6.7 Turbo Noise, Anybody have any ideas?

[Ahay1313]

Okay I got my truck serviced the other week and notices the fan would stay on alot longer then it did before. Looked at the temps and the oil temp seemed a little higher then normal. So I'm thinking they used the wrong oil maybe. So i took it back and they changed it again with the right oil and now the Turbo is making like a siren sound, really annoying load whitsle. Sounds like it's coming from the Turbo. Anybody have any thought on this?

["Stroker 8"]

Any Updates?

[strokin9]

Mine does the same thing interested to see what it is it makes loud noise around my shift points

[Strokin'Hokie]

Mine does this same thing... After driving around and coming to a stop, it sounds like the vanes of the turbo and turbo speed increase (siren sound) and the boost gauge creeps up above zero, slightly (reminder, this is at a dead stop at idle). After cycling like this 2 or 3 times, it stops usually. Not sure if this normal or if there is a leak or something not allowing the vane pitch or something to settle at idle. Anyone else?

[Dr.Evil]

From what I heard it is caused by the variable geometry turbo closing the vanes to maintain operating temps. So when its cold out you will hear it spool up a bit at idle. Its a lot more noticeable with DPF delete. I don't remember it being very loud at all with the stock exhaust. Just an idea.

[Bryce18]

Originally Posted by Dr.Evil

From what I heard it is caused by the variable geometry turbo closing the vanes to maintain operating temps. So when its cold out you will hear it spool up a bit at idle. Its a lot more noticeable with DPF delete. I don't remember it being very loud at all with the stock exhaust. Just an idea.

Yup, ive noticed this as well. especially after driving then parking and getting out while its ideling. it sounds like the turbo spools up just a little bit then unspools. mine has done it 3-4 times after parking before.

[cc2cuz]

Originally Posted by Bryce18

Yup, ive noticed this as well. especially after driving then parking and getting out while its ideling. it sounds like the turbo spools up just a little bit then unspools. mine has done it 3-4 times after parking before.

Mine does the same thing, so I'm hoping this is normal. I'm deleted by the way.