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Squealing noise from engine bay in 2023 Integra - Serpentine belt?

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Mike T. · rep 0 · May 25, 3:43 AM · 1 replies · solved · Question

Vehicle: 2023 Acura Integra A-Spec

Hello everyone, I've got a 2023 Acura Integra A-Spec with about 15,000 miles on it. For the past week, I've noticed a high-pitched squealing noise coming from the engine bay, especially when I start the car cold in the morning. Sometimes it goes away after a few minutes, but other times it persists for longer, particularly when I'm accelerating.

It really sounds like a belt squeal to me. Could the serpentine belt be going bad already at 15k miles? Or could it be something else? I thought belts lasted longer than that these days. Is this something I can inspect myself, and if so, what should I look for?

Any insights would be helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:43 AM

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ClearTheCode admin answer:

A squealing noise, especially on cold starts, is a very common indicator of a failing or misaligned serpentine belt, even on a relatively new vehicle like your 2023 Acura Integra A-Spec at 15,000 miles. While modern belts are durable, issues can arise.

Here's what to consider:

  1. Causes of Squealing:

    • Belt Wear/Glazing: Even at 15k miles, a belt could be defective, worn prematurely, or glazed (hardened/shiny surface) from slippage. Glazing reduces friction.
    • Tensioner Issue: The automatic belt tensioner might be failing to provide adequate tension, allowing the belt to slip.
    • Pulley Bearing Failure: A bearing in one of the accessory pulleys (alternator, AC compressor, power steering pump, idler pulley) could be seizing or making noise, causing the belt to squeal as it passes over it.
    • Contamination: Oil, coolant, or other fluids on the belt can also cause slippage and squealing.

  2. DIY Inspection:

    • Visual Check: With the engine off and cool, inspect the entire length of the serpentine belt. Look for cracks, fraying, missing ribs, or a shiny/glazed appearance. Also, check for any signs of fluid contamination.
    • Tensioner Check: Observe the belt tensioner. It should apply consistent pressure. If it appears loose or wobbles excessively, it might be faulty.
    • Pulley Spin: Carefully try to spin each accessory pulley by hand (engine off!). They should spin smoothly with minimal resistance and no grinding noises. Any rough or noisy pulley could indicate a bad bearing.

  3. DIY Replacement (If belt is the issue): Replacing a serpentine belt is a common DIY task. You'll need:

    • Tools: A long breaker bar or ratchet to release tension on the tensioner pulley, and a diagram of the belt routing (often found under the hood or in the owner's manual).
    • Procedure: Note the belt routing, release tension, remove the old belt, route the new belt correctly, and then release the tensioner to seat the new belt. Ensure the belt is properly seated in all pulley grooves.

When to See a Shop:

  • If the squealing persists after replacing the belt, suggesting a tensioner or pulley bearing issue.
  • If you're unable to identify the source of the noise or are uncomfortable working around rotating engine components.
  • If the noise is accompanied by other symptoms like dimming lights (alternator), loss of AC, or difficulty steering (power steering, if applicable).
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