer has three parts. The inner part is made of molded steel with a hub that bolts onto the crankshaft. The harmonic balancer has three threaded 3/8-inch holes that are used to pull the balancer off the crankshaft. A rubber insulator separates the third part from the hub. The last part, the fan belt, ...

itstillruns.com/troubleshoot-harmonic-balancer-5709802.html

The harmonic balancer in your vehicle is a pulley that sits on the end of your crankshaft. It is typically on the driver's side of the engine. The pulley drives your timing belt in most cases, and absorbs the resonance created by your engine's combustion cycle. Over time, your balancer will fail. Troubleshoot ...

www.youtube.com/watch?v=hKvebsvrA8A

Some of most frequently asked questions we get on our engines are ... which harmonic balancer do I need for my crate engine? And how do I install the harmonic balancer? Lucky for us, our friend ...

www.justanswer.com/buick/4w0yc-buick-nic-thanks-help-tell.html

nic thanks for your help. can you tell me how i can check harmonic balancer to decide if it is ok or bad. you told me in my answer that they my wobble if bad.i need to know befor purchase ($190. 47). also nic is balancer and vibration damper two different parts or one unit. hard to see parts appears behind/under belt pulley..

spendonauto.com/harmonic-balancer-replacement-cost

A harmonic balancer is a rather expensive part compared to most, so it’s in the best interest of a car user to keep it well-maintained. The replacement operation is a bit complicated but will need to be done if the balancer becomes damaged.

answers.yahoo.com/question/index?qid=20070809212319AAtm2Fi

1. A harmonic balancer does not stop engine vibrations from reaching the rest of the car. 2. The only way to tell if one has slipped is to check for TDC or top dead center and its relationship to the timing mark on the balancer.

www.ford-trucks.com/forums/641591-how-to-test-a-harmonic...

Performance & General Engine Building - How to test a harmonic balancer? - Is there a way test these at home or do I need to take it to a machine shop? (1968 390) Thanks. spots