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				Vario cam tensioner pad
			 
			 
			
		
		
		
			Everytime I change my oil I see little bits of brown plastic in the filter element.  This looks like  Vario cam tensioner pad material.  Does track driving cause more aggressive wear of this material/component?  How long do I have before I loose proper actuation and phasing of the cam shafts?  What will the tell tail signs.....perhaps minimal power change through 4000 rpm? 
 
Has anyone had to replace these things?
		 
		
		
		
		
		
		
			
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