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Squealing Noise from Engine Bay on 2022 Ram 1500 V6

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Sarah K. · rep 0 · May 22, 3:36 AM · 1 replies · solved · Question

Vehicle: 2022 Ram 1500 Big Horn

I've got a 2022 Ram 1500 Big Horn with the 3.6L Pentastar V6, and I've started hearing a pretty persistent squealing noise coming from the engine bay, especially when I first start it up in the morning or when it's damp outside. It sometimes goes away after the engine warms up, but it's getting more frequent.

I'm thinking it might be the serpentine belt, or maybe one of the pulleys. The truck only has about 40,000 miles on it, which seems a bit early for a belt, but I've heard stranger things. Has anyone else experienced this with their Pentastar Ram? What should I check first, and is this a DIY job for someone with moderate mechanical skills?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:36 AM

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ClearTheCode admin answer:

A squealing noise from the engine bay of your 2022 Ram 1500 with the 3.6L Pentastar V6, especially during cold starts or in damp conditions, is a classic symptom of an issue with the serpentine belt or one of the accessory pulleys. While 40,000 miles might seem a bit early for a belt, it's not unheard of, especially if it's been exposed to contaminants or extreme temperatures.

Here's how to diagnose and address it:

  1. Serpentine Belt Inspection:
    • Visually inspect the belt for cracks, fraying, glazing (a shiny, smooth appearance), or missing ribs. A glazed belt can lose traction and squeal.
    • Check for any signs of oil or coolant on the belt, which can cause it to slip and squeal.
  2. Water Test (Caution!): With the engine running and the squeal present, carefully spray a small amount of water onto the ribbed side of the belt. If the squeal temporarily stops or changes, the belt itself is likely the culprit. If it doesn't change, the issue might be a pulley.
  3. Pulley Inspection:
    • Tensioner Pulley: The automatic belt tensioner can wear out, causing improper belt tension and noise. Check for excessive play or a weak spring.
    • Idler Pulleys: These guide the belt. Spin them by hand (with the engine off and belt removed) to check for roughness, grinding, or excessive play.
    • Accessory Pulleys: Check the pulleys for the alternator, power steering pump, AC compressor, and water pump. Listen for noise from these components individually with a mechanic's stethoscope (or a long screwdriver to your ear, carefully) once the belt is removed.

DIY Feasibility:

Replacing the serpentine belt on a 3.6L Pentastar is generally a moderate DIY job. You'll need:

  • A serpentine belt tool or a long ratchet/breaker bar to release tension on the tensioner pulley.
  • The correct replacement belt.
  • Basic hand tools.

If the issue is a pulley, it might be slightly more involved but still manageable for someone with moderate mechanical skills. Ensure you have a diagram of the belt routing before removal.

When to See a Shop:

  • If you're uncomfortable working around a running engine or removing/installing the belt.
  • If, after replacing the belt and checking pulleys, the squeal persists.
  • If you suspect an internal issue with an accessory component (like the alternator or water pump bearing), as these repairs are more complex.
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