Before ya get on me about it....I have done a relatively extensive search and read of previous posts on the subject and most of the ones I read seem to deal with turbo fart and or thermostatic fan cut in under load, bearings and the like.

I only seen one or two references to what sounds like a "Ghost", whooo, whooo noise and even one reference to sounds like a basset hound. I even own a basset hound and didn't make the connection on my ow but I would agree on the sound.

The sound is more pronounced during cooler ambient temperature conditions and seems to be present between 5-10psi of boost. Once the boost is increased between 15-20psi the sound goes away. It is present every day in the winter and in summer only during cool summer mornings. I am concerned that there may be an intake leak or something like that that is causing the noise.

Has anyone else experienced this same issue and what was the diagnosis. The shop where I bought my truck has a habit of saying "it's normal" until you can show them the failed part of some literature on correcting the problem. Like when I went in for the death wobble issue, they said it was normal until I produces a TSB and then they had to hake a copy of my TSB rather than looking it up to confirm them selves.

I have also noticed some oily residue build up on the hoses coming out of the inter-cooler, is that normal?

 

I'm not sure on the rest of the issue, but this thread will tell of your oily issues...

 

not sure exactly what the first part of your post was about, but the oily residue is "normal" in the fact that it is due to the design of the engine.

it is because the crank case is vented back into the intake and the oily gases end up going through your turbo and intercooler and back into your intake manifold. also a bad seal on the turbo could cause oil to get into the charge tubes et al...

do the ccv reroute and keep your engine clean

 

The sound you describe I think is normal. My 07 has done it from day one, but as you said only when it is cooler outside and the air is denser. I bought my truck a year ago and the noise went away during the summer, came back this winter. Truck runs like a top.

 

Maybe I was typing too fast

Super 08 seems to be experiencing the same problem. I am wondering if it is the inter cooler leaking or something due to the change in temperature, maybe the parts are shrinking or expanding at different rates due to cooler ambient temperatures and that is causing a leak. It sure seems to sound like a boost leak as the turbo builds boost, the sound increases until the turbo spools back down. The sound I hear is on top of the normal turbo whine and that's whats got me concerned.

 

I don't consider it a problem myself, truck runs fine. My friend had an 06 and his turbo had the same sound when it was cold. You may be hearing something else if it sounds like a leak to you.

 

Not sure if I had the exact sound or not but it sounds similar. Mine was air pushing from the degas bottle cap as I had some very leaky headgaskets. One set of ARP headstuds, Hypermax gaskets with about .005-6 off my heads and no more "whistling-dixie" from the degas bottle.

Amp

 

The whistle seems to show up when I'm driving at highway speed and I push down the throttle and then let off under normal driving conditions under slight load or accelerating slightly.

It isn't the whoosh, whoosh, whoosh turbo fart sound you get when you punch the throttle and let off quick, it's more of a whooooooo sound that lasts a couple of seconds after I let off the throttle.

 

OK, there are some similarities to the conditions, but not the sounds... When I accelerate my truck ('04 F250) and then quickly release the throttle, I don't get turbo-fart; I get a turbo spin-down that sounds like it should... The pitch of the whistle decreases from high-to-low... Perhaps, if your turbo noise when spooling is less of a whistle and more subdued like a low roar, what you you may be hearing your turbo spinning-down... Do you get my meaning?

 

if there is a boost leak of some sort, you will hear a major air leak. the basset hound noise still sounds like your fan clutch. the newer trucks will activate the fan clutch on a cold engine to help load the engine to warm up quicker.

 

My turbo was just replaced under warranty and it makes alot of noise like kusto described in the first post. My tec told me that my old turbo was replaced with an updated one which will make more noise.Also your hoses will bleed this is common from what the tec told me.

 

i'm not sure exactly what the sound is because i dont have that problem, but now that you mention it's kind of a whistle, i've seen numerous threads about this and it seems to be a common problem, but i can't remember what the cause was.. try to do some searches this sounds familiar now that i think about it.

 

Something I have noticed with the last few rigs that I have owned is a whistle sound coming from the dash. 02 dakota, 03 HEMI ram, and 03 SD PSD. Come to find out it was the climate control modual; had a air/vacume leak in the cold weather we have up here in Vermont. Only did it when it was cold though!

 

I just tried it yesterday while in park and couldn't get the sound, I did however notice that the degas coolant bottle was empty. Topped it up with coolant 3/4 of a gallon. The sound only seems to show up while I am driving. I know it is not the fan clutch as I am running empty in a cool climate so there is no need for the fan clutch to kick in.

I am wondering if a malfunctioning EGR valve will cause the noise and possibly be evaporating my coolant at the same time. I don't think it is a head gasket as there is no excessive white smoke, tail pipe drip or coolant in the oil or vise versa. Also there are no coolant leaks on the ground......

 

EGR cooler and oil cooler issues will do this and never leave a trace... The coolant gets vaporized so quickly that a "leak" is never noticed. Take it in for a diagnostic / pressure check of the cooling system, citing the loss of coolant from the degas bottle as your concern.