2008 high pitch squeal on moderate to hard acceleration

[Mike73]

Not my video, but the only thing i could find online that accurately has the sound im describing. I do have a slight harmonic balancer wobble and had to get my belt replaced recently. Mechanic said i should be good for some time before i need to go ahead and change the HB. Could this be related?

 

[Murray20c8]

If your harmonic balancer bearing is bad you should replace it pronto! That can be catastrophic and cause major engine damage.

 

[1st Vette]

If your harmonic balancer bearing is bad you should replace it pronto! That can be catastrophic and cause major engine damage.

A bad harmonic balancer bearing can cause significant issues with your engine. Here are some key points to help you identify and address the problem:

Symptoms of a Bad Harmonic Balancer Bearing​

1. Wobbling or Movement: A failing harmonic balancer can cause the pulley to wobble excessively, which can be visually noticeable. This wobbling can lead to further damage to other engine components
   5
   .
2. Noise: A bad harmonic balancer bearing can produce a knocking or banging noise, similar to a rod knock, which can be misdiagnosed as a rod bearing issue.
3. Vibration: Excessive vibration can be felt due to the failing harmonic balancer, which can cause premature wear on other components like main bearings, the oil pump, and the crankshaft
   5
   .
4. Timing Issues: If the timing marks on the harmonic balancer slip, it can lead to timing errors, misfires, or even engine stalling
   5
   .
5. Accessory Failure: A failing harmonic balancer can cause the serpentine belt to slip, leading to failure of accessories like the alternator, power steering pump, and AC compressor
   5
   .

Causes of Harmonic Balancer Failure​

1. Heat: Increased heat generated by torsional vibration can cause the elastomer to crack or bulge, leading to failure.
2. Exposure: Oil, solvents, and ozone can deteriorate the elastomer over time.
3. Cracking: Excessive power can crack the hub of the harmonic balancer.
4. Improper Installation: Misalignment or galling during installation can cause premature failure.
5. Excessive Belt Tension: Over-tightening the serpentine belt can cause crankshaft snout runout and harmonic balancer wobble.

Troubleshooting and Replacement​

1. Visual Inspection: Check the harmonic balancer for signs of wear, such as cracks, bulges, or separation between the hub and outer ring
   5
   .
2. Use a Pulley Puller: Always use a quality pulley puller to remove the harmonic balancer to avoid damaging the crankshaft
   5
   .
3. Upgrade to a Viscous Damper: Consider upgrading to a high-performance viscous damper like the Fluidampr for improved durability and performance.

Remember to address any issues with your harmonic balancer promptly to prevent further engine damage.

 

[Vettenut]

A bad harmonic balancer bearing can cause significant issues with your engine. Here are some key points to help you identify and address the problem:

Symptoms of a Bad Harmonic Balancer Bearing​

1. Wobbling or Movement: A failing harmonic balancer can cause the pulley to wobble excessively, which can be visually noticeable. This wobbling can lead to further damage to other engine components
   5
   .
2. Noise: A bad harmonic balancer bearing can produce a knocking or banging noise, similar to a rod knock, which can be misdiagnosed as a rod bearing issue.
3. Vibration: Excessive vibration can be felt due to the failing harmonic balancer, which can cause premature wear on other components like main bearings, the oil pump, and the crankshaft
   5
   .
4. Timing Issues: If the timing marks on the harmonic balancer slip, it can lead to timing errors, misfires, or even engine stalling
   5
   .
5. Accessory Failure: A failing harmonic balancer can cause the serpentine belt to slip, leading to failure of accessories like the alternator, power steering pump, and AC compressor
   5
   .

Causes of Harmonic Balancer Failure​

1. Heat: Increased heat generated by torsional vibration can cause the elastomer to crack or bulge, leading to failure.
2. Exposure: Oil, solvents, and ozone can deteriorate the elastomer over time.
3. Cracking: Excessive power can crack the hub of the harmonic balancer.
4. Improper Installation: Misalignment or galling during installation can cause premature failure.
5. Excessive Belt Tension: Over-tightening the serpentine belt can cause crankshaft snout runout and harmonic balancer wobble.

Troubleshooting and Replacement​

1. Visual Inspection: Check the harmonic balancer for signs of wear, such as cracks, bulges, or separation between the hub and outer ring
   5
   .
2. Use a Pulley Puller: Always use a quality pulley puller to remove the harmonic balancer to avoid damaging the crankshaft
   5
   .
3. Upgrade to a Viscous Damper: Consider upgrading to a high-performance viscous damper like the Fluidampr for improved durability and performance.

Remember to address any issues with your harmonic balancer promptly to prevent further engine damage.

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