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Old 01-26-2014, 02:11 PM
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Odd whinning sound around 1200rpm. Video

I could use some help here fellas. 6.0 auto 2006 with an odd whine that seems to be coming from the turbo. I dont have to be driving down the road or in a gear. Doesnt need to be loaded, doesnt need to be hot or cold outside, truck doesnt need to reach operating temperature, its just a low groan/hum that starts around 1250rpm and gone by 1500 or so, the groan is replaced immediately with the "healthy turbo" whistle sound. I let off the accelerator and it groans right thru the rpm band on the way down. I took a quick video and hit the idle switch 3 times. You can hear it clearest on the 2nd and 3rd attempt. Truck runs like a top, good power and good boost, clean and healthy fluids all around. Pulled the intake expecting defective turbo fins or shaft play, but I found none of the above. Any ideas are much appreciated.

6.0 f250 noise - YouTube

Last edited by rwdunson; 01-26-2014 at 02:36 PM.
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Old 04-23-2014, 05:41 AM
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I was wondering if you ever figured out why that sound was occurring? I have the same exact sound and notice that it comes on at the same RPM that you were seeing and lasts almost until 2000 RPM. Anything after 2000 and either I just can't hear it or it goes away.

I pulled the intake yesterday so I could get to the turbo wheel and found it has about 1/16" of vertical and horizontal play but no in and out play so I don't think it's the turbo. And I'm sure it's not the power steering pump. I'm not exactly sure what could make that type of sound.

Last edited by Soledad; 04-23-2014 at 06:19 AM.
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Old 04-23-2014, 10:06 AM
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That is exactly what mine sounded like when the up-pipe had a cracked bellows. Crawl under the truck with a light and check around the up-pipe bellows and firewall. If there is any black soot, you've found your culprit.
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Old 04-23-2014, 10:40 AM
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I was told bad bearings in the turbo. A bad thrust bearing to be exact.
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Old 04-23-2014, 10:51 AM
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You should be able to confirm by pulling the intake and spinning the impeller by hand, if it's smooth, I doubt you have turbo bearing issues.

Although, if you trust the source of the diagnostic, it's not a tough fix, just a few bucks or opportunity for an upgrade...
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Old 04-23-2014, 11:39 AM
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Any one know how "easily" the turbo wheel should spin? When I spin mine I maybe get two-three full rotations before it stops. And oddly it spins a bit easier one way than the other.

I've looked for soot a few times on all of the up-pipe connections but I'm just not seeing anything. Soooooo......I'm going to wrap tinfoil around them, drive it for a while and see what I get.

Last edited by Soledad; 04-23-2014 at 11:45 AM.
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Old 04-23-2014, 12:08 PM
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Quote:
Originally Posted by Soledad View Post
Any one know how "easily" the turbo wheel should spin? When I spin mine I maybe get two-three full rotations before it stops. And oddly it spins a bit easier one way than the other.

I've looked for soot a few times on all of the up-pipe connections but I'm just not seeing anything. Soooooo......I'm going to wrap tinfoil around them, drive it for a while and see what I get.
I think you have a turbo issue. Mine spins very freely, if I give it a flick with my finger, it will spin for a few seconds.
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