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Squealing Noise from Engine Bay on 2019 Tucson 2.0L

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James R. · rep 0 · May 22, 3:02 AM · 1 replies · solved · Question

Vehicle: 2019 Hyundai Tucson Value

Hello fellow Tucson owners,

I've been hearing a really annoying, loud squealing noise coming from the engine bay of my 2019 Hyundai Tucson with the 2.0L engine. It's most noticeable when I first start the car in the morning, especially if it's a bit cold outside. Sometimes it also squeals when I turn the steering wheel or when the AC kicks on.

I'm thinking it might be the serpentine belt, but I'm not entirely sure. Is this a common issue for this model year? What should I look for if I try to inspect it myself? Is replacing the serpentine belt a DIY job, or should I take it to a mechanic?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:02 AM

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Hello Robert S.,

A loud squealing noise from the engine bay, especially on cold starts, when turning the steering wheel, or when the AC engages, is a classic symptom of a worn or loose serpentine belt. This is a very common issue across many vehicle makes and models, including your 2019 Hyundai Tucson 2.0L, as the belt is a wear item.

Causes of Serpentine Belt Squeal:

  1. Worn Belt: The rubber can harden, crack, or become glazed over time, losing its grip on the pulleys.
  2. Loose Belt: The automatic tensioner might be failing, not providing enough tension to the belt.
  3. Misaligned or Worn Pulleys: Pulleys (alternator, power steering pump, AC compressor, idler pulleys) can develop wear or become misaligned, causing the belt to slip.
  4. Contamination: Oil, coolant, or other fluids on the belt can cause slippage and squealing.

DIY Inspection Steps:

  • Visual Check: With the engine off and cool, carefully inspect the entire length of the serpentine belt. Look for:
    • Cracks: Small cracks across the ribs are normal, but deep or numerous cracks indicate significant wear.
    • Fraying: Edges of the belt coming apart.
    • Glazing: A shiny, smooth appearance on the ribbed side, indicating the rubber has hardened.
    • Missing Ribs: Any sections where the ribs are torn off.
  • Tensioner Check: Observe the automatic tensioner. It should provide consistent tension. If it looks loose or wobbly, it might be failing.
  • Pulley Check: Gently try to wiggle each pulley by hand (engine off!). Any excessive play or grinding noises when spinning a pulley could indicate a failing bearing.

Is it a DIY Job?

Replacing a serpentine belt on a 2019 Tucson can be a DIY job for someone with moderate mechanical experience and the right tools. You'll need:

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

When to See a Shop:

  • If you're uncomfortable with the process or don't have the necessary tools.
  • If the squealing persists after replacing the belt, indicating a potential issue with a tensioner or one of the accessory pulleys.
  • If you notice any other unusual noises (grinding, clunking) from the pulleys, as this could indicate a more serious component failure.
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