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Old 10-16-2018, 10:19 PM   #11
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i was gonna say normally turbochargers and alternator whine are not that close in sound or volume.
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Old 10-17-2018, 12:25 AM   #12
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Quote:
Originally Posted by OldGreyBeast View Post
The VG engines have a timing belt rather than a chain. That belt can be noisy if it's too tight. I overtightened mine on the last go round and had to take all that crap back off again to loosen it a bit. The timing stuff on the VG engines sucks so much peen.
Wait... isn't the main selling point of a timing belt that it's supposed to be quieter than a chain? I hate those ones where you have to set the tension manually and am thankful that my car has a hydraulic timing belt tensioner, even if one of the idler bearings is worn out and making a similar noise. It's also non-interference so I will roll the dice and see if it will make it another 8k until it's time to replace the timing belt again. Lol what's the worst that could happen?

VOTS, have you ruled out the possibility of it being a pinhole exhaust leak?
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Old 10-17-2018, 04:46 AM   #13
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I have not heard of this problem, but I have never owned anything in Nissan that didn't have a timing chain. (Wife has 98 Pathy, though)

You might want to try to post a video of it making the sound. Or you can sometimes narrow down a sound using the old-fashioned broomstick method.

You put the broomstick to your ear and touch it here and there around the engine. No more than 3 feet long is best.

On belt deflection, you should be able to push down in the center of the belt and with not much effort, move it a half inch.
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Old 10-17-2018, 04:42 PM   #14
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timing belt whine that sounds like a supercharger is extremely common. actually any toothed belt thats over tightened will whine like that.



makes your shitty honda civic sound cool for like 10k before the belt snaps
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Old 10-17-2018, 05:35 PM   #15
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The thing I miss most about the old Yaris is the supercharger noise. That's just a glorious sound.
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Old 10-19-2018, 11:56 PM   #16
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Thanks for all the great feedback, I hope to check a few things this weekend.

The truck has always made this sound since the day I bought it four years ago. I recently did a valve job and replaced every vacuum, coolant, emissions and fuel hose on the engine. I was hoping one of those was the cause of the whistle and would make it go away.

My truck sounds like the turbo in a 5 ton military truck circa 1978-1981. Its the same type of sound, just muted a bit.

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Old 10-20-2018, 12:50 AM   #17
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"whistle while you work" maybe its just happy!!
Snow White popped into my head, sorry lol
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Old 10-20-2018, 01:43 AM   #18
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Quote:
Originally Posted by street_rulerr View Post
timing belt whine that sounds like a supercharger is extremely common. actually any toothed belt thats over tightened will whine like that.



makes your shitty honda civic sound cool for like 10k before the belt snaps

60k later my belt still whined and had no issues. 60k mile belt too. The key is tight but not ape.
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Old 10-20-2018, 03:02 AM   #19
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Any chance a dented exhaust pipe could be causing this? Do you hear it under the truck, or near the rear of the truck?
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