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Discussion Starter #1
I have an 08 lmm and over the weekend the engine started to make a whistle/whine sound separate of the turbo whistle. It starts almost exactly at 2000rpm and continues after 2000rpm. When I let off the throttle it stops. I tried listening for it in park and it does not make the sound. Also if I manually down shift to get into the 2000rpm range it does not make a sound either. I checked the turbo shaft play on the compressor side and it has a very small amount of up and down movement but I don’t think it’s enough to be making contact. It also doesn’t matter if the engine is hot or cold.
 

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Just something you can check quick the Serpentine belt idlers were going on mine and made similar noise.
 

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Just something you can check quick the Serpentine belt idlers were going on mine and made similar noise.
I will try and do that tonight. I don’t think that is it since it doesn’t make a sound at idle or in park reved up to 2000.
 
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