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Old 08-29-2012, 02:12 PM   #138
RoketRdr
 
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Drives: 2010 Duramax; 2012 CTS-V Coupe
Join Date: Apr 2012
Location: Houston, Tx
Posts: 387
That is common on forced induction engines and is the reason why an adequate PCV system is needed. Either install breathers on both valve covers or an adequate PCV system like what Rev Extreme sells.
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