WHAT IS THIS NOISE? - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 09-14-2007, 06:52 PM Thread Starter
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WHAT IS THIS NOISE?

i have been tryin to figure out this noise my 99 psd has been making and its driving me nuts. you can hear the noise well from the sides of the truck. it sounds kind of like a messed up pulley. It runs fine and everything is fine its just the noise. the noise goes away at high rpms, and it goes away while coasting in overdrive. i thought it may be the idler pulley because that happend in my old truck but i checked it and it wiggles a little bit but i dont think that would make the noise im hearing. Do i have another pulley on a belt tensioner on my motor? maybe the noise is nothing and im just paranoid but im not sure so i figured i could turn to you guys. You guys now your stuff!
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post #2 of 12 Old 09-14-2007, 07:08 PM
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Is it a repeated whooshing sound, right after letting off of heavy throttle?

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post #3 of 12 Old 09-17-2007, 05:31 PM Thread Starter
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no, its sometimes at idle and low rpms, it sounds like a bad bearing, im not sure though.
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post #4 of 12 Old 09-17-2007, 05:34 PM
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Maybe Turbo surge??

RICK


97 F350 CREW CAB 4x4, 7.3 TURBO DIESEL, DIY INTAKE , TW TUNES
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post #5 of 12 Old 09-17-2007, 05:42 PM Thread Starter
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maybe but its not like an "airy" or "wooshing" sound. Ive been listening to some other powerstrokes, some make the same noise, some dont? its weird. im going to try and replace the idler pulley and the tensioner pulley and if thats not it i dont know what ill do.
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post #6 of 12 Old 09-17-2007, 05:46 PM
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Good luck. It sure is hard to guess without actually hearing it, ya' know?

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post #7 of 12 Old 09-17-2007, 05:46 PM
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the fan clutch could be shot making the fan wobble to



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post #8 of 12 Old 09-17-2007, 05:49 PM Thread Starter
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thanks guys, im gonna look into it more this weekend, and ill let you guys know whats up!
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post #9 of 12 Old 09-17-2007, 05:49 PM
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i had a strange noise like that it was the idler pully that internaly shattered and ripped my belt apart leaving me stranded. the second time i heard that noise i got to a shop and it was a different pully on its way out. for me there was no visual indication ,and a sound that was hard to pin point. good luck
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post #10 of 12 Old 09-17-2007, 06:34 PM
Thats Mr. Oil Leak.....

 
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my vote is a bad bearing in one of the pullies

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