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Turbo Horn
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=25828		 Page 1 of 1
Author:  BankNote4X4 [ Thu Oct 25, 2007 11:38 pm ]
Post subject:  Turbo Horn
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? :?:
Author:  BlackLibertyCRD [ Fri Oct 26, 2007 12:09 am ]
Post subject:  Re: Turbo Horn
BankNote4X4 wrote:
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? :?:


I would first check the condition of the air filter possible leakage on seal then the turbo hoses connection.
Author:  dgeist [ Fri Oct 26, 2007 11:14 am ]
Post subject:  Re: Turbo Horn
BlackLibertyCRD wrote:

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


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
Author:  Endurance [ Fri Oct 26, 2007 6:51 pm ]
Post subject: 
I got that same noise, kinda like a grinding noise at around 2100 rpm. Sounds like a bad bearing inside the turbo.
Author:  BankNote4X4 [ Wed Oct 31, 2007 9:37 pm ]
Post subject: 
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.
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