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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Squeeling noise

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Old Dec 28, 2016 | 03:29 PM
  #1  
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Squeeling noise

squeeling whistleing noise question
2008 f350 with 180k.
at idle truck is quiet, reving motor truck is quiet
at takeoff from a stop there is a whistle noise sort of squeal noise.
what the hell could this be? tensioner? turbo? any thoughts and how to check?
Can't seem to locate where but seems to be under load
thanks
 
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Old Dec 29, 2016 | 04:14 AM
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Uppipe leak? My truck did same when uppipe leak.

 
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Old Dec 29, 2016 | 11:25 AM
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Or is it more of a squeal like this?

https://m.youtube.com/watch?v=S7tgWIGdV2Q

i hear 6.4s squeal like that all the time. It more often is due to a failed exhaust manifold gasket, but can also be the turbo(s).
 
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Old Dec 30, 2016 | 12:41 PM
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Sounds just like the second video-
I guess I will poke around under the hood some more......
 
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Old Dec 30, 2016 | 05:32 PM
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So I noticed it is quiet at idle, as I pull off it starts at 2000-2500 rpm under load....... Can't pinpoint anything tho
 
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