High-pitched whine sound under acceleration - Page 2 - Diesel Forum - TheDieselStop.com
6.4L Power Stroke Engine and Drivetrain Discussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.

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post #16 of 18 (permalink) Old 08-24-2009, 03:19 PM
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Well, I got my truck back and they said it was a split in one of the boots going to the turbo. Not the turbo it self. Still covered under waranty. I didn't hear it on the way home but I'll keep up on it and see if it comes back.

2008 F250 King Ranch Crew.
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post #17 of 18 (permalink) Old 08-25-2009, 12:38 AM Thread Starter
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Originally Posted by creepytc View Post
Well, I got my truck back and they said it was a split in one of the boots going to the turbo. Not the turbo it self. Still covered under waranty. I didn't hear it on the way home but I'll keep up on it and see if it comes back.
Did they say what the cost would be if not under warranty?
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post #18 of 18 (permalink) Old 10-21-2019, 12:58 PM
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Valve cover mounting stud for turbo sheared

I had the same symptoms. However, I had a different cause. The U-shaped "hose assembly" had backed out of the air duct due to the shearing of the mounting stud which mounts to the valve cover. The stud is part # W302461. The upper front one (easiest to get to) was sheared allowing a gap between the hose assembly and the air duct.

Easy to get to. Took about 1 hour. Had to loosen all 4 stud mounts to get the one out. A set of new studs is only $18.

I knew where to look because last year, all 4 studs broke causing the hose assembly to back completely out and I lost my turbo. That was a 4 hour fix. Mostly just taking off all the stuff so I could get to the bolts.
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  Diesel Forum - TheDieselStop.com > 2008-2010 Ford Super Duties > 6.4L Power Stroke Engine and Drivetrain

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