audi 80 crankcase vent

[matt payne]

I have a 1990 Audi 80 2.0 litre 4 cyl. with a little over 137,000 miles.  I 
checked the airfilter about a month ago, and found a thin coating of oil all 
throughout the intake.  I traced the problem back to the metal 
crankcase-vent tube that goes from the lower part of the engine on the 
drivers-side, back around and connects to the intake.  The 3 inch long 
rubber hose that connects the two metal tubes was melted.  I replaced this 
rubber hose and thouroughly cleaned out the inake and all of the metal 
tubes, but oil still appears in the intake.  Is there a screen or filter 
that prevents oil to pass through the metal tube into the intake, or do i 
have more serious problems (I screwed up engine?) Thanks for any help that 
you can offer me!
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