Skip the auto shop - Our mechanics make house calls

How Long Does a Crankshaft Harmonic Balancer Last?

harmonic balancer

The crankshaft harmonic balancer is also known as the crank pulley damper. It is connected to the crankshaft on the engine and reduces vibrations that originate from your engine. In addition, it serves as a pulley for the drive belts. Without the crankshaft harmonic balancer, your vehicle would not run smoothly and it would have constant problems, including not starting. There are two elements of the crankshaft harmonic balancer. They include an energy and a mass dissipating element. Together, these work to balance out and get rid of the vibrations from the engine.

Each time the cylinders in the engine fire, torque is applied to the crankshaft. At certain speeds, the torque is in sync with the cylinders, which creates resonance. This resonance causes too much stress for the crankshaft. If this stress continues, the crankshaft will break and your vehicle will be inoperable. To balance the vibrations and resonance, the mass element resists the acceleration of the vibrations and the energy element absorbs them.

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. As soon as you notice any of the symptoms that your crankshaft harmonic balancer is going bad, it is important to have a professional mechanic replace the damaged crankshaft harmonic balancer right away. Ignoring this problem will only make it worse and cause extensive repairs.

Since this part can wear over time, it is important that you recognize the symptoms so you can have your crankshaft harmonic balancer replaced before problems escalate.

Signs that your crankshaft harmonic balancer needs to be replaced include:

  • The engine is loud and you feel vibrations coming from your engine
  • The pulley belt may slip causing your vehicle to backfire or misfire
  • The vehicle’s ignition timing will be off
  • The vehicle will not start at all

It is important to have your balancer replaced as soon as you notice a problem, otherwise other parts of your car can become damaged and your vehicle will be inoperable.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...


Related questions

Q: The car through a serpentine belt

If the coolant leak still exists, the recommended service would be a leak diagnostic(https://www.yourmechanic.com/services/coolant-is-leaking-inspection). It is possible that a seized water pump bearing can throw the belt but all other causes, including bearing roughness in additional pulleys, have to be...

Q: Hello, I have a 2012 jeep compass with engine noise. I inspected it, and it looks to be coming from a pulley. The Crankshaft pulle

There should be no appreciable run-out on the crank pulley and if a physical inspection of the harmonic balancer reveals damage such as a broken, cracked or separated rubber bond, the balancer should be replaced. If you do have a...

Q: Noise coming from air conditioner

Hi. From my experience with this car, this is typically caused by a failing AC compressor. The compressor on this vehicle is a common failure and it typically starts to make a loud squeaking or rattling noise. If the noise...