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Squealing Noise from Engine Bay on 2020 Forte - Serpentine Belt?

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Robert C. · rep 0 · May 22, 3:11 AM · 1 replies · solved · Question

Vehicle: 2020 Kia Forte GT

Hi everyone,

My 2020 Kia Forte GT, which has about 45,000 miles on it, has recently started making a loud squealing noise from the engine bay. It's most noticeable on cold starts and sometimes when I turn the steering wheel, especially at low speeds. It sounds like a classic belt squeal to me.

I'm thinking it might be the serpentine belt (also known as the drive belt). What's the typical lifespan for these belts on a Forte, and how can I check if it's the culprit? Is replacing the serpentine belt a feasible DIY project for someone with moderate mechanical skills, or is it best to take it to a mechanic?

Any tips on inspection or replacement would be super helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:11 AM

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Hello Mark,

That squealing noise you're describing is indeed a very common symptom of a worn or loose serpentine belt. At 45,000 miles, it's definitely within the range where a belt might start showing signs of wear, although many can last longer. The serpentine belt drives multiple accessories like the alternator, power steering pump (if hydraulic), AC compressor, and water pump, so its condition is crucial.

Here's how to diagnose and approach a potential replacement:

  1. Inspect the Belt:

    • Visual Check: With the engine off and cool, carefully inspect the entire length of the belt. Look for:
      • Cracks, especially across the ribs.
      • Fraying edges.
      • Missing chunks or glazing (a shiny, hardened appearance).
      • Oil or fluid contamination.
    • Tension Check: While harder to do without a tension gauge, you can often feel if the belt is excessively loose by trying to twist it. It should have some give but not be floppy.

  2. Identify the Source:

    • The squeal can also come from a failing pulley bearing (e.g., idler pulley, tensioner pulley, or an accessory pulley). If the belt looks good, try to pinpoint the noise with a mechanic's stethoscope or a long screwdriver to your ear (carefully!) against the various pulleys.

  3. DIY Replacement Feasibility:

    • Replacing a serpentine belt on a Kia Forte is generally considered a moderate DIY job. It requires:
      • Tools: A wrench or socket to release the tensioner (often a 17mm or 19mm, but check your specific model's manual).
      • Diagram: A diagram of the belt routing (usually found under the hood or in your owner's manual) is essential.
    • Steps:
      1. Locate the automatic belt tensioner.
      2. Use the appropriate wrench to rotate the tensioner, relieving tension on the belt.
      3. Carefully remove the old belt, noting its routing.
      4. Route the new belt exactly as the old one was, ensuring it's seated correctly on all pulleys.
      5. Release the tensioner slowly.
      6. Double-check all pulleys and start the engine to ensure proper operation.

  4. When to See a Shop:

    • If you're uncomfortable working around the engine.
    • If you can't easily access the tensioner or belt.
    • If the squealing persists after replacing the belt, indicating a failing pulley or accessory.
    • If the belt breaks, as this will leave you stranded and can cause overheating (due to water pump failure) or battery drain (due to alternator failure).

Replacing a worn serpentine belt is a good preventative maintenance step and should resolve your squealing issue. Good luck!

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