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Metallic squealing noise from engine > 2k RPM

12228 Views 17 Replies 7 Participants Last post by  Tylerfocht
2005 4.0L V6

There is a metallic chirping / squealing noise coming from the engine area over 2000RPM, so every time I shift or I'm on the highway, it's constant.

This started a while ago, and I have changed, in this order:

-Belt tensioner
-Fan clutch
-Idler pulley

Still no change. I'm at a loss. It seems like it could be anything turned by the belt or even the aftermarket parts I've already replaced, which is frustrating.

It's pretty annoying / embarrassing to drive at the moment. Any ideas?

I feel like the water pump might be the next thing to check.
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Not sure if it would apply, but Nissan TSB NTB06-072a of 04/18/2007 Drive Belt Noise (applicable to 2005-2007 Frontiers with the VQ-40) notes that on some builds, the power steering pump isn't properly aligned. The TSB offers photos to check and presents a fix if the problem is present.

This is probably not the cause of your noise, as you've replaced the belt and that would fix it temporarily.

My '06 has this problem. I tried to work the TSB (and it's a pain), but couldn't get my power steering pump to free up so that I could straighten it. The hour was late, so I threw in the towel and bolted everything up as it was. I'll try it again someday.
Just a random thought, but could you have a worn and stuck brake pad? The metallic strip that alerts to wear would begin to ride on your rotor. If you tap your brakes at speed, does the noise remain unabated? It's an unlikely source, but I thought I'd mention it.
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