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			The AOS is easy to check; start the car and let it idle, try and remove the oil filler cap.  If it is very difficult to get off, due to high vacuum, the AOS is gone.
		 
		
		
		
		
		
		
			
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				“Anything really new is invented only in one’s youth.  Later, one becomes more experienced, more famous – and more stupid.”  - Albert Einstein
			 
		
		
		
		
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