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Squealing Belt on 2020 Eclipse Cross - Serpentine Belt Replacement?

0

Mike T. · rep 0 · May 22, 5:35 AM · 1 replies · solved · Question

Vehicle: 2020 Mitsubishi Eclipse Cross SE

My 2020 Mitsubishi Eclipse Cross SE, with about 45,000 miles, has developed a really annoying squealing noise, especially when I first start it up in the morning or when it's damp outside. It usually goes away after a few minutes, but it's getting louder and lasting longer. I suspect it's the serpentine belt.

Is this a common issue for the Eclipse Cross at this mileage? How difficult is it to replace the serpentine belt myself? Are there any special tools required, or is it a fairly straightforward DIY job? Also, should I be looking at replacing anything else while I'm in there, like tensioners or idler pulleys?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:35 AM

0

ClearTheCode admin answer:

That squealing noise on your 2020 Mitsubishi Eclipse Cross is a classic symptom of a worn or loose serpentine belt, especially if it's worse in damp conditions or on cold starts. At 45,000 miles, it's definitely a good time to inspect it, and replacement is a common maintenance item.

  1. Causes of Squealing:

    • Worn Belt: The rubber can harden, crack, or lose its grip over time.
    • Loose Belt: The automatic tensioner might be failing, or the belt could be stretched.
    • Contamination: Oil, coolant, or other fluids on the belt or pulleys.
    • Failing Pulley/Bearing: A failing idler pulley, tensioner pulley, or accessory pulley (alternator, AC compressor, power steering pump) bearing can also cause noise.

  2. DIY Serpentine Belt Replacement Steps:

    • Diagram: Before removing the old belt, draw a diagram or take a clear photo of the belt routing. This is crucial for correct installation.
    • Tensioner: Locate the automatic belt tensioner. You'll typically need a long breaker bar or a specific serpentine belt tool to rotate the tensioner pulley to release tension on the belt.
    • Remove Old Belt: Once tension is released, carefully slip the old belt off the pulleys.
    • Inspect Pulleys: While the belt is off, manually spin each pulley (alternator, AC compressor, idlers, tensioner). Listen for grinding, squealing, or excessive play. If any pulley feels rough or wobbly, it should be replaced.
    • Install New Belt: Route the new belt according to your diagram, leaving the tensioner pulley for last. Apply tension with your tool and slip the belt onto the final pulley.
    • Double Check: Release the tensioner slowly and ensure the belt is seated correctly in all pulley grooves.

  3. Tools Required:

    • A suitable wrench or breaker bar (often 1/2-inch drive) for the tensioner.
    • Possibly a serpentine belt tool kit, which includes various adapters and long handles.

  4. What Else to Replace:

    • Automatic Belt Tensioner: If the tensioner itself feels weak, doesn't provide adequate tension, or its pulley is noisy, it's wise to replace it along with the belt. They often wear out around this mileage.
    • Idler Pulleys: If any idler pulleys show signs of wear (noise, wobble), replace them. It's easier to do it now while the belt is off.

  5. When to See a Shop:

    • If you're unsure about identifying or replacing the tensioner/idler pulleys.
    • If, after replacing the belt, the squealing persists, indicating a deeper issue with an accessory component.
    • If you don't have the necessary tools or feel uncomfortable with the procedure.
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