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Check the PCV valve.  I've heard them make *really* weird noises before.


The coupler might be worth checking too.  Seems early on for that- but if you can pull the front cover off the blower off w/o lifting the blower from the manifold, I'd definately take a look.  All it'll cost is a new batch of S/C oil.


Maybe the bypass valve on the blower as well?


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