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2001 Infiniti QX4/Nissan Pathfinder - what is this noise? (streamable.com)
submitted 4 months ago by to c/mechanicadvice@lemmy.world
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Sounds like gears rubbing or something. Maybe a chain or belt? Sounds like it’s coming from the front of the engine and it goes up and down in pitch with throttle.

For context, I recently got some water in the intake, but not enough to hydrolock. Changed MAF. Idles fine.

Thanks!

EDIT: I think the sound is coming from one of the belt pulleys. Upper left one?

Edit edit: I’m pretty sure it’s the alternator now. Will follow up.

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[–] [S] 1 point 4 months ago

Thanks! I’ll have to get a long screwdriver. I only have a long piece of metal and it does t transmits sound but I can feel the vibrations are stronger on the alternator.

It’s an old alternator anyways (20+ years, 100k+ miles) so I’ll replace it and hopefully that’ll do the trick.

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