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  #1  
Old 01-31-2012, 08:42 AM
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Please help! Turbo whine on 300D

Please watch this youtube video. About 5 seconds into video is when it starts. I was revving the engine to get the turbo to spin, once it does it makes that sound. Any ideas?

Mercedes Turbo Whine - YouTube

It does it with the air cleaner on also. It just started this yesterday. About a week ago the turbo whistle became louder (sounded more like exhaust leak) which I thought was due to an exhaust leak. The exhaust is not in good shape so that is why I assumed it was an exhaust leaking cause the turbo to get louder. But this new sound is something I've never heard from a Mercedes diesel (only been around 5 of these old diesels.)

Any help would be great!
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  #2  
Old 01-31-2012, 08:49 AM
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Inspect the waste gate hose.

Doesn't sound exhaust related.
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  #3  
Old 01-31-2012, 08:51 AM
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I agree this does not. Before this sound the turbo sounded normal but louder so I figured exhaust.

Thanks, I'll check it next break.
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  #4  
Old 01-31-2012, 09:33 AM
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Waste gate hose is fine, still making the noise. Any other ideas?
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  #5  
Old 01-31-2012, 10:48 AM
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Have you checked for lateral play in the shaft?
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Old 01-31-2012, 11:40 AM
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No. Do I just reach in the intake side and try to move it?
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  #7  
Old 01-31-2012, 12:16 PM
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Well I just went out and tried to move it. It moves a little bit, how much is ok? Any at all?
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  #8  
Old 01-31-2012, 12:23 PM
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which way did you move it? in out or up down?
should be near zero in out, and little up down IIRC...
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  #9  
Old 01-31-2012, 12:58 PM
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It doesn't move in and out, just up and down a little.
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  #10  
Old 02-01-2012, 10:48 AM
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Its pulling in air around the inlet gasket from the air cleaner would be my guess like others here have said ,tighten the clamp up or get a new or better one.
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  #11  
Old 02-01-2012, 11:21 PM
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You can make a boost boot to test for air leaks. Just push the google button a little & lots of info will appear.
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  #12  
Old 02-02-2012, 06:18 AM
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It's not the inlet gasket. This is much different.
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  #13  
Old 02-02-2012, 08:26 AM
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Quote:
Originally Posted by Junkman View Post
You can make a boost boot to test for air leaks. Just push the google button a little & lots of info will appear.
Edit: ....make a boot, pressurize the system and find out where it is leaking.
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  #14  
Old 02-03-2012, 08:38 AM
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What year is the car? If its a newer 300D, it could be the ARV. Try pulling out the vacuum hose to the ARV and see if the the whistle goes away.
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  #15  
Old 02-04-2012, 07:30 AM
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It's an 83. I did see on a thread something about the ARV but have no clue what that is. lol
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