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Serpentine Belt Squeal on 2017 Chrysler 200S 2.4L

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Mike T. · rep 0 · May 25, 4:25 AM · 1 replies · solved · Question

Vehicle: 2017 Chrysler 200S 2.4L

Hey guys, I have a 2017 Chrysler 200S with the 2.4L engine, and I'm getting an annoying squealing noise from the engine bay, especially on cold starts or when it's damp outside. It sounds like a classic serpentine belt squeal.

The car has about 85,000 miles on it, and I don't think the belt has ever been replaced. Is this mileage typical for a belt replacement? What should I look for to confirm it's the belt and not something else like a pulley?

Any advice on checking the belt condition or if it's a DIY job would be great. Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:25 AM

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A squealing serpentine belt is a common issue and usually a straightforward fix. At 85,000 miles, it's definitely a good time to inspect and potentially replace the belt on your 2017 Chrysler 200S 2.4L.

Causes of Serpentine Belt Squeal:

  • Worn Belt: The rubber can harden, crack, or become glazed over time, losing its grip.
  • Misaligned or Worn Pulleys: Pulleys (tensioner, idler, alternator, AC compressor, power steering pump, water pump) can develop play or rough bearings.
  • Incorrect Belt Tension: A belt that is too loose or too tight can squeal.
  • Contamination: Oil, coolant, or other fluids on the belt can cause it to slip.

DIY Inspection & Replacement:

  1. Visual Inspection (Engine Off!): With the engine off and cool, carefully inspect the entire length of the serpentine belt. Look for:
    • Cracks, especially on the ribbed side.
    • Glazing (a shiny, hard appearance) on the ribbed or smooth side.
    • Missing chunks of rubber.
    • Fraying edges.
  2. Check Pulleys: Wiggle each pulley by hand (again, engine off). There should be no excessive play or grinding noises. Spin them to check for smooth operation.
  3. Belt Replacement:
    • Diagram: Before removing the old belt, draw a diagram or take a photo of the belt routing.
    • Tensioner: Locate the automatic belt tensioner. You'll typically use a wrench or breaker bar on a specific point on the tensioner to relieve tension and swing it away from the belt.
    • Remove Old Belt: Once tension is off, carefully slip the old belt off all pulleys.
    • Install New Belt: Route the new belt according to your diagram, ensuring it sits correctly in all pulley grooves. The last pulley to route should be the one where you can easily apply tension with the tensioner.
    • Release Tensioner: Slowly release the tensioner, ensuring the belt remains properly seated.
    • Double Check: Start the engine briefly to ensure the belt is running smoothly and quietly.
  4. Recommended Belt: Use a high-quality replacement belt that matches the OEM specifications for your vehicle.

When to See a Shop:

  • If, after replacing the belt, the squealing persists, indicating a potential issue with a pulley bearing, alternator, or other accessory.
  • If you're uncomfortable with the process, as it involves working near moving parts and can be tricky to route correctly.
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