Duramax Turbo noise - TheDieselGarage.com
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post #1 of 9 (permalink) Old 01-03-2011, 03:21 AM Thread Starter
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Duramax Turbo noise

I have a 2006 LLY engine it has 75,000 miles on it I bought it at a dealership and it is a certified vehicle. When you turn the vehicle off you can here the turbo turning for about 15 - 20 seconds and it sound like a bad bearing noise. "growling noise" I took it back to the dealer and the tech said that was normal? I have about 3000 more miles till the warranty is out. Just wanted to know if anybody has the same noise and what the fix is. I have heard other duramax engines and they do not make that noise. Thanks for your input.
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post #2 of 9 (permalink) Old 01-03-2011, 03:32 AM
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I never noticed mine doing for more than a second or two.

I would see if it throws any codes.

I will also see if one of the mods here can put this in the Duramax section.

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post #3 of 9 (permalink) Old 01-03-2011, 03:37 AM Thread Starter
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No codes and vehicle is all stock.
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post #4 of 9 (permalink) Old 01-03-2011, 05:31 AM
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are you sure that its coming from your turbo? i think i know the sound you describe, its almost an electrical buzzing? it could be your EGR valve..... orrrrrrr... it could be your VGT solenoid cycling, get a buddy to turn the truck off while your in front of it to see if you can pinpoint the noise

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post #5 of 9 (permalink) Old 01-04-2011, 04:37 AM Thread Starter
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The noise is for sure coming from the turbo like it is spooling down and the noise is like a dry bearing.
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post #6 of 9 (permalink) Old 01-04-2011, 11:10 PM
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That's the solenoid. If you start the truck then get out and walk to the tail pipe do you hear the VGT cycle. The exhaust pitch will change from a low growl to almost a whistle. It should do this every time you start it. When you kill it; it cycles to keep from it from sticking. Mine does this in just a second. Make sure you let the EGTs drop down below 400 before you kill it.

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post #7 of 9 (permalink) Old 01-05-2011, 01:00 AM
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agreed with Josh, mine does exactly the same thing, not a big deal at all

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post #8 of 9 (permalink) Old 01-06-2011, 01:49 AM
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If his keeps going though, then there is a possably problem with solenoid right?

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post #9 of 9 (permalink) Old 01-06-2011, 01:58 AM
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Quote:
Originally Posted by New 0mega View Post
If his keeps going though, then there is a possably problem with solenoid right?
The cycle only take a second or two. If his keeps spinning I would think he might be having issues with the turbo itself.

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