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Squealing Noise from Engine Bay on 2017 Accord - Serpentine Belt?

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Laura J. · rep 0 · May 22, 2:46 AM · 1 replies · solved · Question

Vehicle: 2017 Honda Accord Sport

I've got a 2017 Honda Accord Sport with the 2.4L engine, and lately, I've been hearing a distinct squealing noise coming from the engine bay. It's most noticeable when I first start the car in the morning or when it's damp outside, and sometimes when I turn the steering wheel.

The car has about 85,000 miles on it. I'm suspecting it might be the serpentine belt, but I'm not entirely sure. Is this a common issue for this model year, and is it something I can inspect or replace myself? What tools would I need?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:46 AM

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ClearTheCode admin answer:

Your suspicion about the serpentine belt is very likely correct, especially given the mileage and the conditions you describe. Squealing noises, particularly on cold starts or in damp weather, are classic symptoms of a worn or loose serpentine belt.

Here's how to diagnose and what to consider for replacement:

  1. Visual Inspection: With the engine off and cool, carefully inspect the serpentine belt. Look for:
    • Cracks, fraying, or missing ribs.
    • Glazing (a shiny, smooth appearance) on the belt's surface.
    • Signs of oil or fluid contamination.
  2. Water Test (briefly): While the engine is running and squealing, you can carefully spray a small amount of water onto the ribbed side of the belt. If the squeal temporarily stops, it strongly indicates the belt is the culprit. If it doesn't stop, the issue might be a pulley or tensioner.
  3. Tensioner and Pulleys: The squeal can also come from a failing automatic belt tensioner or one of the idler pulleys. Check for excessive play or noise when spinning the pulleys by hand (engine off!).

Replacing the serpentine belt on a 2017 Honda Accord 2.4L is a moderately difficult DIY task. You'll typically need:

  • A wrench or ratchet with the correct size socket (often 14mm or 19mm) to release tension on the automatic tensioner.
  • A new serpentine belt (ensure it's the correct length and number of ribs for your specific engine).
  • A diagram of the belt routing (usually found under the hood or in the owner's manual).

When to see a shop:

  • If you're uncomfortable working around moving engine parts or releasing belt tension.
  • If the squealing persists after replacing the belt, suggesting a failing tensioner, idler pulley, alternator, or AC compressor bearing.
  • If the belt is difficult to access or route, or if you lack the necessary tools.
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