Turbo squeal - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 03-08-2014, 06:10 PM Thread Starter
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Turbo squeal

Ok, here is the story. i have an 04 f250. EGR delete, i just pulled heads and did ARP studs and gaskets for known reasons...after install i have had issues with the turbo.
it is squealing when i throttle up and sometimes at idle. the turbo is spooling ok and when i shut it down i can hear it spinning freely. i have checked the Ypipe several times and to no avail. i have pulled the turbo several times and installed it without bolting it down into the cradle several times to insure i line up the Y pipe but still it does it. i have checked all the boots and clamps and they seem fine.
the noise is not a consistent noise. when driving down the road at a steady throttle the noise fluctuates like it is a pressure noise. while driving i have limited acceleration.
i do not have a scanner but when i have taken it to the auto store it is not throwing any turbo codes.
i would love any insight.
thanks a million.

2004 F250 6.0L Crew Cab Long Bed 4x4 Auto
EGR Delete
Head Studs
4" Exhaust
Coolant Filter Set-up

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post #2 of 6 Old 03-08-2014, 06:34 PM
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Maybe the connection with the up pipe to the manifold. Look for blow by or make sure that both sides of pipe are tight and have about the same amount of thread showing past the nut. Probably an exhaust leak.


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post #3 of 6 Old 03-08-2014, 06:48 PM Thread Starter
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i have checked them several times. if it isn't lined up correctly it isn't because of lack of trying. haha...i am looking into it again tomorrow. hoping it goes well and i can figure it out.

2004 F250 6.0L Crew Cab Long Bed 4x4 Auto
EGR Delete
Head Studs
4" Exhaust
Coolant Filter Set-up

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post #4 of 6 Old 03-08-2014, 08:47 PM
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Did you clean the unison ring while it was out? I had one make a squeal before that didn't seat back up just right and i had to redo it. If you unbolt it again, try loosening the up pipe bolts where they connect to the manifolds. Then install your Y pipe clamp. When you go to mate it up stretch the clamp out over the Y pipe. Then mate the two Y and the turbo by hand, run your finger around the entire joint to make sure it's home. Install the clamp and torque it down. Then tighten your manifold to up pipe bolts. Hope this helps.


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post #5 of 6 Old 03-08-2014, 08:53 PM Thread Starter
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thanks. yes i cleaned the unison ring. and the vains. took my time and made sure i got it clean and put back together smooth. i guess if i have to pull it again i could check it all again.

2004 F250 6.0L Crew Cab Long Bed 4x4 Auto
EGR Delete
Head Studs
4" Exhaust
Coolant Filter Set-up

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post #6 of 6 Old 03-08-2014, 09:22 PM
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Loosen the clamp on turbo to see if the housings are home all the way around. What you can see anyway.


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