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Old 08-31-2006, 01:13 PM
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my turbo going out?

My truck is a auto,96 f350 with 180,000 on it. I can hear a whining noise coming from the engine while running down the road. Its not as high pitched as a turbo sounds, but not as low as a power steering pump would sound. Almost like a high pitched police siren(no, I was'nt being chased ) . It is not a steering part because it whines with the RPM. The truck seems to run fine. I just bought this truck a couple of weeks ago, so I don't know if this is normal or not.
Thanks for putting up with my questions!
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Old 08-31-2006, 02:19 PM
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turbo

Generally if a turbo is going out you will have oil blowing out of youre tailpipe.
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Old 08-31-2006, 04:30 PM
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thats not happening, so theres a good sign.
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Old 08-31-2006, 04:56 PM
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are you sure its not your PS pump?? i have heard a viriaty of tones from them, and some are high pitched.....and also they would change with RPM...
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Old 08-31-2006, 05:07 PM
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Its possible, just never heard one sound like this. The guy I bought it from said they had just had some power stearing work done to it that is still under warranty. Might have them check it out.
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Old 09-01-2006, 08:15 AM
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To see if your turbo is bad... (I used to build turbochargers for a living)

WITH THE ENGINE OFF, AND PREFERABLY NOT HOT...

Take the air inlet tube off the turbocharger...

Look inside the turbocharger at the wheel. Look for any signs of damage or the wheel rubbing the housing. Grab the nut that holds the wheel with your fingers and spin the wheel, try to move it side to side, as well as in & out. The wheel should spin freely and there should be only a minimal (almost nonexistant) amount of play side to side, and none front to back. If you feel ANY excessive play...then your turbocharger needs a rebuild.

Usually a rebuild (replacing soft parts) costs around ~$300.

Let me know if you need any assistance.
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Old 10-23-2006, 10:59 AM
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whining

have you checked the vaccum pump? that can make a pretty wierd noise, could sound like a whining turbo
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Old 10-23-2006, 01:23 PM
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Might be a dumb question, but how do I check it?
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Old 10-24-2006, 04:45 AM
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checking a vaccum pump

should be able to hear it whining a bit or you could put a vaccum gauge on it it should pull around 20 -22 inches (i am told) my last one was pretty obvious though the pully was wobbling and grease was splattered all over the inside of the engine compartment.
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