whistling noise...turbo?

[2trout]

this is my first diesel-turbo, so still trying to get used to all the new noises etc.
With a window down, I can hear a whistling noise, increasing and decreasing in tone and intensity with relevant throttling, is that the turbo?
My 2002 came fitted with a cold air intake and 4" exhaust, in case these mods have anything to do with that.

 

[millerman04]

Goin out on a limb here, check the driver side intercooler tube down by the power steering lines. They ten to rub a hole into the tube. An easy check anyways just in case that isnt the problem. goodluck

 

[workin' diesel]

Where does the whistling noise come from? Under the hood or from the tail pipe? I have the same type of setup and mine whistles pretty good from the tail pipe. When it was stock it seemed to be more noticeable under the hood.

 

[millerman04]

Another thought, what was the outside temp when you heard this?

 

[8lug]

Your first diesel? Yes, it's the turbo, I love that sound. When I first got my diesel and did the intake and exhaust I used to roll through parking lots at 4 miles an hour increasing and decreasing throttle just to hear it

 

[blk smoke lb7]

Did it sound like this lol http://www.youtube.com/watch?v=fXCQzM4jFhU

 

[2trout]

thanks for the feedback. Come to think of it, I sometimes hear similar whistling noise coming from semi tractors.
I am pretty sure it comes from under the hood, inside the cabin you can just hear a turbine kind of noise at the same time, so I am assuming it is the turbo.
Now, this truck too has been chipped/programmed, how, I do not know yet, but am finding out in a week when I get it scanned and see what was done to it.

As a side question, I also get some white smoke from exhaust when idling, engine warm, have not noticed it when driving. No black smoke at any time.
I am running with OptiLube in the diesel, prescribed amount.

 

[2trout]

Did it sound like this lol http://www.youtube.com/watch?v=fXCQzM4jFhU

yup...like that!...but only hear it with window down, when windows closed, I hear a slight turbine sound.....