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Squealing Noise from Engine - 2021 Equinox Serpentine Belt?

0

Ryan M. · rep 0 · May 22, 2:38 AM · 1 replies · solved · Question

Vehicle: 2021 Chevrolet Equinox LT

Hi all,

I've got a 2021 Chevrolet Equinox LT with the 1.5L turbo engine, and it's got about 52,000 miles on it. For the past few weeks, I've been hearing a distinct squealing noise coming from the engine bay, especially noticeable on cold starts or when it's damp outside. It usually goes away after a few minutes of driving, but it's getting more frequent.

I'm suspecting it might be the serpentine belt, as I haven't had it replaced yet. Is 52k miles a typical mileage for a serpentine belt to start showing wear on these Equinox models? What should I look for to confirm it's the belt, and is this a straightforward DIY replacement, or should I just take it to the dealer?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:38 AM

0

ClearTheCode admin answer:

A squealing noise from the engine bay, especially on cold starts or in damp conditions, is a classic symptom of a worn or loose serpentine belt, or an issue with one of the pulleys or the tensioner. At 52,000 miles, it's certainly within the range where a serpentine belt might start to show wear, though many can last longer.

  1. Common Causes:
    • Worn Serpentine Belt: The rubber can harden, crack, or glaze over, losing its grip.
    • Loose Belt Tensioner: The automatic tensioner might be failing to maintain proper tension on the belt.
    • Failing Pulley Bearing: A bearing in an accessory (like the alternator, AC compressor, power steering pump, or idler pulley) can seize or become noisy.
  2. Visual Inspection (DIY):
    • With the engine off and cool, carefully inspect the entire length of the serpentine belt. Look for cracks, fraying, glazing (a shiny, smooth appearance), or missing ribs.
    • Check the tensioner. It should apply firm, consistent pressure to the belt. If it looks loose or wobbly, it might be failing.
    • Gently try to wiggle each pulley by hand (again, engine off). Any excessive play or grinding sounds could indicate a bad bearing.
  3. Replacement: Replacing the serpentine belt on a 2021 Equinox 1.5L can be a DIY job for those with some mechanical experience. You'll need to relieve tension on the belt tensioner (usually with a wrench or specialized tool) to remove the old belt and route the new one correctly. It's often a good idea to replace the tensioner and idler pulleys at the same time, especially if they show signs of wear, as they are relatively inexpensive and prevent future issues.
  4. Safety First: Always ensure the engine is off and cool before working in the engine bay. Disconnect the negative battery terminal if you're working near electrical components.
  5. When to See a Shop:
    • If the noise persists after replacing the belt and inspecting the tensioner/pulleys.
    • If you're uncomfortable with the DIY process or don't have the necessary tools.
    • If the noise is accompanied by other symptoms, such as dimming lights (alternator issue), loss of power steering (if applicable), or AC not working, as this could indicate a failing accessory driven by the belt rather than just the belt itself.
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