Q: crankshaft pulley harmonic dampener fell off after serpentine belt replacement

asked by on

A couple of weeks after replacing a broken Alt/AC Belt, the outer toothed-ring on the CS pulley fell off while starting and/or driving car. Does this typically happen with new belt?? Does anything hold the ring in place other than the rubber ring on the pulley, or can the ring be reused?? Do I need a gear-puller to remove the pulley, and is this a very difficult job?

My car has 115000 miles.
My car has an automatic transmission.

It could be that the condition of the pulley caused your belt failure in the first place. Deciding that depends on where the balancer separated.The balancer itself consists of a center hub with a pulley ring around it and a bonded rubber ring between the two. Depending on the model of car, additional pulleys may be bolted to the outer ring to accommodate more belts If the balancer separated at the rubber ring which is simply held in by adhesive, the whole thing must be replaced, and may actually have been the cause of your belt failure to begin with. If the pulley separated where it bolts together, I could not help but wonder if the pulley was disassembled and the bolts not properly tightened. Careful inspection of the parts should tell the story. If you try to replace the balancer, you may be able to do it without a gear puller, but removing the bolt in the end of the crankshaft is the big challenge. It is very large and very tight and keeping the engine from turning while you try to loosen the bolt can frustrate the most capable mechanics who don’t have the special tools made for that job. Likewise, if the bolt is not properly torqued when assembled, it could lead to bigger problems than you have now. By contacting Your Mechanic you can have a technician come to your home and take care of this difficult job for you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. crankshaft pulley harmonic dampener fell off after serpentine belt replacement

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Serpentine belt keeps shredding.

The belt will get cut or shredded by pulley alignment or seized pulley bearings. The alignment of the pulleys should be checked. The tensioner pulley is the most common one to be out of alignment or the bearing to seize...

Q: Q: Hear grinding when braking

Hi there. This is a common issue to have when your brakes need replacing. A grinding noise is most typically an indication that your brake pads are worn past their limit. Have a mechanic sent by YourMechanic come to your...

Q: My steering wheel keeps shaking uncorollably randomly

What you are describing sounds like a problem with the rack and pinion gears. The rack and pinion gear set does two things: It converts the rotational motion of the steering wheel into the linear motion needed to turn the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.