I started getting a sound from my turbo this week. A loud buzz/hum, like a horn(as much as a turbo can sound like a horn).
Similar to the turbo buzz when decelerating from highway speeds: 75-80 mph(which I assumed was normal), but louder/worse tone.
It happens for a split second on acceleration sometimes, but mostly for 1/2 to 1 second when letting off the fuel pedal.
Seems like when it gets warmed up it gets better.
Cooler air temps of 40's affecting it?
Or the fuel? If that can affect the turbo(because it took alomst 7 seconds to start it yesterday morning when its usually 1/2 second.)
Is this the begining of the end for the turbo?
Is there an easy way to check it?
Is there anything I can do to help protect it?
Can I explain this to a dealer to get a new one?
Is there any possible upgrade that would be more reliable?

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2006 CRD Sport Khaki

Lift Pump, Fuel Cooler
Raycor: head, filter, heater
Provent, ORM
SunCoast, TransGo, 2007 pump, B&M stacked plate tranny cooler
V6 Airbox, Wix Filter
AirLift 1000 Rear Air Bags
Fia front cover

Coming soon:
Fuel cooler bypass valve
InMotion tuning
new muffler
300,000 miles here I come

I would first check the condition of the air filter possible leakage on seal then the turbo hoses connection.

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2006 Black Jeep Liberty CRD Limited
K&N, Samco Hoses, Michelin 245/70-16 LTX A/T2, Fumoto F-102, V-Force Muffler, Mopar, Hitch, Trailer Wiring, Skid Plates, Slush Mats, Rear Shelf, Predator Stage 1, Transgo, ORM & CodeReader, Facet 40109 Pump
"IT'S A DIESEL THING, YOU WOULDN'T UNDERSTAND"
Certified Services Auto & Truck Repair

To elaborate a little, the connection from the air box to the turbo (whose clamp you probably need to pull the air box to reach) is really likely. I thought I had an oil leak until I found that the intake was not tightened and was seeping out from the CCV condensation. I'd look for that one if it's a sucking sound. If it's more of a blowing sound, the top outlet on the turbo or to inlet to the intercooler (same hose) seem like bigger potential culprits. You can check all of them at the same time, though.

Dan

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2005 Silver CRD Limited
245/75R16 GoodYear Duratracs
Fumoto drain | ProVent CCV Filter
Stanadyne FM100 filter | Cummins fuel pump
GDE Eco | SEGR | BoulderBars | FrankenLift | Frankenskids

I got that same noise, kinda like a grinding noise at around 2100 rpm. Sounds like a bad bearing inside the turbo.

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2005 CRD Sport
Mods: Glasspack, OME HD Struts & Springs, 2" Daystar lift,
255/70/16 General Grabber AT2's on MOAB's
ORM&EHM with great success!
TJM T17 Bumper, 50W KC HID's

I think it may be the bearing in the turbo as well.

Since this seems to be the weakest link according to the manual, can someone advise if there is a way to test the bearings so I can get a dealer to put in a new one?

I'll also check the vacuum solenoid filter- but it never seems to get dirty.

_________________
2006 CRD Sport Khaki

Lift Pump, Fuel Cooler
Raycor: head, filter, heater
Provent, ORM
SunCoast, TransGo, 2007 pump, B&M stacked plate tranny cooler
V6 Airbox, Wix Filter
AirLift 1000 Rear Air Bags
Fia front cover

Coming soon:
Fuel cooler bypass valve
InMotion tuning
new muffler
300,000 miles here I come