The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Squealing Noise from Engine - 2018 G90 5.0 V8 Serpentine Belt?

0

Mike T. · rep 0 · May 25, 4:38 AM · 1 replies · solved · Question

Vehicle: 2018 Genesis G90 5.0 V8

Hello everyone, I own a 2018 Genesis G90 5.0 V8 with about 70,000 miles on the odometer. Lately, I've been hearing a distinct squealing noise coming from the engine bay, especially when I first start the car in the morning or when it's damp outside. It sometimes goes away after the engine warms up, but it's becoming more frequent and louder.

I suspect it might be the serpentine belt, or possibly one of the idler pulleys. Given the mileage, is this a common maintenance item for the G90? I haven't replaced the belt since I bought the car.

Is replacing the serpentine belt a DIY job on these V8s, or is it pretty complex? What should I look out for when inspecting the belt?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:38 AM

0

ClearTheCode admin answer:

The squealing noise you're hearing from your 2018 Genesis G90 5.0 V8, especially at startup or in damp conditions, is a classic symptom of a worn or slipping serpentine belt. At 70,000 miles, it's definitely due for inspection and likely replacement.

Here's what you need to know:

  1. Causes of Squealing:

    • Worn Belt: The rubber can harden, crack, or lose its grip over time.
    • Contaminants: Oil, coolant, or other fluids on the belt can cause slippage.
    • Misaligned Pulleys: Less common, but possible if work has been done recently.
    • Worn Pulleys/Tensioner: Bearings in idler pulleys, the tensioner pulley, or accessory pulleys (alternator, power steering pump, AC compressor) can fail, causing noise and belt issues.

  2. Inspection:

    • Visual Check: With the engine off and cold, inspect the belt for:
      • Cracks or fraying on the ribbed side.
      • Glazing (a shiny, smooth appearance) on the ribbed or flat side.
      • Missing chunks of rubber.
      • Excessive slack (though the automatic tensioner should prevent this if working).
    • Pulley Play: Gently try to wiggle each pulley. Any excessive play or grinding noise when spun by hand indicates a failing bearing.

  3. Replacement Interval:

    • Most serpentine belts are recommended for replacement every 60,000-100,000 miles, or every 5-7 years, whichever comes first. Your 70,000 miles makes it a prime candidate.

  4. DIY vs. Professional:

    • DIY: Replacing a serpentine belt on the G90 5.0 V8 is generally considered a moderate DIY task. It requires understanding the belt routing, a serpentine belt tool (or a long ratchet/breaker bar) to release tension on the tensioner pulley, and patience. It's crucial to have a diagram of the belt routing before you start.
    • Professional: If you're not comfortable working in tight engine bays or dealing with spring-loaded tensioners, a professional can complete this quickly and efficiently.

  5. Steps for DIY (General):

    • Diagram the belt routing or take a photo.
    • Use the appropriate tool to rotate the automatic tensioner, relieving tension on the belt.
    • Carefully remove the old belt.
    • Inspect all pulleys for smooth rotation and no wobble.
    • Route the new belt correctly around all pulleys, ensuring it's seated properly in the grooves.
    • Release the tensioner slowly.
    • Start the engine and check for proper operation and no noise.

  6. When to See a Shop:

    • If the noise persists after belt replacement.
    • If you identify a failing pulley or tensioner bearing, as these require more involved replacement.
    • If you're unsure about any step of the DIY process.
Menu

Help & account