Ever since ive owned this truck its had this strange whine. Not the first 6.0 ive heard with this noise on. Boost was good and driveability was perfect (after all the breakdowns ive had).
Lately ive noticed that its very hit and miss with the turbo. Quick spool up, slow spool up, and very laggy, and so on. Has to be sticking right?
Did some quick diagnosing and found the veins are sticking in a particular spot.
Pulled the turbo and split it. This is what i found:








All the veins looked like this.







So i'm just curious if anyone has seen this and what you think may have caused this

 

In not an expert by far but it looks like it got really hot to me. Or something went thru it. Is your egt probe still in one piece?

 

Either it ate something or the bearings have play int shaft maybe? Wow that stinks

 

I haven't checked it out yet. Its a couple months old and is still reading normal. Like i said the turbo has made this whine since day 1. The laggy part just started to get bad when i got home from work. It sat for a month in the spring thaw. It sounded and felt rusty/grabby when I moved the plunger manually. when i bought it the head gaskets were toast and it had a dreaded edge tuner. Im assuming the previous owner drove it hard.

 

Theres no end play in the shaft from what i can tell.

 

I lunched one in my '06 last year but it was a sheared shaft. Gave the same symptoms you described but the turbine didn't have that kind of damage. I'm just shooting from the hip but it looks like it was throwing molten metal onto the vanes. I wouldn't think it was any kind of foreign object damage as it would have had to come through the engine to get there but, like I said, I'm just guessing. I would guess you would see other problems though if you got it that hot on the exhaust side.

 

Im curious at what temperature the turbine will melt? Pulling ive touched as high as 1350 before. Not more than a split second before. Highway im at 750. Normal driving i never really push past 1100.

 

Did you do any work to the truck lately? Maybe a bolt os something got in the intake.

 

The last thing i did to the engine was a couple injectors a few month ago. Well other than maintenance.

 

What kind of strange whine was it?

Something like this?

 

Thats the sound!! Why does it do that?

 

It looks like something was ingested, the sharp edges on the breaks of the turbine blades makes me think they were broken off not melted from high temperatures.

 

This engine had some work done to it before i bought it so anything is possible. I know when i did the heads i blew everything out including the manifolds with shop air to make sure i didnt drop something in there. excluding the turbo as i plugged all the opening.
On a slightly different not.. I wonder if this has something to do with the boost always reading a negative number at idle. I replaced my map sensor in attempt to solve that issue.

 

You know I have no clue why it makes that sound when the turbine blades get chewed up. I found a youtube video months ago where a guy used shop air to spin up a turbo from the turbine side that had chewed up blades and it sounded the same exact way. And that's exactly how my turbo sounds. I just haven't pulled the down pipe yet and stuck my bore scope in there to check.

I figure the blades being like that can result from an overspin and fracturing off a tiny piece or getting way to hot for an extended period or something got ingested. Heck, I wonder if liquid could do that too?

 

Is your EGT sensor upstream of the turbo? I would check on that. It basically ate something.